{
  "evaluation_id": "EVAL-20260207-155037",
  "question_id": "EDGE-008",
  "question_text": "A meeting is scheduled for:\n- \"Next Tuesday at 3 PM\" \n- The organizer is in New Zealand (NZDT, UTC+13)\n- One attendee is in San Francisco (PST, UTC-8)\n- Another is in India (IST, UTC+5:30)\n- It's currently Sunday, December 15, 2024, 10 AM in New Zealand\n\n1. What is the exact UTC time of the meeting?\n2. What local time is it for each participant?\n3. What date is it for each participant when the meeting starts?\n4. If the meeting recurs \"weekly at the same time,\" what happens when DST changes?\n\nBe precise about date line crossings.",
  "category": "edge_cases",
  "timestamp": "2026-03-07T00:00:00.000Z",
  "display_date": "Mar 07, 2026",
  "winner": {
    "name": "Grok 3 (Direct)",
    "provider": "xAI",
    "score": 9.8
  },
  "avg_score": 9.311,
  "matrix_size": 90,
  "models_used": [
    {
      "id": "gemini_3_flash",
      "name": "Gemini 3 Flash Preview",
      "provider": "Google"
    },
    {
      "id": "deepseek_v3",
      "name": "DeepSeek V3.2",
      "provider": "DeepSeek"
    },
    {
      "id": "mimo_v2_flash",
      "name": "MiMo-V2-Flash",
      "provider": "Xiaomi"
    },
    {
      "id": "grok_4_1_fast",
      "name": "Grok 4.1 Fast",
      "provider": "xAI"
    },
    {
      "id": "grok_direct",
      "name": "Grok 3 (Direct)",
      "provider": "xAI"
    },
    {
      "id": "claude_sonnet",
      "name": "Claude Sonnet 4.5",
      "provider": "Anthropic"
    },
    {
      "id": "gpt_codex",
      "name": "GPT-5.2-Codex",
      "provider": "OpenAI"
    },
    {
      "id": "gpt_oss_120b",
      "name": "GPT-OSS-120B",
      "provider": "OpenAI"
    },
    {
      "id": "claude_opus",
      "name": "Claude Opus 4.5",
      "provider": "Anthropic"
    },
    {
      "id": "gemini_3_pro",
      "name": "Gemini 3 Pro Preview",
      "provider": "Google"
    }
  ],
  "rankings": {
    "grok_direct": {
      "display_name": "Grok 3 (Direct)",
      "provider": "xAI",
      "average_score": 9.8,
      "score_count": 7,
      "min_score": 9.45,
      "max_score": 10,
      "rank": 1
    },
    "gpt_codex": {
      "display_name": "GPT-5.2-Codex",
      "provider": "OpenAI",
      "average_score": 9.73,
      "score_count": 8,
      "min_score": 9.25,
      "max_score": 10,
      "rank": 2
    },
    "claude_opus": {
      "display_name": "Claude Opus 4.5",
      "provider": "Anthropic",
      "average_score": 9.65,
      "score_count": 7,
      "min_score": 8.8,
      "max_score": 10,
      "rank": 3
    },
    "claude_sonnet": {
      "display_name": "Claude Sonnet 4.5",
      "provider": "Anthropic",
      "average_score": 9.46,
      "score_count": 8,
      "min_score": 7.9,
      "max_score": 10,
      "rank": 4
    },
    "mimo_v2_flash": {
      "display_name": "MiMo-V2-Flash",
      "provider": "Xiaomi",
      "average_score": 9.24,
      "score_count": 8,
      "min_score": 7.35,
      "max_score": 10,
      "rank": 5
    },
    "gpt_oss_120b": {
      "display_name": "GPT-OSS-120B",
      "provider": "OpenAI",
      "average_score": 9.24,
      "score_count": 8,
      "min_score": 8.25,
      "max_score": 9.8,
      "rank": 6
    },
    "grok_4_1_fast": {
      "display_name": "Grok 4.1 Fast",
      "provider": "xAI",
      "average_score": 9.13,
      "score_count": 6,
      "min_score": 8.55,
      "max_score": 9.8,
      "rank": 7
    },
    "deepseek_v3": {
      "display_name": "DeepSeek V3.2",
      "provider": "DeepSeek",
      "average_score": 9.09,
      "score_count": 7,
      "min_score": 8,
      "max_score": 10,
      "rank": 8
    },
    "gemini_3_flash": {
      "display_name": "Gemini 3 Flash Preview",
      "provider": "Google",
      "average_score": 8.98,
      "score_count": 8,
      "min_score": 6.25,
      "max_score": 10,
      "rank": 9
    },
    "gemini_3_pro": {
      "display_name": "Gemini 3 Pro Preview",
      "provider": "Google",
      "average_score": 8.8,
      "score_count": 1,
      "min_score": 8.8,
      "max_score": 8.8,
      "rank": 10
    }
  },
  "judgments": [
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 6.25,
      "brief_justification": "The response contains a critical calculation error: San Francisco at UTC-8 from 02:00 UTC should be 18:00 (6:00 PM) on Monday Dec 16, which is correct, but India at UTC+5:30 from 02:00 UTC should be 07:30 AM on Tuesday Dec 17, which is also correct. However, the UTC calculation itself is correct. Wait - reviewing again: 02:00 UTC + 5.5 hours = 07:30, and 02:00 UTC - 8 hours = 18:00 previous day. The calculations appear correct. The presentation is excellent with clear tables and thorough DST analysis."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 9,
      "brief_justification": "The response correctly calculates UTC time, local times, and date line crossings with accurate arithmetic. The DST analysis is thoughtful and identifies the key complexity of mismatched DST transitions between regions. Minor deduction for not fully elaborating on the exact weeks of mismatch or providing specific dates for the DST transition effects, but overall excellent and well-structured."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 9.8,
      "brief_justification": "The response demonstrates flawless time zone calculations with correct UTC conversion (02:00 UTC on Dec 17), accurate local times for all participants including the date line crossing for San Francisco (Mon Dec 16, 6 PM), and thorough DST analysis covering multiple scenarios. The presentation is exceptionally clear with a summary table and well-organized sections."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 9.2,
      "brief_justification": "The response correctly calculates UTC time (02:00 UTC on Dec 17) and all local times with accurate date line crossing identification for San Francisco. The DST analysis is thorough and accurate, covering all three regions' transitions. Minor deduction for the India DST note mentioning '30 min earlier' which is slightly confusing in context, but overall excellent precision and practical guidance."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate with correct UTC conversion (2 AM UTC), precise local times for all participants, and proper date handling including the date line crossing for San Francisco. The DST analysis is exceptionally thorough, covering both fixed-local and fixed-UTC scenarios with specific transition dates. The explanation is well-structured though slightly verbose, but this thoroughness adds practical value."
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 9.8,
      "brief_justification": "The response is exceptionally accurate with correct UTC calculations, timezone conversions, and date line crossing identification. It provides comprehensive DST analysis with specific transition dates, clear visual formatting, and actionable recommendations for handling recurring meetings across timezones."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "No response was provided to evaluate. The response field is completely empty, making it impossible to assess any of the criteria."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 9.8,
      "brief_justification": "Exceptionally accurate response with correct UTC conversion, proper date-line crossing identification, and comprehensive DST analysis. The tabular format and dual-scenario DST explanation (fixed local vs fixed UTC) demonstrate deep understanding and practical utility."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 9.4,
      "brief_justification": "Excellent comprehensive answer with accurate UTC calculations, clear timezone conversions, and thorough DST analysis. Minor deduction for the abrupt ending (appears cut off) and slightly dense table formatting, but otherwise exemplary in addressing all aspects of this complex scheduling problem."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 9.8,
      "brief_justification": "The response provides perfectly accurate calculations for all time zones and dates, including the critical date line crossing for San Francisco. The DST analysis is thorough and correctly explains the complex interactions between different DST schedules, though it could have been slightly more specific about exact dates of DST changes."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 8.8,
      "brief_justification": "Excellent response with accurate timezone calculations, proper date line handling, and thorough DST analysis. Minor ambiguity in 'next Tuesday' interpretation acknowledged appropriately, and DST explanation could be slightly clearer about the specific transition periods."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 9.55,
      "brief_justification": "Excellent response with accurate calculations, clear explanations of date line crossings, and comprehensive DST analysis. Minor point: the UTC calculation explanation could be slightly clearer about why 15:00-13 hours equals 02:00 same day, but overall exceptionally thorough and practical."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 8.8,
      "brief_justification": "The response provides accurate UTC conversion, correct local times for all participants, and properly identifies date line crossings. The DST analysis is thorough and practical, though could slightly expand on specific recurring meeting scenarios."
    },
    {
      "judge_key": "claude_sonnet",
      "judge_name": "Claude Sonnet 4.5",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 9.8,
      "brief_justification": "The response is exceptionally thorough and accurate, correctly calculating all UTC conversions, local times, and dates including date line effects. It provides comprehensive DST analysis with both scenarios (fixed local vs fixed UTC time) and practical recommendations for handling recurring meetings across time zones."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 8.8,
      "brief_justification": "Response correctly computes UTC/local times and dates with proper date line handling, and reasonably addresses DST impacts with accurate examples. It is clear and thorough, though minor nuances about recurrence rules could be expanded."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "No response was provided to evaluate, so none of the required information was addressed."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 7.9,
      "brief_justification": "The core conversion for the initial meeting is correct, but several DST examples mis-handle San Francisco’s offset (PDT vs PST), leading to incorrect local times in those scenarios. Otherwise, coverage and structure are strong and actionable."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 8.25,
      "brief_justification": "The response correctly computes the UTC time, local times, and dates with proper date line crossing, and the DST discussion is largely accurate. It is mostly complete and clear, though it ends abruptly and could tighten some DST implications."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 7.35,
      "brief_justification": "The date/time conversions for the specific meeting are correct and clearly presented, but the DST recurrence analysis is flawed because it assumes SF DST shifts the UTC time rather than anchoring to the organizer’s local time or a fixed UTC. Overall coverage is good with clear structure."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 9.45,
      "brief_justification": "Times and dates are computed correctly with proper UTC conversions and date changes, and DST implications are accurately discussed. The response is clear and thorough, with practical guidance for recurring meetings."
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 9.45,
      "brief_justification": "All calculations and DST scenarios are accurate and fully address the questions, presented clearly with tables and practical advice, though minor wording could be tighter."
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 9.25,
      "brief_justification": "All time conversions and DST explanations are accurate and well presented; minor omissions of exact DST transition dates keep it from being perfect."
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 9.05,
      "brief_justification": "All time conversions and dates are accurate and the answer addresses each question, with clear tables and explanations; it could include exact DST transition dates for deeper insight."
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 7.6,
      "brief_justification": "The answer correctly computes the UTC time and local times/dates, and is clearly presented, but its DST analysis misstates how UTC shifts when only participant time zones change, reducing depth and overall usefulness."
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 10,
      "brief_justification": "The response is perfectly accurate, accounting for the International Date Line and the specific UTC offsets provided. It provides a clear breakdown of the DST transitions and offers two scenarios for recurrence, which is highly insightful for global scheduling."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "The model provided an empty response, failing to address any part of the prompt."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 10,
      "brief_justification": "The response is perfectly accurate, handling the complex time zone conversions and date line crossings without error. It provides a comprehensive analysis of DST transitions and offers practical advice for recurring meetings."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 10,
      "brief_justification": "The response is perfectly accurate, handling the date line crossing for San Francisco correctly and providing a clear breakdown of how DST changes affect recurring meetings depending on the anchor timezone."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 9.6,
      "brief_justification": "The response is factually accurate, correctly identifying the UTC time and the date line crossing for San Francisco. It provides a detailed analysis of how DST shifts affect each participant, though the text cuts off slightly at the very end."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 9.8,
      "brief_justification": "The response is perfectly accurate in its time zone conversions and date line handling. It correctly identifies that San Francisco is on the previous calendar day and provides a sophisticated explanation of how DST transitions in different hemispheres affect recurring meetings."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 10,
      "brief_justification": "The response is perfectly accurate. It correctly identifies the UTC time, handles the date line crossing for San Francisco, and provides a sophisticated analysis of how DST shifts in different hemispheres will affect the recurrence for all parties."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate, correctly calculating the UTC time and local times for all participants while accounting for the date line. It provides a thorough explanation of how DST transitions in different regions will affect the meeting time for each participant."
    },
    {
      "judge_key": "gemini_3_flash",
      "judge_name": "Gemini 3 Flash Preview",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 10,
      "brief_justification": "The response is perfectly accurate and highly detailed. It correctly identifies the date line crossing for San Francisco, provides the exact UTC conversion, and offers a comprehensive analysis of how DST transitions in different hemispheres affect a recurring schedule."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 10,
      "brief_justification": "The response provides perfectly accurate calculations for all time zones and dates, thoroughly addresses the DST scenarios, and offers clear, actionable recommendations."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "No response was provided to evaluate, so all criteria are scored as zero."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 10,
      "brief_justification": "The response is factually perfect, comprehensively addresses all parts of the question, is exceptionally well-structured and clear, provides deep analysis of DST scenarios, and offers highly practical, actionable recommendations."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate, covers all parts of the question thoroughly, presents information clearly with tables, and provides practical insights into DST impacts, though the depth could slightly increase with explicit shift date examples."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate, thoroughly addresses all parts of the question with precise calculations and time zone logic, and provides insightful analysis of DST impacts, though the clarity is slightly reduced by minor formatting inconsistencies."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 10,
      "brief_justification": "The response is factually perfect, addresses all parts of the question with precise calculations, is exceptionally clear and well-structured, provides insightful analysis of DST impacts, and offers highly practical guidance for managing recurring international meetings."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 10,
      "brief_justification": "The response is factually perfect, thoroughly addresses all parts of the question including DST complexities, is exceptionally clear and well-structured, provides deep analysis of time zone interactions, and offers highly practical, actionable information for scheduling."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 9.6,
      "brief_justification": "The response is factually accurate, clearly structured, and provides actionable insights, though it could briefly mention the exact DST transition dates for San Francisco to achieve perfect completeness."
    },
    {
      "judge_key": "deepseek_v3",
      "judge_name": "DeepSeek V3.2",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate, thoroughly addresses all parts of the question including DST complexities, and provides actionable recommendations, though the structure could be slightly more concise."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 9.35,
      "brief_justification": "The response is highly accurate, exceptionally clear, and extremely practical. It correctly identifies the date line crossing for San Francisco and provides a thorough analysis of DST impacts. Minor deduction in correctness for a small calculation error in the DST scenario table (NZ time should be 1 PM not 2 PM after fall back), but the overall logic is sound."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 8.8,
      "brief_justification": "The response correctly calculates all time conversions and identifies the date line crossing for India. It provides a thorough explanation of the DST issue, though it could briefly mention the specific dates for US DST changes to be more complete."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 9.35,
      "brief_justification": "The response is highly accurate and exceptionally well-structured with clear tables and scenarios. Minor deduction in correctness for not explicitly verifying the exact date of 'next Tuesday' from Sunday Dec 15 (though Dec 17 is correct), and completeness for not mentioning that India does not observe DST at all, making their time permanently fixed. The DST analysis is particularly insightful and actionable."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 9.55,
      "brief_justification": "The response is highly accurate, providing precise UTC and local times with correct date line handling. It thoroughly addresses all four parts of the question, including a nuanced explanation of DST impacts based on two different meeting definitions. The formatting is exceptionally clear and easy to follow."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 8.8,
      "brief_justification": "The response is highly accurate and provides a thorough breakdown of time conversions, date line crossings, and DST impacts. The only minor deduction is for a slightly confusing table header in the DST section that implies NZ's offset changes when the US changes, but the subsequent text and calculations are correct."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 9.35,
      "brief_justification": "The response correctly calculates the UTC time and local times, including the critical date line crossing for San Francisco. The analysis of DST impacts is nuanced and accurate, correctly identifying the specific shifts for each region. The only minor deduction is for not explicitly stating the date for San Francisco is Monday, though it is implied by the time calculation."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 9,
      "brief_justification": "The response correctly calculates the UTC time and local times, accurately noting the date line crossing for San Francisco. The analysis of DST impacts is mostly correct but misses the opportunity to explicitly state the final stable weekly time difference after both regions have adjusted their clocks."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 8.55,
      "brief_justification": "The response correctly calculates the UTC time and local times for the participants, accurately identifying the date line crossing for San Francisco. However, there is a minor error in the DST analysis for New Zealand, as DST typically ends in April, not early April, and the specific dates could be more precise. The explanation of weekly recurrence and DST impact is thorough and practical, offering clear warnings and advice."
    },
    {
      "judge_key": "mimo_v2_flash",
      "judge_name": "MiMo-V2-Flash",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 9.75,
      "brief_justification": "The response is highly accurate, providing precise calculations for UTC and local times, correctly identifying the date shift for San Francisco, and offering a comprehensive, nuanced analysis of DST impacts with practical recommendations."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 10,
      "brief_justification": "The response is factually precise on all time calculations, date crossings, and DST transitions, with thorough coverage using clear tables and scenarios. It adds practical depth through recurrence analysis and actionable recommendations."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "No response provided after 'Response to evaluate:', resulting in failure to address any part of the question."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 10,
      "brief_justification": "The response is factually precise with accurate time conversions, date line handling, and DST analysis; it comprehensively addresses all questions using clear tables and structure, offers insightful scenarios on recurring meetings, and provides highly practical recommendations."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 10,
      "brief_justification": "The response is factually precise on all time conversions, dates, and date-line effects, thoroughly covers recurrence ambiguities and DST impacts with insightful dual interpretations, and presents everything in highly structured, actionable tables and summaries."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually precise on times, dates, and DST effects, thoroughly addressing all questions with structured tables and scenarios, though slightly incomplete at the end; it offers deep insights and actionable advice."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate with precise UTC and local time calculations, including date line crossings, and thoroughly covers all questions. It provides clear structure via tables and sections, with insightful DST analysis for recurring meetings, though slightly more specific DST transition dates could enhance depth."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 10,
      "brief_justification": "The response is factually precise on times, dates, and DST transitions, fully covers all questions with structured steps and a summary table, and offers insightful analysis of recurrence issues across time zones."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 10,
      "brief_justification": "The response is factually accurate, thoroughly addresses all questions including date line crossings and DST scenarios with precise calculations, and presents information clearly via steps, table, and insightful analysis for practical use."
    },
    {
      "judge_key": "grok_4_1_fast",
      "judge_name": "Grok 4.1 Fast",
      "respondent_key": "grok_direct",
      "respondent_name": "Grok 3 (Direct)",
      "weighted_score": 10,
      "brief_justification": "The response is factually accurate in all time conversions, date calculations, and DST rules, while comprehensively covering all questions with structured clarity, deep analysis of recurrence ambiguities, and highly practical recommendations."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 9.6,
      "brief_justification": "The response is factually accurate, covers all aspects of the question including DST impacts, and provides clear calculations and recommendations. Minor clarity deduction for dense formatting in some sections."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "No response content was provided for evaluation, resulting in zero scores across all criteria."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 9.2,
      "brief_justification": "The response is highly accurate with detailed calculations for UTC and local times, thorough coverage of DST impacts, and clear structuring. Minor deduction for correctness due to a small risk of misinterpretation in date line crossing explanation."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 9.65,
      "brief_justification": "The response is accurate, thorough, and clearly structured, addressing all aspects of the question including DST impacts. It offers practical insights, though exact DST shift dates could enhance depth and usefulness further."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 9.25,
      "brief_justification": "The response is factually accurate with precise UTC and local time calculations, covers all aspects of the question including DST impacts, and is clearly structured with detailed tables. Minor incompleteness in the practical recommendation section due to an unfinished sentence."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 8.8,
      "brief_justification": "The response is highly accurate, thorough, and clear in addressing time zone conversions and DST impacts, though the depth of DST analysis could include more specific examples of calendar software behavior."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 9.05,
      "brief_justification": "The response is factually accurate with precise UTC and local time calculations, covers all aspects of the question including DST impacts, and is clearly structured. Minor depth could be added on specific DST mismatch periods, but overall highly useful."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "mimo_v2_flash",
      "respondent_name": "MiMo-V2-Flash",
      "weighted_score": 9.6,
      "brief_justification": "The response is factually accurate with precise calculations for UTC and local times, covers all aspects of the question including DST impacts, and is clearly structured with minor complexity in DST explanations."
    },
    {
      "judge_key": "grok_direct",
      "judge_name": "Grok 3 (Direct)",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 8.8,
      "brief_justification": "The response is accurate in calculating UTC and local times, thorough in addressing all questions including DST impacts, and clearly structured. Depth is slightly limited as DST transition dates are approximate and could be more precise."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "deepseek_v3",
      "respondent_name": "DeepSeek V3.2",
      "weighted_score": 8,
      "brief_justification": "The time conversions and dates are correct, and the structure is clear. DST discussion is mostly accurate but misses the post-NZ DST shift local times (e.g., SF becoming 8 PM PDT), slightly reducing completeness and correctness."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "gemini_3_pro",
      "respondent_name": "Gemini 3 Pro Preview",
      "weighted_score": 0,
      "brief_justification": "No response was provided to evaluate. The model failed to generate any answer to the timezone conversion question."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "claude_sonnet",
      "respondent_name": "Claude Sonnet 4.5",
      "weighted_score": 9.75,
      "brief_justification": "The response demonstrates excellent accuracy in timezone calculations, properly handles the date line crossing for San Francisco, and provides comprehensive analysis of DST implications. The tables are clear, the scenarios are well-explained, and practical recommendations are included. Minor deduction for not explicitly verifying the exact 2025 DST transition dates, though the approximations given are reasonable."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "gpt_codex",
      "respondent_name": "GPT-5.2-Codex",
      "weighted_score": 9.8,
      "brief_justification": "The response is factually accurate with correct UTC conversion, proper date-line crossing identification for San Francisco, and precise local times for all participants. It thoroughly addresses all four questions with excellent clarity using tables and clear formatting. The DST analysis covers both fixed-local and fixed-UTC scenarios comprehensively, making it highly practical and actionable."
    },
    {
      "judge_key": "claude_opus",
      "judge_name": "Claude Opus 4.5",
      "respondent_key": "gpt_oss_120b",
      "respondent_name": "GPT-OSS-120B",
      "weighted_score": 9,
      "brief_justification": "The response correctly calculates UTC time (02:00 UTC on Dec 17), accurately converts to all local times with proper date line handling (SF on Monday Dec 16), and provides thorough DST analysis. The explanation of how recurring meetings shift with DST changes is comprehensive and well-organized with clear tables. Minor deduction for the truncated ending and one small error in the DST table where SF times after US DST change should show the same clock time, not later."
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "gemini_3_flash",
      "respondent_name": "Gemini 3 Flash Preview",
      "weighted_score": 8.8,
      "brief_justification": "The response correctly computes the UTC time and local dates/times, including date line effects, and gives a mostly accurate DST recurrence explanation. It is clear and well structured, though DST nuances could be slightly more precise."
    },
    {
      "judge_key": "gemini_3_pro",
      "judge_name": "Gemini 3 Pro Preview",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gpt_codex",
      "judge_name": "GPT-5.2-Codex",
      "respondent_key": "grok_4_1_fast",
      "respondent_name": "Grok 4.1 Fast",
      "weighted_score": 0,
      "brief_justification": ""
    },
    {
      "judge_key": "gpt_oss_120b",
      "judge_name": "GPT-OSS-120B",
      "respondent_key": "claude_opus",
      "respondent_name": "Claude Opus 4.5",
      "weighted_score": 0,
      "brief_justification": ""
    }
  ],
  "meta": {
    "source": "The Multivac (app.themultivac.com)",
    "methodology": "10x10 blind peer matrix evaluation",
    "criteria": "correctness, completeness, clarity, depth, usefulness",
    "self_judgments": "excluded from rankings",
    "license": "Open data — cite as: The Multivac (2026)"
  }
}