{ "evaluation_id": "EVAL-20260402-195829", "question_id": "ANALYSIS-018", "question_text": "A 5-year-old codebase has: 45% test coverage, 200 known bugs (50 critical), 15 engineers maintaining it, average deployment takes 4 hours, 3 production incidents/month. A complete rewrite is estimated at 12 months with 8 engineers. (1) Should you rewrite or refactor incrementally? (2) Calculate the cost of technical debt using downtime and developer productivity. (3) Design a 6-month plan that reduces critical bugs by 80% without a rewrite. (4) When IS a rewrite justified?", "category": "analysis", "timestamp": "2026-04-02T19:58:29.258Z", "display_date": "Apr 02, 2026", "winner": { "name": "Grok 4.20", "provider": "openrouter", "score": 9.14 }, "avg_score": 7.918, "matrix_size": 87, "models_used": [ { "id": "grok_420", "name": "Grok 4.20", "provider": "openrouter" }, { "id": "gpt_5_4", "name": "GPT-5.4", "provider": "openrouter" }, { "id": "claude_opus_46", "name": "Claude Opus 4.6", "provider": "openrouter" }, { "id": "deepseek_v4", "name": "DeepSeek V4", "provider": "openrouter" }, { "id": "mimo_v2_flash", "name": "MiMo-V2-Flash", "provider": "Xiaomi" }, { "id": "claude_sonnet_46", "name": "Claude Sonnet 4.6", "provider": "openrouter" }, { "id": "gpt_oss_120b", "name": "GPT-OSS-120B", "provider": "OpenAI" }, { "id": "gemini_3_flash", "name": "Gemini 3 Flash Preview", "provider": "Google" }, { "id": "minimax_m25", "name": "MiniMax M2.5", "provider": "openrouter" }, { "id": "gemini_31_pro", "name": "Gemini 3.1 Pro", "provider": "openrouter" } ], "rankings": { "grok_420": { "display_name": "Grok 4.20", "provider": "openrouter", "average_score": 9.14, "score_count": 8, "min_score": 8.55, "max_score": 9.8, "rank": 1 }, "minimax_m25": { "display_name": "MiniMax M2.5", "provider": "openrouter", "average_score": 8.84, "score_count": 9, "min_score": 7.95, "max_score": 9.55, "rank": 2 }, "gpt_5_4": { "display_name": "GPT-5.4", "provider": "openrouter", "average_score": 8.52, "score_count": 9, "min_score": 7.35, "max_score": 9.6, "rank": 3 }, "gemini_3_flash": { "display_name": "Gemini 3 Flash Preview", "provider": "Google", "average_score": 8.39, "score_count": 9, "min_score": 7.75, "max_score": 9.2, "rank": 4 }, "gpt_oss_120b": { "display_name": "GPT-OSS-120B", "provider": "OpenAI", "average_score": 8.16, "score_count": 9, "min_score": 7, "max_score": 9.6, "rank": 5 }, "deepseek_v4": { "display_name": "DeepSeek V4", "provider": "openrouter", "average_score": 8.1, "score_count": 9, "min_score": 6.75, "max_score": 9.15, "rank": 6 }, "mimo_v2_flash": { "display_name": "MiMo-V2-Flash", "provider": "Xiaomi", "average_score": 7.39, "score_count": 9, "min_score": 5.8, "max_score": 9, "rank": 7 }, "claude_sonnet_46": { "display_name": "Claude Sonnet 4.6", "provider": "openrouter", "average_score": 7.34, "score_count": 8, "min_score": 3.4, "max_score": 9, "rank": 8 }, "claude_opus_46": { "display_name": "Claude Opus 4.6", "provider": "openrouter", "average_score": 7.04, "score_count": 9, "min_score": 4.45, "max_score": 8.8, "rank": 9 }, "gemini_31_pro": { "display_name": "Gemini 3.1 Pro", "provider": "openrouter", "average_score": 6.26, "score_count": 8, "min_score": 3.5, "max_score": 8.6, "rank": 10 } }, "judgments": [ { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 9.35, "brief_justification": "Comprehensive, accurate, and actionable response with strong analysis and clear recommendations." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 8.6, "brief_justification": "Strong, actionable advice with solid financial modeling and a detailed plan. Minor deduction for incompleteness in the plan (Month 5/6 and final metrics were cut off)." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 6.05, "brief_justification": "" }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 7.35, "brief_justification": "The response provides excellent, accurate, and well-structured advice with good depth, but it cuts off mid-sentence at Month 4 of the 6-month plan and fails to fully address the fourth question." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 9, "brief_justification": "The response effectively addresses all parts of the prompt with logical reasoning, realistic assumptions for calculations, and a highly actionable 6-month plan." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 6.55, "brief_justification": "The response provides excellent analysis and calculations for the first two prompts, but it cuts off abruptly during month 2 of the 6-month plan and fails to fully address the fourth prompt." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 7.35, "brief_justification": "The response provides excellent, accurate, and deep analysis for the first two questions with clear formatting. However, it is severely incomplete as it cuts off before addressing the 6-month plan and when a rewrite is justified." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 9.8, "brief_justification": "The response perfectly addresses all four prompts with industry-standard advice, realistic calculations, a highly actionable 6-month plan, and excellent formatting." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 7.3, "brief_justification": "The response provides excellent analysis, clear formatting, and logical calculations, but it is incomplete as it cuts off abruptly during the 6-month plan and lacks a detailed section for the fourth prompt question." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 9.2, "brief_justification": "The response is highly structured, accurate, and practical. It addresses all parts of the prompt with excellent industry-standard concepts and provides a realistic, actionable 6-month plan." }, { "judge_key": "gemini_31_pro", "judge_name": "Gemini 3.1 Pro", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 9.2, "brief_justification": "The response thoroughly addresses all parts of the prompt with sound logic, clear structure, and highly actionable advice. The technical debt calculation makes reasonable assumptions and the 6-month plan is practical." }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 6.1, "brief_justification": "The response starts strong with a well-reasoned argument for incremental refactoring and begins a solid cost calculation framework. However, it is clearly truncated mid-sentence during part 2, meaning parts 3 and 4 are entirely missing. This severely impacts completeness and usefulness. The content that IS present is accurate, well-structured, and shows good analytical thinking (Second System Fallacy, Split-Brain Problem), but missing 50%+ of the requested deliverables is a major gap. The cost c" }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 8.15, "brief_justification": "Excellent practical engineering response with clear reasoning, well-structured cost models with explicit assumptions, and a detailed month-by-month plan. The recommendation against rewriting is well-justified. The cost calculation methodology is sound, though necessarily based on assumptions given incomplete data - the response handles this transparently. The 6-month plan is actionable and realistic with good team allocation. Main weaknesses: the response appears truncated (Month 4 cuts off, and" }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 7.35, "brief_justification": "The response is well-structured and clearly communicated. However, the cost calculation in section (2) has issues: it conflates deployment time (4 hours) with incident downtime, which are different metrics. The calculation also makes assumptions without clearly separating them from given data, and the productivity loss estimate (20%) feels arbitrary without justification. The 6-month plan is practical but somewhat generic—it lacks specific resource allocation (how many of the 15 engineers on wha" }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 7, "brief_justification": "The response is well-structured and demonstrates solid reasoning on rewrite vs. refactor, with good use of industry references (Strangler Fig, Fowler). The cost calculation is detailed but relies on somewhat arbitrary assumptions (e.g., 80% debt attribution, $10k/hour downtime) without sufficient justification, and some math is questionable (e.g., deployment frequency assumed monthly seems low, context-switching hours seem high). The 6-month plan is promising but critically incomplete - it cuts " }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 7.2, "brief_justification": "The response is well-structured and visually clear with good frameworks, but has notable issues: (1) The cost calculations use arbitrary assumptions ($50k/hr revenue loss, $100k per feature) without acknowledging these are highly context-dependent, making the precision misleading. (2) The response is clearly cut off mid-sentence in Part 2 Category 4, and Parts 3 and 4 (the 6-month plan and when rewrites ARE justified) are completely missing - this is a major completeness failure as it only addre" }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 8.6, "brief_justification": "Strong, actionable advice with realistic cost modeling and a phased plan. Minor deduction for not explicitly calculating the cost of the rewrite for comparison." }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 9.55, "brief_justification": "Exceptionally thorough and well-structured response. The cost calculation is reasonable with clearly stated assumptions, though some line items (like the downtime engineering cost calculation showing 4 engineers × 8 hours per incident) could be questioned. The 6-month plan is highly actionable with realistic milestones and specific targets. The rewrite justification criteria are well-articulated. The strangler fig pattern recommendation is spot-on. Minor nit: the productivity tax and bug fixing " }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 8, "brief_justification": "The response is well-structured, clearly reasoned, and provides a solid decision matrix, quantitative cost analysis with explicit assumptions, and a concrete 6-month plan. The cost calculation is methodologically sound though relies on stated assumptions (e.g., $10k/hour downtime) that are acknowledged as estimates. The response appears truncated in Month 3-4 of the plan and likely missing Months 5-6 and the full 'When IS a rewrite justified' section, which hurts completeness. The rewrite vs. re" }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.35, "brief_justification": "The response is well-structured, practical, and demonstrates strong engineering judgment. The cost calculation is reasonable though relies on assumptions (60% waste, $150k salary, $10M revenue) that are stated but not deeply justified. The 6-month plan is actionable and realistic with good use of techniques like characterization tests and the Strangler Pattern. The rewrite justification criteria are solid. Minor weaknesses: the cost calculation could be more rigorous (e.g., the deployment cost m" }, { "judge_key": "claude_opus_46", "judge_name": "Claude Opus 4.6", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 8.75, "brief_justification": "The response is well-structured, clearly communicated, and covers all four parts thoroughly. The cost calculation is reasonable with stated assumptions, though some assumptions (like $10K/hour downtime and counting deployment time as downtime) could be questioned. The 6-month plan is practical and actionable with clear phases. The rewrite justification criteria are well-articulated. Minor weaknesses: the productivity cost estimate is likely too conservative (20% for a 200-bug codebase with 50 cr" }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 3.5, "brief_justification": "The response starts with a reasonable recommendation for incremental refactoring, but it is incomplete and cut off mid-calculation. It fails to answer the 6-month plan and rewrite-justification parts, and the technical debt calculation relies on unstated assumptions without finishing the analysis." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 4.45, "brief_justification": "The response gives a plausible high-level recommendation for incremental refactoring and some thoughtful framing, but it is incomplete: the technical debt cost calculation is only partially started, the 6-month plan is missing, and rewrite-justification criteria are not actually provided in the visible response. It is clearly written and structured, but relies on unsupported assumptions and estimates rather than calculating from the given data." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 6.75, "brief_justification": "Clear recommendation and a reasonable high-level plan, but the technical debt calculation relies on weak assumptions and incorrectly equates incident downtime with deployment time. It covers all parts of the question, though depth and rigor in costing and planning are moderate rather than strong." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 5.8, "brief_justification": "The response gives a reasonable high-level recommendation to refactor incrementally and offers some useful framing, but it contains notable calculation errors (e.g., 8 engineers × 12 months is 96 person-months, not 768), relies on many unstated assumptions for debt costing, and appears truncated before completing the 6-month plan and rewrite-justification criteria. Clear structure, but incomplete and partially inaccurate." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 8.55, "brief_justification": "Strong recommendation against rewrite is well-reasoned, and the 6-month plan is actionable and thorough. Cost calculation is pragmatic but relies on several unstated assumptions and includes some double-counting risk, so correctness is slightly limited." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 7, "brief_justification": "Well-structured and mostly sound in recommending incremental refactoring, with a reasonable debt-cost framework. However, the response is incomplete because the 6-month plan is cut off, key cost assumptions are invented without sensitivity analysis, and the rewrite-justification criteria are somewhat arbitrary." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 7.95, "brief_justification": "Strong recommendation for incremental refactoring with solid rationale and a practical 6-month plan. Clear and well-structured. Main weakness is the technical debt cost calculation relies on several unsupported assumptions (engineer cost, deployment frequency, downtime duration, revenue) rather than deriving from provided data, so correctness is only moderate." }, { "judge_key": "gpt_5_4", "judge_name": "GPT-5.4", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 7.95, "brief_justification": "Well-structured and generally sound recommendation toward incremental refactoring, with a practical 6-month plan and reasonable rewrite criteria. Main weakness is that the technical debt cost calculation relies heavily on unstated assumptions for downtime duration, deployment frequency, and revenue impact, so the numeric estimate is illustrative rather than rigorously derived from the given data." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 8.6, "brief_justification": "Accurate, thorough, and actionable with clear reasoning." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 8.65, "brief_justification": "Detailed and well-structured analysis with strong factual basis and practical insights." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 9, "brief_justification": "Comprehensive, well-structured, and practical with strong analysis." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 9, "brief_justification": "Comprehensive, well-structured, and actionable with strong depth and clarity." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 8.8, "brief_justification": "Comprehensive and detailed analysis with clear recommendations and calculations." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 9, "brief_justification": "Comprehensive, well-reasoned, and actionable with excellent depth and clarity." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 9, "brief_justification": "Comprehensive, data-driven, and actionable response with clear reasoning and structured plan." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.8, "brief_justification": "Comprehensive and insightful analysis with actionable recommendations." }, { "judge_key": "deepseek_v4", "judge_name": "DeepSeek V4", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 8.8, "brief_justification": "Highly accurate and thorough with insightful analysis, clear structure, and practical recommendations." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 7.8, "brief_justification": "Strong strategic reasoning and cost modeling, but incomplete response (missing parts 3 and 4)." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 8.15, "brief_justification": "Response is well-structured, accurate, and provides actionable insights, but incomplete as it cuts off mid-answer." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 8.1, "brief_justification": "Comprehensive analysis with strong structure and actionable insights, though some cost assumptions lack explicit sourcing." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 8.55, "brief_justification": "Response is factually sound, well-structured, and provides actionable plans with quantitative analysis, though some assumptions in cost calculation are not explicitly justified." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.6, "brief_justification": "Accurate analysis with practical plan and clear justification for rewrite criteria." }, { "judge_key": "mimo_v2_flash", "judge_name": "MiMo-V2-Flash", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 9.35, "brief_justification": "Comprehensive, accurate, and actionable response with clear structure and practical insights." }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 6.4, "brief_justification": "The response starts strong with good reasoning on the rewrite vs. refactor decision and begins a solid cost calculation framework. However, it is clearly incomplete - it cuts off mid-sentence during the cost calculation and never addresses parts 3 (6-month plan) and 4 (when is a rewrite justified). The content provided is accurate and well-structured, but the truncation severely impacts completeness, depth, and overall usefulness. The assumptions used are reasonable industry standards." }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 8.35, "brief_justification": "The response demonstrates strong analytical depth with well-structured frameworks, quantified comparisons, and practical code-based cost modeling. The rewrite risk matrix is particularly insightful and realistic. The response appears to be cut off mid-calculation, which reduces completeness. The salary assumptions and industry benchmarks are reasonable though not universally applicable. The visual formatting enhances clarity significantly. The Joel Spolsky reference and historical examples add c" }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 8.8, "brief_justification": "Excellent response with strong technical reasoning, well-structured cost modeling with explicit assumptions, and a detailed month-by-month plan. The recommendation against rewriting is well-justified with financial comparisons. Minor deductions for the truncated Month 4 section and some assumptions that could be better flagged as illustrative. The cost framework is practical and reusable. Overall highly actionable and analytically rigorous." }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 8.15, "brief_justification": "Well-structured response covering all four questions with practical recommendations. The cost calculations are reasonable with clear assumptions, though somewhat simplified (conflating deployment time with downtime, not accounting for incident duration separately). The 6-month plan is actionable and realistic. The rewrite justification criteria are solid. Could go deeper on the strangler fig pattern, risk mitigation strategies, and more nuanced cost modeling (e.g., opportunity cost, customer chu" }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 7.8, "brief_justification": "Strong structured response with solid reasoning on rewrite vs. refactor, reasonable cost calculations with transparent assumptions, and a practical month-by-month plan. The response is cut off before completing parts 3 and 4, which significantly hurts completeness. The debt calculations use sensible assumptions but some figures (e.g., 768 person-months math error: 8×12=96 not 768) show minor errors. Depth is good with references to Strangler Fig, Boy Scout Rule, and industry patterns. Would scor" }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 8.15, "brief_justification": "The response is well-structured, analytically sound, and highly practical. The decision matrix, cost calculations, and phased plan are clear and actionable. Minor deductions for the response being cut off before completing sections 3 and 4 (when a rewrite IS justified), which are explicitly asked for. The cost assumptions are reasonable but presented as more precise than they are. Overall, excellent depth and clarity for what was delivered." }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.55, "brief_justification": "Strong, well-structured response covering all four questions with practical depth. The incremental refactor recommendation is well-justified with Hofstadter's Law and Second System Effect references. Cost calculations are reasonable with clear assumptions, though the 60% waste estimate is asserted without derivation. The 6-month plan is actionable with concrete phases and measurable KPIs. The rewrite justification criteria are solid and pragmatic. Minor gaps: doesn't address the 8 vs 15 engineer" }, { "judge_key": "claude_sonnet_46", "judge_name": "Claude Sonnet 4.6", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 8.8, "brief_justification": "Comprehensive, well-structured response covering all four questions with solid reasoning. The cost calculations use reasonable assumptions and are clearly laid out. The 6-month plan is actionable with concrete phases and measurable targets. The rewrite justification criteria are practical and well-articulated. Minor gaps: deployment downtime calculation assumes the system is down during 4-hour deployments (not always true), and the 20% productivity loss assumption could be better justified. Over" }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 7.45, "brief_justification": "Strong reasoning on rewrite vs refactor and good cost assumptions, but response is incomplete as it cuts off mid-calculation and doesn't address parts 3 or 4 at all." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 7.4, "brief_justification": "The response provides a structured, insightful analysis with good use of examples, risk matrices, and a Python-based cost model. However, it is incomplete as it cuts off mid-calculation for Part 2 and does not address Parts 3 or 4 at all. Some assumptions (e.g., salaries, incident distributions) are reasonable but not fully justified by the given data." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 8.6, "brief_justification": "Response is factually sound with logical recommendations, provides thorough structured analysis across all four questions, communicates clearly with sections and calculations, offers insightful practical advice beyond basics, and delivers actionable plans with models and metrics." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 8, "brief_justification": "The response is factually sound with logical recommendations, covers all four questions thoroughly in a well-structured format, offers practical steps and metrics, but lacks deeper quantitative analysis or specific industry benchmarks for costs and timelines." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 7.8, "brief_justification": "Response is logically sound and well-structured with good use of industry practices. Calculations use reasonable assumptions but are incomplete (plan cuts off). Provides actionable advice with balanced analysis." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 7.8, "brief_justification": "Response is logically sound and well-structured with good use of frameworks and calculations. Some assumptions (e.g. $50k/hour revenue loss) are arbitrary without context. Covers all four questions but the rewrite justification section is cut off. Calculations are mostly transparent and actionable." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 8, "brief_justification": "The response is factually sound with logical recommendations and calculations. It covers most of the query but the 6-month plan is truncated mid-sentence. Communication is exceptionally clear and structured with tables and formulas. Provides insightful analysis on tradeoffs and practical steps." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 7.95, "brief_justification": "Response is logically sound with practical advice and reasonable estimates, though some assumptions (e.g., 60% waste, revenue impact) lack strong empirical backing. Covers all four questions thoroughly with clear structure and actionable insights." }, { "judge_key": "grok_420", "judge_name": "Grok 4.20", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 8.55, "brief_justification": "The response is factually sound with logical recommendations, covers all four questions thoroughly with structured reasoning and calculations, communicates clearly via sections and bullet points, provides insightful analysis on risks and tradeoffs, and offers highly actionable practical guidance." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 4.45, "brief_justification": "The response starts strong with clear reasoning for incremental refactoring, but it cuts off before completing cost calculations, the 6-month plan, and justification criteria, leaving key parts unanswered and reducing overall usefulness." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 5.25, "brief_justification": "The answer correctly recommends incremental refactoring and provides a detailed cost model, but it stops short of completing the technical debt calculation and entirely omits a 6-month bug-reduction plan and criteria for rewrite justification, limiting its overall completeness and practical utility." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 8.55, "brief_justification": "The answer correctly addresses all parts with reasonable assumptions, offers a clear structure, detailed cost modeling, and a practical 6‑month plan, providing actionable guidance." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 7.75, "brief_justification": "The response covers all required points with clear structure and actionable advice, though cost calculations rely on simplified assumptions and could be more rigorous." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 6.25, "brief_justification": "The response gives a solid recommendation and a plausible cost model, but the calculations rely on many unstated assumptions and the answer is truncated, missing a full 6-month plan and a dedicated discussion of when a rewrite is justified, reducing overall completeness and practical usefulness." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 3.4, "brief_justification": "The answer starts a solid rewrite vs refactor analysis but stops abruptly, missing the technical debt cost finalization, the 6-month plan, and the rewrite justification criteria. Calculations are partially shown and lack full context, reducing factual accuracy and practical value." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 8.55, "brief_justification": "Accurate reasoning and realistic cost assumptions; covers all four questions with detailed plan and criteria; clear structure and actionable recommendations." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 7.75, "brief_justification": "The answer addresses all parts with clear structure and actionable steps, though cost figures rely on rough assumptions and could be more precise." }, { "judge_key": "gpt_oss_120b", "judge_name": "GPT-OSS-120B", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 8.65, "brief_justification": "Accurate calculations, covers all questions, clear structure, good analysis of risks and actionable plan, useful guidance." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 8.8, "brief_justification": "The response is exceptionally clear and uses high-quality frameworks (Spolsky's Law, Risk Matrix) to answer the prompt. However, it is incomplete as it cuts off mid-calculation in Part 2 and fails to provide Parts 3 and 4 entirely." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 9.6, "brief_justification": "The response provides a highly professional and realistic engineering perspective. It correctly identifies that a rewrite is rarely the first choice, provides a logical mathematical model for technical debt cost, and designs a pragmatic, metrics-driven 6-month plan. It only slightly misses the final section (4) due to a cutoff, but the content provided is excellent." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 9.15, "brief_justification": "The response provides a highly professional and pragmatic approach to the classic build vs. buy/rewrite dilemma. The cost calculation uses logical assumptions, the 6-month plan is actionable and phased, and the criteria for a rewrite are industry-standard. It correctly identifies that a 12-month rewrite estimate is often optimistic and risky." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 9, "brief_justification": "The response provides a highly professional and structured analysis. It correctly identifies refactoring as the preferred path, provides a detailed (though slightly truncated at the very end) 6-month plan, and uses a logical framework for calculating the cost of technical debt. The depth of analysis regarding the 'Strangler Fig' pattern and the 'Boy Scout Rule' adds significant value." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 9, "brief_justification": "The response provides an exceptionally clear and structured analysis. It uses realistic financial modeling for technical debt and a strong decision matrix for the rewrite vs. refactor dilemma. It was cut off at the very end (Part 3 and 4 were partially or fully missing), which impacts completeness, but the quality of the provided sections is high." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 9.8, "brief_justification": "The response provides a highly professional, data-driven analysis of the rewrite vs. refactor dilemma. It correctly identifies the risks of a rewrite, provides a realistic financial model for technical debt, and outlines a pragmatic 6-month execution plan. The inclusion of the Strangler Fig pattern and specific success metrics adds significant practical value." }, { "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 exceptionally well-structured and provides a professional-grade analysis. It correctly identifies that a rewrite is rarely the answer for a 6-month goal, provides a logical (though assumption-based) cost model for technical debt, and outlines a highly actionable plan. The only minor omission is the cut-off text at the very end of the table, but the content provided is comprehensive." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "minimax_m25", "respondent_name": "MiniMax M2.5", "weighted_score": 9.55, "brief_justification": "The response provides a highly professional and structured analysis. It correctly identifies the Strangler Fig pattern, provides a logical (though assumption-based) financial model for tech debt, and offers a realistic 6-month roadmap. The criteria for a rewrite are well-defined and industry-standard." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "gemini_31_pro", "respondent_name": "Gemini 3.1 Pro", "weighted_score": 5.75, "brief_justification": "Sound advice on rewrite vs refactor and reasonable cost calculations, but response is truncated mid-sentence and fails to address parts 3 (6-month plan) and part 4 (when rewrite is justified), significantly reducing completeness and usefulness." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "claude_opus_46", "respondent_name": "Claude Opus 4.6", "weighted_score": 6.3, "brief_justification": "Well-structured analysis with good depth on rewrite vs refactor, but response is cut off mid-sentence - missing the 6-month plan entirely and incomplete on technical debt calculation and when rewrite is justified. The abrupt ending leaves critical parts unaddressed." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "gpt_5_4", "respondent_name": "GPT-5.4", "weighted_score": 8, "brief_justification": "Sound engineering advice with detailed cost modeling and actionable 6-month plan. Well-structured with clear reasoning. Minor gaps: incomplete ending in section 3, and 'when rewrite justified' could be more comprehensive. Assumptions clearly stated for cost calculations." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "deepseek_v4", "respondent_name": "DeepSeek V4", "weighted_score": 8.15, "brief_justification": "Well-structured response covering all four parts with sound recommendations. Technical debt calculations are reasonable though based on stated assumptions. The 6-month plan is practical and actionable with clear phases and metrics. Slight deduction for depth as some areas could benefit from more detailed analysis." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "mimo_v2_flash", "respondent_name": "MiMo-V2-Flash", "weighted_score": 7.3, "brief_justification": "Sound advice on refactoring vs rewriting with reasonable cost calculations. However, the response is incomplete - the 6-month plan cuts off mid-sentence in Month 2, leaving the critical bug reduction plan unfinished. This significantly impacts completeness and usefulness despite excellent clarity and depth in the sections that are fully developed." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "claude_sonnet_46", "respondent_name": "Claude Sonnet 4.6", "weighted_score": 7.05, "brief_justification": "Well-structured analysis with strong depth and clear cost calculations. However, the response is truncated and missing the 6-month plan (Part 3) and complete rewrite justification criteria (Part 4), significantly reducing completeness and usefulness." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "grok_420", "respondent_name": "Grok 4.20", "weighted_score": 8.55, "brief_justification": "Comprehensive response covering all four parts with well-reasoned advice. Cost calculations use realistic industry assumptions. The 6-month plan is detailed with specific targets and timelines. Clear criteria for when rewrite is justified. Well-structured with tables and actionable steps. Minor扣分 for some debatable assumptions in cost calculations." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "gpt_oss_120b", "respondent_name": "GPT-OSS-120B", "weighted_score": 7.8, "brief_justification": "Well-structured response with accurate technical debt calculations (~$1.2M/year), clear decision matrix favoring incremental refactor, and actionable 6-month plan. However, the response is truncated - the 6-month plan section ends abruptly mid-sentence, leaving the implementation details incomplete. The core analysis is solid but lacks full execution details." }, { "judge_key": "minimax_m25", "judge_name": "MiniMax M2.5", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.35, "brief_justification": "Comprehensive response covering all four parts with accurate technical advice, reasonable cost calculations, detailed actionable 6-month plan, and clear criteria for rewrite decisions. Well-structured with good use of formatting and relevant software engineering concepts." } ], "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)" } }