{ "evaluation_id": "EVAL-20260207-141537", "question_id": "CODE-006", "question_text": "Write comprehensive unit tests for this function. Cover all edge cases, including boundary conditions, error cases, and typical usage.\n\n```python\ndef merge_sorted_streams(*streams, max_items=None):\n \"\"\"\n Merge multiple sorted iterables into a single sorted output.\n \n Args:\n *streams: Variable number of sorted iterables\n max_items: Optional limit on total items to yield\n \n Yields:\n Items from all streams in sorted order\n \n Raises:\n ValueError: If any stream is not sorted\n \"\"\"\n import heapq\n \n heap = []\n iterators = [iter(s) for s in streams]\n \n # Initialize heap with first item from each stream\n for i, it in enumerate(iterators):\n try:\n item = next(it)\n heapq.heappush(heap, (item, i))\n except StopIteration:\n pass\n \n count = 0\n prev = None\n \n while heap and (max_items is None or count < max_items):\n item, stream_idx = heapq.heappop(heap)\n \n # Validate sorting\n if prev is not None and item < prev:\n raise ValueError(f\"Stream {stream_idx} is not sorted\")\n \n yield item\n prev = item\n count += 1\n \n # Get next item from same stream\n try:\n next_item = next(iterators[stream_idx])\n heapq.heappush(heap, (next_item, stream_idx))\n except StopIteration:\n pass\n```\n\nUse pytest. Include parametrized tests where appropriate.", "category": "code", "timestamp": "2026-02-17T00:00:00.000Z", "display_date": "Feb 17, 2026", "winner": { "name": "Grok Code Fast", "provider": "xAI", "score": 9.12 }, "avg_score": 6.838, "matrix_size": 90, "models_used": [ { "id": "claude_opus", "name": "Claude Opus 4.5", "provider": "Anthropic" }, { "id": "gemini_3_flash", "name": "Gemini 3 Flash Preview", "provider": "Google" }, { "id": "claude_sonnet", "name": "Claude Sonnet 4.5", "provider": "Anthropic" }, { "id": "gemini_3_pro", "name": "Gemini 3 Pro Preview", "provider": "Google" }, { "id": "minimax_m2", "name": "MiniMax M2", "provider": "MiniMax" }, { "id": "glm_4_7", "name": "GLM-4-7", "provider": "Zhipu" }, { "id": "grok_code_fast", "name": "Grok Code Fast", "provider": "xAI" }, { "id": "deepseek_v3", "name": "DeepSeek V3.2", "provider": "DeepSeek" }, { "id": "gpt_codex", "name": "GPT-5.2-Codex", "provider": "OpenAI" }, { "id": "grok_direct", "name": "Grok 3 (Direct)", "provider": "xAI" } ], "rankings": { "grok_code_fast": { "display_name": "Grok Code Fast", "provider": "xAI", "average_score": 9.12, "score_count": 7, "min_score": 8, "max_score": 9.8, "rank": 1 }, "gemini_3_flash": { "display_name": "Gemini 3 Flash Preview", "provider": "Google", "average_score": 9.07, "score_count": 6, "min_score": 8.6, "max_score": 9.8, "rank": 2 }, "grok_direct": { "display_name": "Grok 3 (Direct)", "provider": "xAI", "average_score": 8.48, "score_count": 8, "min_score": 7.4, "max_score": 9.8, "rank": 3 }, "claude_opus": { "display_name": "Claude Opus 4.5", "provider": "Anthropic", "average_score": 7.53, "score_count": 8, "min_score": 4.45, "max_score": 9.25, "rank": 4 }, "claude_sonnet": { "display_name": "Claude Sonnet 4.5", "provider": "Anthropic", "average_score": 7.46, "score_count": 8, "min_score": 5.65, "max_score": 8.6, "rank": 5 }, "deepseek_v3": { "display_name": "DeepSeek V3.2", "provider": "DeepSeek", "average_score": 7.3, "score_count": 7, "min_score": 3.8, "max_score": 9.8, "rank": 6 }, "minimax_m2": { "display_name": "MiniMax M2", "provider": "MiniMax", "average_score": 7.09, "score_count": 7, "min_score": 3, "max_score": 9.4, "rank": 7 }, "glm_4_7": { "display_name": "GLM-4-7", "provider": "Zhipu", "average_score": 6.1, "score_count": 7, "min_score": 0.7, "max_score": 9.8, "rank": 8 }, "gpt_codex": { "display_name": "GPT-5.2-Codex", "provider": "OpenAI", "average_score": 3.78, "score_count": 8, "min_score": 0.45, "max_score": 7.65, "rank": 9 }, "gemini_3_pro": { "display_name": "Gemini 3 Pro Preview", "provider": "Google", "average_score": 2.45, "score_count": 9, "min_score": 1, "max_score": 5.85, "rank": 10 } }, "judgments": [ { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 8.65, "brief_justification": "The tests are factually accurate and logically valid, covering many edge cases effectively, though completeness is reduced by missing explicit error case tests for unsorted streams and the incomplete response cutoff." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 9.8, "brief_justification": "The tests accurately cover the function's behavior, including sorting validation, max_items limits, and error handling, with no factual errors. They provide thorough coverage of edge cases, typical usage, and boundary conditions as requested, using parametrized tests effectively." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 8.6, "brief_justification": "The tests accurately cover most scenarios and edge cases for the function, with clear and structured code, but lack parametrized tests as requested and do not include tests for the ValueError exception on unsorted streams, reducing depth and completeness." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 2.9, "brief_justification": "The response outlines test categories accurately but fails to provide any actual test code, making it incomplete and largely useless for the task of writing unit tests." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 7.8, "brief_justification": "The tests accurately cover basic merging and edge cases but miss critical error handling for unsorted streams and have a minor syntax error in one assertion; they are well-structured and practical but lack parametrized tests as suggested and full coverage of error cases." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 2, "brief_justification": "The response does not attempt to answer the question about writing unit tests and instead provides unrelated instructions, making it factually incorrect and completely off-topic." }, { "judge_key": "gemini_3_pro", "judge_name": "Gemini 3 Pro Preview", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 0, "brief_justification": "" }, { "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": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 9.8, "brief_justification": "The test suite accurately covers the function's behavior with correct assertions and error handling, providing thorough coverage of edge cases, boundary conditions, and typical usage. It is well-structured and highly practical for validating the merge_sorted_streams function." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 5.55, "brief_justification": "The response provides correct and clear test code for basic cases, but it is incomplete, missing coverage for max_items limits, error cases, and full edge conditions as requested." }, { "judge_key": "grok_code_fast", "judge_name": "Grok Code Fast", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 9.1, "brief_justification": "The test suite is largely accurate and logically valid, covering the function's behavior well, but includes an incorrect test with a set iterable that assumes sorted order, which sets do not guarantee. It thoroughly covers edge cases, boundary conditions, and error scenarios with good structure and practical pytest usage." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 8, "brief_justification": "The tests cover most important scenarios including empty streams, typical merging, max_items limits, unsorted stream errors, and edge cases. However, there's a bug in the unsorted stream test case [[1, 2], [3, 1]] which wouldn't actually trigger the error since the sorting validation only checks within-stream ordering after items are yielded. The infinite stream test also has a flawed expected output. Good use of parametrization and clear organization, but missing some edge cases like negative numbers and floating point values." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.6, "brief_justification": "The tests are well-structured, correctly use pytest features including parametrization, and cover most important cases: basic functionality, edge cases (empty inputs, single stream), max_items boundaries, error handling, and generator support. Minor gaps include testing with negative numbers, very large datasets, and more thorough testing of the sorting validation logic across different stream configurations. The explanatory comments and key considerations section add practical value." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 7.45, "brief_justification": "The test suite is well-organized with clear categories and good coverage of basic functionality, empty streams, duplicates, and max_items parameter. However, the response is truncated mid-test, missing critical error case tests (unsorted stream validation), different data types (strings, floats), generator/iterator inputs, and parametrized tests as specifically requested in the prompt." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 1.7, "brief_justification": "The response is severely incomplete, cutting off mid-sentence after listing only 4 partial categories of tests. No actual test code is provided, making it impossible to evaluate correctness of implementation. The response fails to deliver the requested comprehensive unit tests with pytest and parametrized tests." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 7.65, "brief_justification": "The tests are well-organized with clear class groupings and good coverage of basic cases, edge cases, max_items, and data types. However, the response is truncated (cuts off mid-test), and critically missing are tests for the ValueError when streams are not sorted, tests with generators/iterators (not just lists), tests with strings or other comparable types, and parametrized tests as explicitly requested in the prompt." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 0.7, "brief_justification": "The response is completely empty - no unit tests were provided at all. The task asked for comprehensive pytest unit tests covering edge cases, boundary conditions, error cases, and typical usage with parametrized tests, but nothing was delivered." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 7.1, "brief_justification": "The response provides well-structured pytest tests with good coverage of basic functionality, max_items parameter, duplicates, and different length streams. However, the response is truncated mid-test, missing critical error case tests (unsorted streams), boundary conditions (negative max_items, single-element streams), type variation tests (strings, floats), and infinite stream tests. The parametrized tests mentioned in the prompt are also absent." }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "claude_opus", "judge_name": "Claude Opus 4.5", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 7.4, "brief_justification": "The test suite covers many important cases but has some issues: the unsorted stream test expects 'Stream 0' but the function tracks sorting across all streams (not per-stream), the set test is problematic since sets aren't ordered, and it misses testing strings/comparable objects, the case where unsorted items appear later in a stream, and max_items=None explicitly. Good organization and use of parametrize, but could be more thorough on edge cases." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 9.8, "brief_justification": "The response provides a comprehensive suite of pytest unit tests covering typical usage, edge cases, and error conditions. It correctly identifies the need for parametrization and even includes a clever test for infinite streams using the max_items parameter." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 9.25, "brief_justification": "The response provides high-quality, well-structured pytest code that covers basic functionality, empty inputs, single streams, and duplicate values. While the response appears to be cut off at the very end (missing the implementation of the uneven stream lengths class), the provided tests are correct and highly useful." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 8.45, "brief_justification": "The test suite is well-structured, covers most edge cases (empty streams, duplicates, max_items), and includes a logic-based validation for the sorting property. However, the response is truncated at the end, missing the actual implementation of the error case (ValueError for unsorted streams) which was specifically requested in the prompt." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 2.45, "brief_justification": "The response is severely incomplete, cutting off mid-sentence after the introduction and failing to provide any actual Python code or pytest unit tests as requested." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 8.6, "brief_justification": "The response provides a very high-quality set of unit tests covering typical usage, edge cases, and the max_items parameter. However, it loses points because the code is truncated at the very end (missing the closing bracket and the test for ValueError), and it failed to use pytest's parametrization as requested in the prompt." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 9.8, "brief_justification": "The provided unit tests are comprehensive, covering typical usage, empty inputs, the max_items limit, and the specific ValueError for unsorted streams using pytest. The use of parametrization and clear test cases makes the suite robust and easy to integrate." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 7.6, "brief_justification": "The response provides a very high-quality set of test cases covering many edge cases and typical usage. However, the response is cut off at the end, failing to complete the final test case for the ValueError, and it did not utilize pytest's @pytest.mark.parametrize as requested." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 3.3, "brief_justification": "The response is incomplete and cuts off mid-sentence, providing only a single basic test case and failing to include the promised error handling, boundary conditions, or full pytest implementation." }, { "judge_key": "gemini_3_flash", "judge_name": "Gemini 3 Flash Preview", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 9.8, "brief_justification": "The response provides a comprehensive and high-quality test suite using pytest. It correctly identifies all edge cases, including empty inputs, duplicate values, and the specific ValueError logic, while also demonstrating good testing practices like parametrization and testing different iterable types." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 8.8, "brief_justification": "Excellent comprehensive test suite covering edge cases, boundaries, and error conditions with proper parametrization. Minor deduction for the unsorted stream validation logic issue (the function only validates when items are yielded, not when pushed to heap) and the infinite stream test expectation may not match actual behavior due to heap ordering." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 8.25, "brief_justification": "The response provides well-structured, comprehensive unit tests covering many edge cases including empty inputs, single streams, duplicates, and uneven lengths. However, it appears incomplete (cuts off mid-test) and is missing critical test cases for error validation (unsorted streams), max_items parameter, boundary conditions, and different data types." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 9, "brief_justification": "Excellent comprehensive test suite covering edge cases, boundary conditions, error handling, and various data types. Minor deduction for not testing negative max_items and the specific error message format more thoroughly, but overall exceptionally well-structured and practical." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 1.65, "brief_justification": "The response is incomplete - it only provides a description of what tests should cover but doesn't include any actual test code. The question explicitly asked for comprehensive unit tests using pytest, but none were delivered." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 4.55, "brief_justification": "The response is incomplete (cuts off mid-test) and has a critical bug: the sorting validation logic is flawed because it only checks within-stream sorting after items are already merged, not before. Missing tests for unsorted streams (the main error case), generators/iterators, and string data types." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 3.45, "brief_justification": "The response is completely missing - no unit tests were provided at all. While the question was clear and well-structured, without any actual test code, the response fails on correctness, completeness, depth, and usefulness despite being easy to understand what was requested." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 8, "brief_justification": "The test suite is well-structured with good coverage of basic functionality, edge cases, and parametrized scenarios. However, the response is truncated mid-test, missing critical error case tests and some boundary conditions like negative numbers and mixed types." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 2.65, "brief_justification": "The response is incomplete - it cuts off mid-test function and only shows the beginning of a parametrized test. While the structure appears correct for what's shown, it fails to deliver the comprehensive test suite promised, missing edge cases, error handling tests, and most functionality." }, { "judge_key": "claude_sonnet", "judge_name": "Claude Sonnet 4.5", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 7.8, "brief_justification": "The test suite is well-structured and covers most scenarios correctly, but has a critical flaw: the unsorted stream validation logic in the original function only checks across merged items, not within individual streams, so tests expecting ValueError for unsorted streams may not trigger as written. The suite is clear, practical, and covers edge cases well, though it could benefit from testing string comparisons and more complex unsorted scenarios." }, { "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": "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": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "gemini_3_pro", "judge_name": "Gemini 3 Pro Preview", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "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": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 0.45, "brief_justification": "The response is severely truncated and cuts off mid-sentence before providing any functional test code, making it completely unusable." }, { "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": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 9, "brief_justification": "Comprehensive pytest suite with excellent parametrized test coverage for typical usage, edge cases, boundary conditions, and error scenarios. Well-structured and documented. Minor gap: could test negative max_items behavior." }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 5.45, "brief_justification": "Tests that exist are well-structured and correct, but the response is incomplete - it cuts off mid-class and misses critical test categories including max_items boundary tests, error cases for unsorted streams, different data types, and generator testing." }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 5.65, "brief_justification": "Tests are well-organized with good coverage of basic cases, empty streams, duplicates, and max_items. However, the response is cut off (last test incomplete), missing critical error case tests for unsorted streams (ValueError), and lacks parametrized tests as requested. Also missing tests for different data types, generators, and edge cases like negative numbers." }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 1, "brief_justification": "Response is incomplete - it only provides an introduction describing what tests would be covered but contains no actual test code whatsoever" }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 8.8, "brief_justification": "Comprehensive pytest suite covering typical usage, edge cases (empty/single streams), boundary conditions (max_items values), and error cases (unsorted streams). Well-structured with parametrized tests and clear assertions." }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 6.2, "brief_justification": "Test suite is well-organized with good structure and clear naming, but the response is incomplete (last test case is cut off mid-implementation). Missing some edge cases like negative numbers, floats, strings, and custom objects. Could benefit from more parametrized tests for similar scenarios." }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 3.65, "brief_justification": "Response is incomplete - cuts off mid-function definition. Shows basic parametrized tests but missing critical test cases for max_items, error handling, boundary conditions, and the unsorted detection issue mentioned in the intro." }, { "judge_key": "minimax_m2", "judge_name": "MiniMax M2", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 8.6, "brief_justification": "Comprehensive pytest suite covering typical usage, edge cases, and error scenarios with good organization and parametrized tests. Minor gap: could include tests for unsorted elements appearing mid-stream and string/comparable type handling." }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 9.35, "brief_justification": "Excellent test coverage with well-organized parametrized tests covering typical usage, max_items functionality, error cases, and edge conditions including generators and simulated infinite streams. The code is clear, properly structured, and provides practical validation for all specified requirements." }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 6.35, "brief_justification": "Tests are well-structured with clear organization and good coverage of basic functionality, empty inputs, single streams, and duplicates. However, the response is incomplete - cuts off mid-sentence and misses critical test cases for unsorted streams (ValueError), max_items boundary conditions, infinite streams, and uneven stream lengths." }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 6.85, "brief_justification": "The test suite is well-organized with clear sections and descriptive test names, covering basic functionality, empty streams, duplicates, and max_items parameter. However, it's incomplete (cuts off mid-test), missing critical error case tests for unsorted streams (ValueError), and lacks tests for different data types and generator inputs." }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 1, "brief_justification": "The response is incomplete and truncated after listing test categories. No actual unit test code was provided, making it impossible to evaluate the quality of the tests themselves." }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 2.5, "brief_justification": "The response is incomplete - it cuts off mid-function definition after showing only a basic parametrize decorator with 4 test cases. Missing all error case tests, max_items tests, boundary conditions, and the promised test about undetected unsorted streams." }, { "judge_key": "glm_4_7", "judge_name": "GLM-4-7", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 8.8, "brief_justification": "Excellent test suite with clear organization, proper use of pytest features, and comprehensive coverage of typical usage, edge cases, and error scenarios. Minor issues: stream3 is defined but unused in test_different_iterables, and some edge cases like non-comparable items, strings, or mixed types are not tested." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 9.55, "brief_justification": "The tests are thorough and well-structured, effectively covering typical usage, edge cases, and error conditions with practical pytest implementations." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 9.2, "brief_justification": "The tests are factually correct, well-structured, and cover a wide range of edge cases including empty streams, duplicates, and single streams, but they lack tests for the max_items parameter, error cases (unsorted streams), and infinite streams, which slightly reduces completeness and depth." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 9.6, "brief_justification": "The tests are factually accurate, cover all edge cases thoroughly, and are highly practical for implementation, though the explanation could be slightly more structured." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 8.25, "brief_justification": "The tests are well-structured and cover many important cases, but they are incomplete (the final test is cut off) and lack parametrization and tests for the ValueError on unsorted input, which was explicitly requested." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 5.85, "brief_justification": "The response correctly identifies key test categories but is incomplete as it cuts off mid-sentence and lacks any actual test code, resulting in low completeness, depth, and usefulness scores." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 9.4, "brief_justification": "The tests are factually correct, well-structured, and highly practical, covering typical usage, edge cases, max_items, and data types comprehensively, though they lack explicit tests for the ValueError on unsorted streams." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 9.35, "brief_justification": "The response provides thorough, well-structured pytest unit tests covering all requested aspects, including edge cases, boundaries, errors, and typical usage with appropriate parametrization, making it highly practical and actionable." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 7.65, "brief_justification": "The response correctly begins structuring a pytest suite with parametrized tests and mentions key test cases, but it is incomplete—the test function body is missing, and important edge cases like max_items and unsorted stream validation are not fully implemented." }, { "judge_key": "deepseek_v3", "judge_name": "DeepSeek V3.2", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 8.6, "brief_justification": "The test suite is highly correct, clear, and useful, covering many important cases, but it misses a few edge cases like streams with None values or custom objects, and the test for sets is flawed since sets are unordered." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 0, "brief_justification": "" }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 4.45, "brief_justification": "The provided tests are generally valid but the response is truncated mid-suite and lacks many required edge/error cases (e.g., unsorted streams, max_items behavior). Structure and readability are decent, but the incompleteness limits practical usefulness." }, { "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 tests correctly exercise typical usage, edge cases, max_items behavior, generators, and error conditions with clear assertions. Minor gaps include untested negative max_items or custom comparators, but overall coverage and structure are strong." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 5.85, "brief_justification": "The tests cover many basic and edge cases, but the response is truncated (incomplete test) and lacks required parametrization, reducing correctness and usefulness. Overall structure is clear but not fully comprehensive as requested." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 1, "brief_justification": "The response does not provide any actual unit tests or pytest code, only a partial outline, so it fails to satisfy the request for comprehensive tests and is largely unusable." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 3, "brief_justification": "The test code is truncated and syntactically invalid, so it would not run, and it omits key error-case coverage (unsorted stream) and parametrization. While it includes many basic and edge tests, the incompleteness and invalidity greatly reduce correctness and usefulness." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 0, "brief_justification": "No response or tests were provided to evaluate against the prompt." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 3.8, "brief_justification": "The response is truncated mid-test and thus syntactically incomplete, missing key error-case coverage and any parametrization. While some typical and edge cases are listed, the suite is not comprehensive or runnable as provided." }, { "judge_key": "gpt_codex", "judge_name": "GPT-5.2-Codex", "respondent_key": "grok_direct", "respondent_name": "Grok 3 (Direct)", "weighted_score": 7.75, "brief_justification": "The suite is broad and well-structured, but at least one test is incorrect: the expected error message in test_multiple_unsorted_streams should reference stream 1, not 0. Overall coverage is strong and practical, with clear pytest usage." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "grok_code_fast", "respondent_name": "Grok Code Fast", "weighted_score": 9.35, "brief_justification": "The response provides accurate and comprehensive unit tests covering typical usage, edge cases, and error conditions with pytest. It is well-structured and highly useful, though minor improvements in comments could enhance clarity." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "claude_opus", "respondent_name": "Claude Opus 4.5", "weighted_score": 8.6, "brief_justification": "The response provides a well-structured set of unit tests covering many edge cases and typical usage scenarios for the merge_sorted_streams function, though it is incomplete as some test classes (e.g., TestUnevenStreamLengths) are cut off. The tests are clear, logically valid, and useful for practical implementation." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "gemini_3_flash", "respondent_name": "Gemini 3 Flash Preview", "weighted_score": 8.6, "brief_justification": "The response provides accurate and comprehensive unit tests covering most edge cases and typical usage, with clear organization. Minor gaps in testing complex error scenarios prevent perfect scores." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "claude_sonnet", "respondent_name": "Claude Sonnet 4.5", "weighted_score": 8.6, "brief_justification": "The response provides a thorough set of unit tests covering various cases including edge cases, boundary conditions, and typical usage with clear test names. Minor issues include incomplete last test function and lack of explicit error case testing for unsorted streams." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "gemini_3_pro", "respondent_name": "Gemini 3 Pro Preview", "weighted_score": 4.5, "brief_justification": "The response starts to outline a test plan but lacks actual test code or detailed implementation, making it incomplete and less useful. It has a basic structure but misses depth and full coverage of edge cases." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "minimax_m2", "respondent_name": "MiniMax M2", "weighted_score": 8.6, "brief_justification": "The response provides a comprehensive set of unit tests covering various scenarios including edge cases and typical usage, though it misses some error cases like unsorted streams. The tests are well-organized and mostly clear, with good practical value." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "glm_4_7", "respondent_name": "GLM-4-7", "weighted_score": 8.6, "brief_justification": "The response provides accurate and relevant unit tests for the merge_sorted_streams function, covering most edge cases and using pytest effectively. It lacks a few minor edge cases like extremely large inputs or mixed data types, but overall is clear and useful." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "deepseek_v3", "respondent_name": "DeepSeek V3.2", "weighted_score": 8.6, "brief_justification": "The response provides a thorough set of unit tests covering various scenarios including empty streams, max_items parameter, duplicates, and error cases. It misses a complete test for infinite streams and has a minor incomplete test case at the end." }, { "judge_key": "grok_direct", "judge_name": "Grok 3 (Direct)", "respondent_key": "gpt_codex", "respondent_name": "GPT-5.2-Codex", "weighted_score": 4.5, "brief_justification": "The response starts with a promising structure for unit tests using pytest, but it is incomplete and lacks full implementation of test cases. It misses critical edge cases, error handling tests, and boundary conditions beyond basic scenarios." } ], "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)" } }