{ "evaluation_id": "EVAL-20260315-033810", "question_id": "EVAL-20260315-033810", "question_text": "This Go code processes orders concurrently but occasionally produces incorrect totals. Find and fix all concurrency issues.\n\n```go\npackage main\n\nimport (\n \"fmt\"\n \"sync\"\n)\n\ntype OrderProcessor struct {\n totalRevenue float64\n orderCount int\n errors []string\n}\n\nfunc (op *OrderProcessor) ProcessOrder(amount float64, wg *sync.WaitGroup) {\n defer wg.Done()\n\n if amount <= 0 {\n op.errors = append(op.errors, fmt.Sprintf(\"invalid amount: %.2f\", amount))\n return\n }\n\n op.totalRevenue += amount\n op.orderCount++\n}\n\nfunc main() {\n op := &OrderProcessor{}\n var wg sync.WaitGroup\n\n orders := []float64{99.99, 149.50, -10.00, 299.99, 49.99, 0, 199.99}\n\n for _, amount := range orders {\n wg.Add(1)\n go op.ProcessOrder(amount, &wg)\n }\n\n wg.Wait()\n fmt.Printf(\"Total: $%.2f from %d orders\\n\", op.totalRevenue, op.orderCount)\n}\n```", "category": "code", "timestamp": "2026-03-15T03:38:10.857Z", "display_date": "Mar 15, 2026", "winner": { "name": "Qwen 3 8B", "provider": "openrouter", "score": 9.65 }, "avg_score": 9.352, "matrix_size": 82, "models_used": [ { "id": "kimi_k25", "name": "Kimi K2.5", "provider": "openrouter" }, { "id": "devstral", "name": "Devstral Small", "provider": "openrouter" }, { "id": "gemma3_27b", "name": "Gemma 3 27B", "provider": "openrouter" }, { "id": "llama4_scout", "name": "Llama 4 Scout", "provider": "openrouter" }, { "id": "phi4", "name": "Phi-4 14B", "provider": "openrouter" }, { "id": "granite_40", "name": "Granite 4.0 Micro", "provider": "openrouter" }, { "id": "qwen3_8b", "name": "Qwen 3 8B", "provider": "openrouter" }, { "id": "mistral_nemo", "name": "Mistral Nemo 12B", "provider": "openrouter" }, { "id": "llama31_8b", "name": "Llama 3.1 8B", "provider": "openrouter" }, { "id": "qwen3_32b", "name": "Qwen 3 32B", "provider": "openrouter" } ], "rankings": { "qwen3_8b": { "display_name": "Qwen 3 8B", "provider": "openrouter", "average_score": 9.65, "score_count": 8, "min_score": 9.2, "max_score": 10, "rank": 1 }, "llama4_scout": { "display_name": "Llama 4 Scout", "provider": "openrouter", "average_score": 9.63, "score_count": 8, "min_score": 8.8, "max_score": 10, "rank": 2 }, "gemma3_27b": { "display_name": "Gemma 3 27B", "provider": "openrouter", "average_score": 9.63, "score_count": 8, "min_score": 9.2, "max_score": 10, "rank": 3 }, "phi4": { "display_name": "Phi-4 14B", "provider": "openrouter", "average_score": 9.56, "score_count": 8, "min_score": 8.8, "max_score": 10, "rank": 4 }, "granite_40": { "display_name": "Granite 4.0 Micro", "provider": "openrouter", "average_score": 9.43, "score_count": 8, "min_score": 8.65, "max_score": 10, "rank": 5 }, "kimi_k25": { "display_name": "Kimi K2.5", "provider": "openrouter", "average_score": 9.38, "score_count": 9, "min_score": 8.6, "max_score": 10, "rank": 6 }, "mistral_nemo": { "display_name": "Mistral Nemo 12B", "provider": "openrouter", "average_score": 9.36, "score_count": 9, "min_score": 8.8, "max_score": 9.8, "rank": 7 }, "devstral": { "display_name": "Devstral Small", "provider": "openrouter", "average_score": 9.21, "score_count": 8, "min_score": 8.2, "max_score": 9.6, "rank": 8 }, "qwen3_32b": { "display_name": "Qwen 3 32B", "provider": "openrouter", "average_score": 9.06, "score_count": 8, "min_score": 8, "max_score": 9.6, "rank": 9 }, "llama31_8b": { "display_name": "Llama 3.1 8B", "provider": "openrouter", "average_score": 8.63, "score_count": 8, "min_score": 5.6, "max_score": 10, "rank": 10 } }, "judgments": [ { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 9.8, "brief_justification": "Accurately identifies data races in shared fields and provides a mutex-based solution with proper defer usage. Explains non-atomic operations and slice append issues clearly, while offering alternative approaches like atomic operations and channels for deeper understanding." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 9.4, "brief_justification": "The response correctly identifies race conditions in shared fields and implements a mutex-based solution to synchronize access. All concurrency issues (totalRevenue, orderCount, and errors) are addressed with clear code modifications and explanations." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 10, "brief_justification": "The response correctly identifies and fixes all concurrency issues using a mutex, thoroughly explains the race condition, and provides a clear, complete solution with proper synchronization for all shared resources." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 9.8, "brief_justification": "The response accurately identifies all concurrency issues (data races on shared fields and non-atomic operations) and provides a complete solution using RWMutex. The explanation is clear, the code is well-structured, and the solution is practical and testable." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 10, "brief_justification": "The response correctly identifies all concurrency issues in the Go code and provides a complete, well-explained solution using a mutex to protect shared state. The explanation is clear, the code changes are accurate, and the solution addresses all race conditions in the original implementation." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 10, "brief_justification": "The response accurately identifies the concurrency issues (race conditions on shared fields) and provides a complete, correct fix using a mutex. The explanation clearly explains the changes and their purpose, demonstrating deep understanding of Go's concurrency model. The solution is directly applicable and ensures thread-safe operations." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 10, "brief_justification": "The solution correctly identifies data races in shared state operations and implements a mutex-based synchronization strategy. It addresses all three problematic fields (totalRevenue, orderCount, errors) with proper locking, ensuring thread-safe updates and accurate results." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.8, "brief_justification": "The response correctly identifies race conditions in shared fields and implements a mutex-based solution that fully addresses all concurrency issues. The explanation is clear, the code is well-structured, and the fix is practical. Depth is slightly reduced as it doesn't explore alternative concurrency patterns like channels, but the solution is technically sound." }, { "judge_key": "qwen3_32b", "judge_name": "Qwen 3 32B", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 5.6, "brief_justification": "The response correctly identifies the concurrency issue but provides an invalid solution for atomic.Float64 (which doesn't exist in Go's standard library). It also fails to address the race condition in the errors slice. The WaitGroup implementation is unnecessarily duplicated in the main function." }, { "judge_key": "kimi_k25", "judge_name": "Kimi K2.5", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9, "brief_justification": "The response correctly identifies and fixes all race conditions (totalRevenue, orderCount, and errors slice) using sync.Mutex. However, the explanation only explicitly mentions the numeric fields and not the slice append operation, and misses opportunity to discuss alternative approaches like atomic operations or channels." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 9.2, "brief_justification": "The response correctly identifies the concurrency issues and provides a clear, actionable solution with a well-explained fix. It could benefit from a bit more detail on potential edge cases or alternative approaches." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 10, "brief_justification": "The response accurately identifies the concurrency issues, provides a clear and correct solution, and offers alternative approaches." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 10, "brief_justification": "The response correctly identifies and fixes the concurrency issues using a mutex, providing a thorough and clear explanation." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 10, "brief_justification": "The response accurately identifies the concurrency issues, provides a comprehensive fix with clear explanations, and demonstrates practical usage." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 10, "brief_justification": "The response accurately identifies the concurrency issue, provides a clear and complete solution using mutexes, and explains the changes in detail." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 9.8, "brief_justification": "The response accurately identifies the concurrency issue and provides a correct fix using a mutex. It also includes a clear explanation of the changes made." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 9.8, "brief_justification": "The response accurately identifies the concurrency issues, provides a clear explanation, and offers a correct solution with a well-structured code example." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and fixes the concurrency issue using a mutex, providing a complete and clear solution with practical value." }, { "judge_key": "devstral", "judge_name": "Devstral Small", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies the concurrency issue and provides two effective solutions with clear explanations. The use of mutex and atomic operations is well-justified, and the code examples are comprehensive and actionable." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies the concurrency issues and provides a complete and clear solution using a mutex. The explanation is well-structured and easy to follow, and the corrected code is accurate." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 9.6, "brief_justification": "The response accurately identifies the data race conditions and provides a correct and effective solution using a mutex. It also offers reasonable alternative approaches, demonstrating a good understanding of concurrency in Go." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 9.6, "brief_justification": "The response correctly identifies the race condition and provides a complete and clear solution using a mutex. The explanation is well-structured and easy to understand, and the addition of error printing enhances the practical value." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 9.8, "brief_justification": "The response correctly identifies the data race conditions and provides a robust solution using a `sync.RWMutex`. The explanation is clear and well-structured, and the inclusion of a test case enhances its practical value." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies the race condition and provides a complete and clear solution using a mutex. The explanation is well-structured and the code is accurate. The inclusion of error handling within the mutex lock is a good addition, demonstrating a thorough understanding." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 9.6, "brief_justification": "The response correctly identifies the race condition and provides a complete and clear solution using a mutex. The explanation is well-structured and easy to understand. While thorough, the depth could be slightly increased by discussing alternative synchronization primitives." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 9.6, "brief_justification": "The response accurately identifies the data race conditions and provides a correct and well-explained solution using a mutex. The explanation is clear and the corrected code is functional. The depth could be slightly improved by discussing alternative synchronization primitives." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.4, "brief_justification": "The response correctly identifies the race condition and provides a working solution using a mutex. The explanation is clear and the code is well-formatted, though a deeper dive into why race conditions occur would improve the depth." }, { "judge_key": "gemma3_27b", "judge_name": "Gemma 3 27B", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 9.6, "brief_justification": "The response accurately identifies the concurrency issue and provides two correct solutions: one using a mutex and another using atomic operations. It also correctly explains the potential performance benefits of atomic operations. The code examples are well-formatted and functional." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 9.4, "brief_justification": "The response accurately identifies and fixes concurrency issues in the provided Go code. It offers a clear explanation and provides corrected code." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 9.6, "brief_justification": "The response accurately identifies and fixes concurrency issues in the provided Go code. It provides a clear explanation of the problems, a correct solution using a mutex, and mentions alternative approaches." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 9.4, "brief_justification": "The response accurately identifies and fixes concurrency issues in the provided Go code, ensuring correct totals and counts. The solution is clear, complete, and useful for addressing similar concurrency problems." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and fixes the concurrency issue using a mutex, ensuring atomic updates to shared resources. The explanation is clear and provides a thorough understanding of the fix." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 9.6, "brief_justification": "The response accurately identifies and fixes concurrency issues in the provided Go code. It uses a mutex to protect shared state, ensuring thread safety and correct results." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 9.4, "brief_justification": "The response accurately identifies and fixes the concurrency issue in the provided Go code. It provides a clear explanation of the changes made and ensures that the corrected code is properly synchronized." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 9.6, "brief_justification": "The response accurately identifies and fixes concurrency issues in the provided Go code by introducing a mutex to protect shared state, ensuring thread safety and correctness." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.4, "brief_justification": "The response correctly identifies and fixes the concurrency issue using a mutex, ensuring accurate updates to shared fields. However, it could provide more depth by discussing potential alternatives, such as using atomic operations or channels." }, { "judge_key": "llama4_scout", "judge_name": "Llama 4 Scout", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and fixes the concurrency issue in the provided Go code. It provides two solutions, one using a mutex and another using atomic operations, both of which are clear and useful." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and resolves concurrency issues by introducing a mutex to synchronize access to shared state fields. It provides a clear, step-by-step explanation of the changes needed, ensuring the code is both correct and complete. The response is highly useful, offering practical solutions and maintaining clarity throughout the explanation." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 9.2, "brief_justification": "The response correctly identifies the concurrency issues in the Go code and provides a comprehensive solution using a mutex to protect shared state. The response also suggests alternative approaches, such as using atomic operations or channels, which adds depth and practical value. The clarity of the explanation and code is high, making it easy to understand and implement." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and resolves the concurrency issues in the Go code by using a mutex to synchronize access to shared data. The explanation is clear and complete, providing a practical solution with detailed code modifications." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and fixes the concurrency issue by introducing a mutex to protect shared resources, ensuring accurate and race-free updates to the total revenue and order count. The explanation is clear, thorough, and provides practical value by demonstrating how to implement synchronization in Go." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 10, "brief_justification": "The response correctly identifies and resolves the concurrency issues by introducing a mutex to synchronize access to shared fields, ensuring thread safety. The solution is complete, clear, and provides depth by explaining the changes and their impact on concurrency. The example use is practical and demonstrates the implementation of the solution." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and resolves the concurrency issue by introducing a mutex to synchronize access to shared variables. The explanation is clear and thorough, providing practical and actionable code changes." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 10, "brief_justification": "The solution correctly identifies and addresses the concurrency issues by adding a mutex to synchronize access to shared data within the OrderProcessor struct, ensuring thread safety and preventing data races. The explanation is thorough, covering all aspects of the problem and solution, making it complete and clear. The depth of analysis is insightful, as it explains the root cause of the problem and provides a detailed solution. The solution is practical and actionable, effectively resolving t" }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.6, "brief_justification": "The response correctly identifies and fixes the concurrency issue by using a mutex to synchronize access to shared resources, ensuring the program's accuracy and preventing race conditions. The explanation is clear and provides a practical solution with an example of the modified code. The response could delve deeper into potential performance implications or alternative concurrency patterns." }, { "judge_key": "phi4", "judge_name": "Phi-4 14B", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 10, "brief_justification": "The response correctly identifies the concurrency issues in the original Go code and provides a solution using atomic operations for thread-safe updates. The explanation is clear, concise, and complete, offering practical advice for improving performance and correctness." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 8.8, "brief_justification": "The response accurately identifies the race conditions in the shared state and provides a clear, well-structured solution using a mutex to synchronize access, with minor depth due to the straightforward nature of the concurrency issue." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 8.8, "brief_justification": "The response accurately identifies data race issues, provides a clear mutex solution, and suggests alternative concurrency patterns while maintaining good structure and detail." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 8.8, "brief_justification": "The response accurately identifies the race condition issue and provides a clear, effective solution using a mutex to synchronize access to shared data, with minor depth due to the straightforward nature of the concurrency problem." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 9.2, "brief_justification": "The solution correctly identifies and resolves the race condition by introducing a mutex to synchronize access to shared state, ensuring accurate totals and error reporting while maintaining good clarity and practical value." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 8.8, "brief_justification": "The response accurately identifies the data race and non-thread-safe append issues, provides a comprehensive fix using sync.RWMutex, and includes clear explanations and usage examples while maintaining good clarity and completeness." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 8.8, "brief_justification": "The response accurately identifies the concurrency issue due to unsynchronized access to shared state and provides a clear, effective solution using a mutex. It covers correctness, completeness, clarity, and usefulness well, with minor depth considerations due to the straightforward nature of the problem." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 9.2, "brief_justification": "The response accurately identifies the data race issue, provides a complete solution using a mutex, explains the fix clearly, and demonstrates practical usefulness by ensuring correct concurrency handling in Go." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 8.8, "brief_justification": "The response accurately identifies the race condition issue and provides a clear, well-structured solution using a mutex to ensure atomic updates to shared variables, with minor depth due to the straightforward nature of the concurrency fix." }, { "judge_key": "granite_40", "judge_name": "Granite 4.0 Micro", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 8.8, "brief_justification": "The response accurately identifies the concurrency issue, provides a corrected version using mutexes, and further improves it with atomic operations for better performance. It is clear, complete, and offers practical solutions." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 8, "brief_justification": "The response correctly identifies concurrency issues and proposes a mutex solution, but the code example is cut off mid-sentence, reducing completeness and practical usability." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 9.8, "brief_justification": "The response correctly identifies data races, provides a mutex-based solution, and offers alternative approaches. It thoroughly addresses all concurrency issues but could expand slightly on the trade-offs between atomic operations and mutexes." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 9.4, "brief_justification": "The response correctly identifies race conditions and fixes them with a mutex. It thoroughly explains the changes and provides a complete solution, though could mention that slices require additional care with concurrent appends." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 9.8, "brief_justification": "The response correctly identifies and fixes race conditions using a mutex, thoroughly explains the solution, and provides a clear, practical fix. The depth could be slightly higher by discussing alternative approaches, but the solution is effective and complete." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 9.8, "brief_justification": "The response correctly identifies and fixes all concurrency issues with proper mutex usage, provides clear explanations, and includes a complete working solution. The depth could be slightly higher with additional optimization insights, but the solution is comprehensive and actionable." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 10, "brief_justification": "The response correctly identifies race conditions in shared state access and provides a complete, clear solution with proper mutex usage. All concurrency issues are addressed with accurate implementation and explanation." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 8.8, "brief_justification": "The response correctly identifies and fixes the main race condition on totalRevenue/orderCount using a mutex. It misses addressing potential race conditions on the errors slice, but the solution is clear and directly addresses the primary issue of incorrect totals." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.4, "brief_justification": "The response correctly identifies race conditions in shared variables and fixes them with a mutex. The solution is complete, clear, and actionable, though it doesn't explore alternative synchronization mechanisms." }, { "judge_key": "qwen3_8b", "judge_name": "Qwen 3 8B", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 7.4, "brief_justification": "The response correctly identifies shared variable concurrency issues but introduces errors in the WaitGroup handling in both solutions, affecting correctness. The explanation is clear and provides insightful comparisons between mutex and atomic operations." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 8.65, "brief_justification": "The response accurately identifies and addresses the concurrency issues, providing a clear and concise explanation. It could have mentioned the potential use of atomic operations for better performance, but overall, it's very useful and well-explained." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 8.6, "brief_justification": "The response accurately identifies data races and provides a clear solution using a mutex. It also mentions alternative approaches, demonstrating good depth and usefulness." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 8.2, "brief_justification": "The response accurately identifies the concurrency issue and provides a clear, concise solution. It covers the necessary aspects of synchronization and error handling. However, it could delve deeper into the potential consequences of race conditions and the importance of proper synchronization." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 9.4, "brief_justification": "The response correctly identified and fixed the concurrency issue (race condition) using a mutex, ensuring accurate totals and error handling. It also provided a clear explanation of the fix. The only minor deduction in clarity is due to the use of technical jargon (atomic, consistent) without further explanation." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 9.25, "brief_justification": "The response accurately diagnoses and fixes concurrency issues, providing a clear and detailed explanation. It could have provided more examples or use cases for better depth." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 9.25, "brief_justification": "The response accurately identifies and fixes the concurrency issues in the Go code. It provides a clear explanation of the problem and the solution, using synchronization mechanisms to ensure thread safety. The response is comprehensive and useful, with only minor deductions for clarity due to some repetition in the explanation." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 8.65, "brief_justification": "The response correctly identified the concurrency issue and provided a clear, concise solution using a mutex. It also explained the changes made and their purpose. However, it could have delved deeper into potential race conditions and the importance of unlocking the mutex in a defer statement." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 9.4, "brief_justification": "The response accurately diagnoses the concurrency issues, explains the root cause, and provides a clear, correct, and complete solution with an improved code snippet. The explanation is well-structured but could be slightly more concise for full clarity." }, { "judge_key": "mistral_nemo", "judge_name": "Mistral Nemo 12B", "respondent_key": "llama31_8b", "respondent_name": "Llama 3.1 8B", "weighted_score": 8.4, "brief_justification": "The response accurately identifies and fixes concurrency issues, provides a clear explanation, and offers an improved solution using atomic operations. It could have provided more insights into the trade-offs between synchronization methods." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "qwen3_32b", "respondent_name": "Qwen 3 32B", "weighted_score": 9.25, "brief_justification": "The response accurately identifies and fixes the concurrency issues in the provided Go code, with clear explanations and step-by-step instructions. The only minor drawback is the lack of explicit discussion on the potential issues with using a mutex for shared state modifications, but the solution is still effective." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "kimi_k25", "respondent_name": "Kimi K2.5", "weighted_score": 9.05, "brief_justification": "The response accurately identifies concurrency issues, provides a clear solution, and offers alternative approaches with explanations, but could be more concise in its explanation of the problem." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "devstral", "respondent_name": "Devstral Small", "weighted_score": 9.25, "brief_justification": "The response accurately identifies the concurrency issue, provides a clear explanation, and offers a well-implemented solution using a mutex. The explanation of changes is detailed and easy to follow." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "gemma3_27b", "respondent_name": "Gemma 3 27B", "weighted_score": 9.4, "brief_justification": "The fix accurately identifies and addresses the concurrency issue, providing a clear and effective solution that ensures thread safety and accurate results." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "llama4_scout", "respondent_name": "Llama 4 Scout", "weighted_score": 9.6, "brief_justification": "The response accurately identifies the concurrency issues, provides a clear and step-by-step explanation, and offers a well-structured and thread-safe solution. The code is well-documented, and the explanation of changes is clear and concise." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "phi4", "respondent_name": "Phi-4 14B", "weighted_score": 9.25, "brief_justification": "The response accurately identifies the concurrency issue, explains the solution, and provides the corrected code. However, it could benefit from a more detailed explanation of the risks of race conditions and the benefits of using a mutex." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "granite_40", "respondent_name": "Granite 4.0 Micro", "weighted_score": 9.6, "brief_justification": "The response accurately identifies the concurrency issue, provides a clear explanation, and implements a correct solution using a mutex for synchronization." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "qwen3_8b", "respondent_name": "Qwen 3 8B", "weighted_score": 9.6, "brief_justification": "The response accurately diagnoses the concurrency issues, provides a clear explanation, and offers a correct and effective solution, with a clear explanation of the fix and its impact." }, { "judge_key": "llama31_8b", "judge_name": "Llama 3.1 8B", "respondent_key": "mistral_nemo", "respondent_name": "Mistral Nemo 12B", "weighted_score": 9.25, "brief_justification": "The response accurately identifies and fixes the concurrency issue in the provided Go code, ensuring thread safety and correct results." } ], "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)" } }