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Separating signal from noise in coding evaluations

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Summary

OpenAI audited SWE-Bench Pro, the successor to SWE-bench Verified, using an automated datapoint analysis pipeline plus multi-pass agent review and human annotation by five software engineers. The audit flagged 200 (27.4%) tasks automatically and 249 (34.1%) through human annotation, with issues in four categories: overly strict tests, underspecified prompts, low-coverage tests, and misleading prompts. OpenAI estimates that about 30% of SWE-Bench Pro tasks are broken and advises model developers to examine results carefully.