SWEBench

OpenAI has stopped publishing evaluation reports for the SWE-bench Verified benchmark and recommended moving to SWE-bench Pro. An audit found test-design flaws in 59.4% of the failed tasks: 35.5% used overly narrow tests that only allowed a specific implementation approach, and 18.8% included tests that required behavior not stated in the problem description. The audit also identified training-data contamination, with frontier models reproducing the gold patches verbatim from public repositories.