Researchers found that SWE-Bench Pro, a widely used coding benchmark, has significant issues, with around 30% of its tasks being broken. The problems include overly strict tests, underspecified prompts, low-coverage tests, and misleading prompts. This discovery highlights the importance of rigorously checking benchmarks to ensure they accurately measure model capabilities. The researchers advise model developers to carefully examine results and retract their earlier recommendation to adopt SWE-Bench Pro.