Josh Kerr broke the 27-year-old world record for the mile at the Diamond League meeting in London, completing the race in front of a sell-out crowd of approximately 60,000. His performance shaved half a second off the previous record, bringing the mile record back to British hands.

The Claude Code Opus 4.5 Performance Tracker provides daily benchmarks on a curated subset of SWE-Bench-Pro to monitor performance changes. It utilizes statistical testing to detect significant degradations in performance, benchmarking directly in the Claude Code CLI with the Opus 4.5 model.