Anthropic’s original take home assignment open sourced
Anthropic’s Original Performance Take-Home This repo contains a version of Anthropic’s original performance take-home, before Claude Opus 4.5 started doing better than humans given only 2 hours. Now you can try to beat Claude Opus 4.5 given unlimited time! Performance benchmarks measured in clock cycles from the simulated machine: 2164 cycles: Claude Opus 4 after many hours in the test-time compute harness 1790 cycles: Claude Opus 4.5 in a casual Claude Code session, approximately matching the best human performance in 2 hours 1579 cycles: Claude Opus 4.5 after 2 hours in our test-time compute harness 1548 cycles: Claude Sonnet 4.5 after many more than 2 hours of test-time compute 1487 cycles: Claude Opus 4.5 after 11.5 hours in the harness 1363 cycles: Claude Opus 4.5 in an improved…
