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!
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 test time compute harness
If you optimize below 1487 cycles, beating Claude Opus 4.5's best performance at launch, email us at performance-recruiting@anthropic.com with your code (and ideally a resume) so we can be appropriately impressed and perhaps discuss interviewing.
Run python tests/submission_tests.py to see which thresholds you pass.
Rn, I'm at a score of 1462 cycles. Not too bad :D