Toolathlon Verified Pass@3 (Anthropic Internal Harness): leaderboard
Metric: Pass@3 (%). Source: www-cdn.anthropic.com. 5 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Opus 4.8 (Max) | 88 |
| 2 | Claude Opus 5 (Max) | 87 |
| 3 | Claude Sonnet 5 (Max) | 84.3 |
Interactive version: theaggregate.ai/benchmark?slug=toolathlon-verified-pass-3-anthropic-internal-harness · How It Works · Data refreshed daily, snapshot 2026-09-19.