| Paper | Code | Average Test Pass Rate | ModelName | ReleaseDate |
|---|---|---|---|---|
| Introducing Claude Opus 5.5 | ✓ Link | 91.2 | Claude Opus 5.5 (max effort) (mini-swe-agent) | 2026-09-22 |
| Introducing Claude Fable 5.1 and Claude Mythos 5.1 | 87.6 | Claude Fable 5.1 (max effort) (mini-swe-agent) | 2026-09-01 | |
| Introducing Claude Haiku 5.5 | 82.0 | Claude Haiku 5.5 (max effort) (mini-swe-agent) | 2026-10-07 | |
| Introducing Claude Sonnet 5.5 | ✓ Link | 79.7 | Claude Sonnet 5.5 (max effort) (mini-swe-agent) | 2026-09-28 |