Model release: Anthropic & Claude Opus 5.5

Model release ● Confirmed 90% confidence first seen 22 September 2026, 12:30

Type: Model release
Status: Confirmed
First seen: 22 September 2026, 12:30
Latest source: 23 September 2026, 21:09
Sources: 3

Anthropic Claude Opus 5.5 Artificial Analysis Artificial Analysis Dario Amodei Fable 5.1 Intelligence Index METR

Source coverage

22 Sep, 12:30 Model release: Anthropic & Claude Opus 5.5 The Verge independent 22 Sep, 17:49 Model release: Anthropic & Claude Opus 5.5 Trending Topics independent 23 Sep, 21:09 Model release: Anthropic & Claude Opus 5.5 Zvi (Don't Worry About the Vase)