waypoints.si The sky Every system The lead Countries Forecast revisions
Claude Opus 5.5
Anthropic, 22 Sep 2026. Too new for Epoch AI’s data: listed by OpenRouter the day its API went live, with no compute estimate yet.
- Lab
- Anthropic
- Released
- 22 Sep 2026
- Kind
- Language
- Training compute
- Not estimated yet
- Parameters
- Not disclosed
- Organisations
- Anthropic
- Country
- United States
See it in the 3D sky OpenRouter listing
Data: Epoch AI (Creative Commons Attribution), releases too new for it from OpenRouter, and METR. Updated 25 Sep 2026.