Anthropic · Claude
Claude Opus 4.6
SupersededBrought the 1M context window to general availability (no surcharge). 78.3% MRCR v2 at 1M, 14.5-hour task window, native Agent Teams. Superseded by Opus 4.8. $5/$25.
About this version
Claude Opus 4.6 is the flagship version of Anthropic’s Claude series released on 5 February 2026 and now superseded by Opus 4.8. It made the one‑million‑token context window generally available without an additional surcharge, introduced a longer 14.5‑hour task window and native Agent Teams functionality, and achieved a reported 78.3 % MRCR v2 at the full context length.
- API string
- claude-opus-4-6
- Context window
- 1M ctx
- Tier
- Flagship
- Released
- Feb 5, 2026
Release & change timeline
1 event- Release
Claude Opus 4.6 released
Brought the 1M-token context window to general availability with no surcharge.
Report an issue with Claude
Posts to your status feed
Pick the closest match below, edit the body, and post. Your report carries the #claude tag automatically so it surfaces here + in the trending-tags rail. Reporting also follows Claude so you’ll get status updates.
Part of the Claude version timeline. Catch Me Up — everything that changed across AI & smart home ↗