Claude says Claude Opus 5.5 is available today
Claude says Claude Opus 5.5 is available today. The statement was posted at 18:55 UTC on September 22, 2026, and does not name a platform, price, quota, or who can use the model.
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Claude introduces Opus 5.5, the first model in the Claude 5.5 family
Claude says Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks and costs 40% less to run than Opus 5.
Claude Opus 5.5 is now available on B.AI, with API and Web Chat opening together
B.AI now offers Claude Opus 5.5. According to B.AI, the model supports a 1M-token context and up to 128K output, matches Claude Fable 5.1 on most tasks, and costs about 40% less to run than Opus 5.
Claude Opus 5.5 is live in Command Code Max and API
Command Code now offers Claude Opus 5.5 in Command Code Max and through its API. No pricing, quota, or other access conditions were stated.