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Anthropic released Claude Opus 5.5 on September 22, 2026. Anthropic says it performs at the level of Fable 5.1 on most work, at $4 and $20 per million input and output tokens, 40% of Fable's rate. Pro, Max, Team and seat-based Enterprise plans get higher five-hour limits.
Anthropic released Claude Fable 5.1 and Mythos 5.1 on September 1, 2026. The price stays at $10 and $50 per million tokens, cache reads drop 75%, and the model is now allowed to hunt software vulnerabilities, the same kind of task Anthropic says sat behind the jailbreak claim that got Fable 5 switched off in June.
Anthropic released Claude Opus 4.7 today with a 13% coding benchmark gain, a new xhigh effort tier, a /ultrareview mode, and high-resolution vision. Pricing is unchanged at $5 and $25 per million tokens, but a new tokenizer can raise effective costs by up to 35%. Here is what changed.