Anthropic launched Claude Opus 5.5 at $4 per million input tokens and $20 per million output tokens.

The supplied reports state that Claude Opus 5.5 is available across platforms including AWS, Google Cloud, and Microsoft Azure. Reported pricing is $4 per million input tokens and $20 per million output tokens (每百万输入 token 收费 4 美元，每百万输出 token 收费 20 美元); these are distinct usage charges, not a blended rate or subscription price.

Anthropic reportedly says the model costs approximately 40% less to run than Opus 5, produces output faster, and generates clearer writing. Multiple messages compare its performance on most work tasks with Claude Fable 5.1, while others name Claude Opus 5.1; that inconsistency prevents treating the comparator as unambiguous, and no underlying benchmark results are supplied.

Usage-limit reporting is also inconsistent: a consolidated message gives a 25% expansion in five-hour and weekly allowances (5 小时及周额度将扩容 25%), but separately states a 20% increase in five-hour limits for subscribers across all plans (所有套餐的 Opus 5.5 五小时使用限额将上调 20%). The source does not explain how those figures relate, so they should not be combined into one confirmed entitlement change.

Anthropic also reportedly plans Sonnet 5.5 and Haiku 5.5 releases in the coming weeks; those remain announced plans rather than completed launches. Coverage places Opus 5.5 after CEO Dario Amodei’s call for slower AI development and additional safety measures, including third-party assessments; although one message references an anticipated IPO, it supplies no filing, valuation, offering terms, or confirmed listing date.