Anthropic said Claude Opus 5.5 is now available on all platforms, including Amazon Web Services, Google Cloud, and Microsoft Azure. According to Odaily, the model matches Claude Fable 5.1 on most tasks and costs 40% less to run than Opus 5. Anthropic priced Claude Opus 5.5 at $4 per million input tokens and $20 per million output tokens. The company also said Claude Sonnet 5.5 and Claude Haiku 5.5 will be released in the coming weeks.