Introducing Claude Opus 5.5
Anthropic released Claude Opus 5.5, the first model in its new 5.5 family, matching Claude Fable 5.1-level performance on most work while costing 40% less to run than Opus 5. The model leads in agentic coding, computer use, and knowledge work, and was tested pre-release by external evaluators including Frontier Design and METR. It is available now via the Claude API and across AWS, Google Cloud, and Microsoft Azure at $4 per million input tokens and $20 per million output tokens.
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