Anthropic released Claude Opus 5.5 as the first model in the Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work. It costs 40% less to run than Opus 5 on typical workloads. Input and output tokens are priced at $4 and $20 per million. Cache reads cost $0.20 per million tokens. It generates output over 30% faster than Opus 5. Five-hour usage limits increased on Pro, Max, Team, and Enterprise plans. Subscription users received a rate limit reset they can save and use later. Opus 5.5 leads in agentic coding, computer use, and knowledge work benchmarks. It achieved the best scores to date on Anthropic’s automated behavioral audit. It is less likely to take hard-to-reverse actions or act outside given boundaries. It is more resistant to prompt injection than Opus 5. Vetted organizations can apply to use it for biology research today.

• 40% cheaper than Opus 5 on typical workloads
• $4 per 1M input tokens
• $20 per 1M output tokens
• $0.20 per 1M cache reads