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Introducing Claude Opus 5.5
Claude Opus 5.5 costs 40% less than Opus 5 and generates output 30% faster.
Anthropic released Claude Opus 5.5, a new model that performs at the level of Claude Fable 5.1 on most work while costing 40% less to run than Opus 5.
The model achieves the best scores on Anthropic's automated behavioral audit and generates output more than 30% faster than Opus 5.
Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in the coming weeks.
From the source
It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5. Opus 5.5 achieves the best scores of any model to date on our automated behavioral audit, our alignment suite that tests Claude across thousands of simulated scenarios.
anthropic.com
