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Anthropic launches Claude Opus 5.5, raising speed 30 percent and cutting costs 40 percent

Anthropic on Sept. 22 unveiled its new AI model Claude Opus 5.5. The company said it delivers performance similar to the higher-tier Claude Fable 5.1 on many tasks while cutting typical workload costs by 40 percent versus Claude Opus 5 and boosting output speed by more than 30 percent. The model is available across Claude subscriptions and via the Claude API and major cloud platforms. Anthropic also detailed pricing, developer settings, benchmarks, early use cases and safety assessments.