Anthropic releases Opus 5.5 with lower prices and Fable-level performance

Anthropic has released its newest model, Opus 5.5, which the company claims sets a new state-of-the-art in coding and knowledge work performance. Opus is the most capable tier in Anthropic’s Claude lineup, and this release reportedly outperforms the larger Fable model in many benchmarks and informal tasks. This launch follows the release of Opus 5 just two months prior, with Sonnet 5.5 and Haiku 5.5 expected to follow in the coming weeks with similar performance improvements.