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

Anthropic’s newest model, Opus 5.5, was released on Tuesday, setting a new state-of-the-art in coding and knowledge work performance, according to the company. Opus is the most capable and expensive tier in Anthropic’s three-tier Claude lineup; Sonnet sits in the middle, while Haiku is the fastest and cheapest. Notably, Anthropic says, the release outpaces the larger Fable model in many benchmarks and succeeded in a number of informal tasks that Fable failed to complete.

The new model is also significantly…