AI & agents
Anthropic releases Claude Opus 5.5 with Fable-level performance at lower cost
- Published
- Source
- Anthropic newsroom
Summary
Anthropic has launched Claude Opus 5.5, the first model in the Claude 5.5 family. The company says it performs close to the larger Fable 5.1 on most work while costing about 40% less than Opus 5 on typical workloads, at $4 input and $20 output per million tokens, with cache reads 60% cheaper and output more than 30% faster. Before release, the model was reviewed by external evaluators including METR and Frontier Design, and Anthropic reports its best-ever score on its internal behavioral audit. Sonnet 5.5 and Haiku 5.5 are due in the coming weeks.
Why it matters for our work
Top-tier coding and knowledge-work performance is moving into a mid-range price band, and cheaper cache reads directly cut the cost of agents that run for hours over code and documents. Cost and benchmark figures are Anthropic's own claims.
Translated from the Korean original. Summaries may be translated and edited. Commentary reflects our perspective; forecasts remain the source’s views.