Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 lineup, according to The Decoder. The company said the model delivers output more than 30% faster and cuts per-task costs by as much as 30%. On knowledge-work benchmarks, its performance is close to Claude Opus 5.5. Anthropic also highlighted a sharp gain on the coding benchmark Terminal-Bench, where Sonnet 5.5 improved from 10.3% to 70.6%. The release expands Anthropic’s latest model family ahead of the expected launch of Haiku 5.5 in the coming weeks. Once that model arrives, Anthropic will soon have a three-model lineup that corresponds one-to-one with OpenAI’s three GPT-6 models, as described in the report.
Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 series, according to The Decoder.
The company said the model produces output more than 30% faster, while reducing cost per task by as much as 30%. On knowledge-work benchmarks, its performance is close to Opus 5.5.
On the coding benchmark Terminal-Bench, Claude Sonnet 5.5 improved from 10.3% to 70.6%.
With Haiku 5.5 set to arrive in the coming weeks, Anthropic will soon have products that map one-to-one to OpenAI’s three GPT-6 models.
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