Anthropic releases Sonnet 5.5, saying it generates outputs 30%+ faster than Sonnet 5 and costs up to 30% less per task, and plans to release Haiku 5.5 soon (Anthropic)

Anthropic has released Sonnet 5.5, a model that runs more than 30% faster and costs up to 30% less per task than its predecessor. The new version includes cyber safeguards and classifiers that block reasoning extraction. It scores 70.6% on Terminal-Bench 4.0, improving on Sonnet 5.

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