Anthropic has released Claude Sonnet 5.5, the second model in the Claude 5.5 family. Achieving a record 70.6% on Terminal-Bench 4.0, Sonnet 5.5 cuts per-task costs by up to 30% and accelerates output generation speeds by more than 30%.
Anthropic has released Claude Opus 5.5, the flagship of its new 5.5 model generation. Leading major benchmarks in agentic software engineering and computer use, Opus 5.5 slashes typical workload costs by 40%, speeds up generation by 30%, and introduces strict anti-distillation safeguards.
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