Anthropic · Reasoning

Claude Opus 4.8

New Anthropic frontier model with 1M-token default context on API/Bedrock/Vertex, 128k max output and adaptive thinking. Scores 88.6% SWE-bench Verified, 69.2% SWE-bench Pro, 74.6% Terminal-Bench 2.1 and 84% Online-Mind2Web (best computer-use model tested); Fast mode is ~2.5× faster and 3× cheaper than Opus 4.7.

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