Anthropic
Claude Opus 5.5 (Fast)
Claude Opus 5.5 is a step-change improvement over Opus 5 for agentic coding, long-running agentic tasks, knowledge work, communication, and vision. It is more token-efficient per completed task and reports progress, findings, and next steps in clear language.
Introducing Claude OpusModel Snapshot
TypeLanguage
ReleaseSep 22, 2026
Context1,000,000
Tagsexplicit-caching, fast, file-input, reasoning
Overall
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Coding
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Blended Price
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Strength Profile
Percentile score by analysis domain.
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Benchmark Percentiles
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Model Details
Runtime
Max Output128,000
Streaming speed is not measured for this model yet.
Pricing
Blended-
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Output-
Catalog$8.00/M in / $40.00/M out
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