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Anthropic · Active

Claude Opus 5.5

claude-opus family · launched 2026-09-22

MultimodalReasoningToolsStructured
AITopic score88.4#2 overall

Claude model for long-running agentic coding and knowledge work

Evidence coverage3%1 evaluations · 1 institutions
Context / maximum output1M / 128ktokens
Cache / input / output$0.2 · $4 · $20USD per million tokens
Value / freshness55.3 / 100relative value · release freshness
Product profile

What this model supports

Inputtext, image, pdf
Outputtext
Knowledge cutoff2026-06
WeightsProprietary / hosted
Capability profile

Strengths by domain

Coding—0 public results
Research & reasoning—0 public results
Professional work—0 public results
Knowledge & instruction—0 public results
Behind the score

Every result has a source

Raw results and standardized readings are shown together. Missing tests add neither points nor penalties.

Human preference & indices2 results

AA IndexArtificial Analysis88.27 indexReading 88.4

Imported from a directly fetched third-party leaderboard.

Configuration: Claude Opus 5.5Open evidence
Arena TextLMArena1,515.8 EloReading 88.4

Direct LMArena text leaderboard result.

Open evidence
Same builder

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