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Anthropic · Active

Claude Sonnet 4.5

claude-sonnet family · launched 2025-09-29

MultimodalReasoningTools
AITopic score52.8#93 overall

Balanced Claude model for coding, analysis, agent workflows, and cost control

Evidence coverage5%1 evaluations · 1 institutions
Context / maximum output200k / 64ktokens
Cache / input / output$0.3 · $3 · $15USD per million tokens
Value / freshness33.6 / 42relative value · release freshness
Product profile

What this model supports

Inputtext, image, pdf
Outputtext
Knowledge cutoff2025-07-31
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 Analysis63.18 indexReading 52.8

Imported from Artificial Analysis. The published 0–100 score is used directly; it is not z-score normalized.

Configuration: Claude Sonnet 4.5Open evidence
Arena TextLMArena1,434.5 EloReading 52.8

Direct LMArena text leaderboard result.

Open evidence
Same builder

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