Claude Sonnet 4.5

anthropic/claude-sonnet-4-5-20250929

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

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Context window: 200K
Input: Document · Image · Text
Output: Text
Released: 2025-09-29

Max output: 64K
Knowledge cutoff: 2025-07-31
Weights: Closed
Capabilities: Attachments, Reasoning, Temperature, Tool call

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Performance

Overall capability

45.3/100

Coding: 43.2
Reasoning: 36.4
Professional work: 44.2
Knowledge & language: 52.5


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ModelRegistry · Catalog updated 2026-11-05