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Claude Sonnet 5.5

anthropic/claude-sonnet-5-5

Everyday Claude agent model with improved speed and lower cost for coding, planning, browsing, and general work.

Compare
Context window
1M
Input
Document · Image · Text
Output
Text
Released
2026-09-28
Max output
128K
Model parameters
0
Active parameters
0
Weights
Closed
Capabilities
Attachments, Reasoning, Tool call

Pricing

IN

$2.00

USD / 1,000,000 token

Cache write

$2.50 – $4.00

USD / 1,000,000 token

$2.50 · cache TTL: 5m

$4.00 · cache TTL: 1h

Cache read

$0.10

USD / 1,000,000 token

OUT

$10.00

USD / 1,000,000 token

Performance

Overall capability

75.2/100

Coding
78.6
Reasoning
75.8
Professional work
68.2
Knowledge & language
66.3
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SciCodeClaude Sonnet 5.5 (Max, Default Fallback)CodingArtificial Analysis2026-11-05
Terminal-Bench 4.0 (AA rerun)Claude Sonnet 5.5 (Max, Default Fallback)CodingArtificial Analysis2026-11-05
CritPtClaude Sonnet 5.5 (Max, Default Fallback)ReasoningArtificial Analysis2026-11-05
Terminal-Bench Science(Vals 复跑)ReasoningVals AI2026-11-05
BullshitBench v2Knowledge & languageBullshitBench2026-11-05

Providers

InputOutputCache readCache write
Anthropicclaude-sonnet-5-5Anthropic messages-----

ModelRegistry · Catalog updated 2026-11-05