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Claude Sonnet 5.5Closed
Tool use · Reasoning
Evaluation overview
Overall rank
#2
95.2 points · 209 models
Research rank
#2
97.4 points · 203 models
Data coverage
18 items
1 source · updated through 2026-09-28
Domain performance
Coding#8 / 189
95.3
Research#2 / 203
97.4
Agents#2 / 155
98.6
Vision#3 / 87
93.1
Evaluation highlights
All evaluationsBasic information
- Context (input / output)
- 1M / 128K
- Release date
- 2026-09
- Input modalities
- Text · Image
- Output modalities
- Text
- Exact release date
- 2026-09-28
- Reasoning mode
- Adaptive
- API model ID
- claude-sonnet-5-5
- Reliable knowledge cutoff
- 2026-06
- Training data cutoff
- 2026-06
- Default reasoning effort
- high
Availability
AnthropicFull pricing
- Input
- $2 /1M
- Output
- $10 /1M
Related links
Version relationships
Claude Sonnet 5 family
Claude Sonnet 5
2026-06 · Same series
Claude Sonnet 5.5Current
2026-09 · Current model