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Claude Opus 5.5Closed
Tool use · Reasoning
Evaluation overview
Overall rank
#1
100 points · 208 models
Research rank
#1
100 points · 202 models
Data coverage
18 items
1 source · updated through 2026-09-22
Domain performance
Coding#4 / 188
98.9
Research#1 / 202
100
Agents#1 / 154
100
Vision#2 / 86
99.8
Evaluation highlights
All evaluationsBasic information
- Context (input / output)
- 1M / 128K
- Release date
- 2026-09
- Input modalities
- Text · Image
- Output modalities
- Text
- Exact release date
- 2026-09-22
- Reasoning mode
- Adaptive (always on)
- API model ID
- claude-opus-5-5
- Reliable knowledge cutoff
- 2026-06
- Training data cutoff
- 2026-06
- Default reasoning effort
- medium
Availability
AnthropicFull pricing
- Input
- $4 /1M
- Output
- $20 /1M
Related links
Version relationships
Claude Opus 5 family
Claude Opus 5
2026-07 · Same series
Claude Opus 5.5Current
2026-09 · Current model