Claude Opus 5.5
Official information
- Official model ID
- claude-opus-5-5
- Vendor source
- Claude Opus 5.5
- Identity verified
- Oct 5, 2026
API pricing
- Verification
- Unverified
- Verified at
- —
- Value benchmark tier
- —
—
Rankings by category
Overall
#2High 0.9696.8
| Source | Percentile | Raw score | Config folding |
|---|---|---|---|
| Epoch AI | 99.0 | 168.8 | Single config |
| LiveBench | 92.4 | 82.6 | Median of 2 configs |
| LMArena | 99.0 | 1516.2 | Single config |
Cross-source percentile spread 6.6
Coding
#1High 0.7698.9
| Source | Percentile | Raw score | Config folding |
|---|---|---|---|
| LiveBench | 98.9 | 76.8 | Median of 2 configs |
| LMArenatext-coding | 99.0 | 1545.0 | Single config |
| · webdev | 98.9 | 1806.9 | Single config |
Cross-source percentile spread 0.1
Agent
#1High 0.8598.1
| Source | Percentile | Raw score | Config folding |
|---|---|---|---|
| Agents' Last Exam | 98.2 | 63.2 | Single config |
| LMArena | 97.9 | 0.2 | Single config |
Cross-source percentile spread 0.3
Reasoning
#7High 0.8886.4
| Source | Percentile | Raw score | Config folding |
|---|---|---|---|
| Epoch AI | 67.7 | 0.9 | Single config |
| LiveBench | 94.6 | 94.2 | Median of 2 configs |
| LMArenatext-math | 95.1 | 1517.8 | Single config |
| · text-hard | 99.0 | 1536.4 | Single config |
Cross-source percentile spread 29.4
Aliases & configurations
- claude-opus-5-5
- claude-opus-5-5
- claude-opus-5-5-high· high
- claude-opus-5-5-max· max
- claude-opus-5-5-max-effort· max effort
- claude-opus-5-5-xhigh-effort· xhigh effort