Claude Opus 5.5
#1 of 274 scored.
AnthropicSep 22, 2026Closed
Capabilities Index
Range 164.1–171.7
167.3
Context
Takes text, image, file
1M
Input
Per 1M tokens
$4.00
Output
Per 1M tokens
$20
Benchmarks
How it scores.
- GPQA Diamond87.5%
35th of 186
- FrontierMath91.2%
3rd of 81
- ARC-AGI-293.3%
3rd of 79
- SimpleQA Verified72.2%
4th of 77
- Mock AIME100%
1st of 176
Everything else Epoch has for it
- ProofBench100%
- ARC-AGI98.5%
- DTBench98.2%
- FrontierMath-Tier-4-v2-Private95.0%
- LMCA80.3%
- MirrorCode77.4%
- Furniture Assembly76.2%
- APEX-Agents73.5%
- EBR-bench71.4%
- Mystery Game Puzzles68.0%
- FrontierSWE62.3%
- FrontierCode54.6%
On the index
Around it.
Sources