Claude Opus 4.5 (64k thinking)
ModelActiveby Anthropic · family “claude-opusk-thinking”
Epoch Capabilities Index
Not scored by Epoch AI
Released
24 Nov 2025
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Input $ / 1M tokens
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Output $ / 1M tokens
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Cached input $ / 1M
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Each benchmark shown separately with its own source
Benchmark results (4)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| Furniture Assembly | multimodal | 28.3% ±5.9 | 34% | 64K | 10 Sep 2026 | Epoch ↗ |
| ARC-AGI-2 | reasoning | 37.6% | 40% | 64K | — | External ↗ |
| Balrog | games | 43.0% | 63% | 64K | — | External ↗ |
| ARC-AGI | reasoning | 80.0% | 81% | 64K | — | External ↗ |
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
This model has no public API price listing
0 recorded prices on — (OpenRouter listing); re-read on every data refresh, most recently 3h ago. Steps show when the price changed.
Events
- BenchmarkEpoch AI evaluates Claude Opus 4.5 (64k thinking)Epoch AI Benchmarking Hub
- Model launchMajorAnthropic releases Claude Opus 4.5 (64k thinking)Epoch AI Benchmarking Hub