Claude Sonnet 4.6 (16k thinking)
ModelActiveby Anthropic · family “claude-sonnetk-thinking”
Epoch Capabilities Index
Not scored by Epoch AI
Released
17 Feb 2026
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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 (2)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| FrontierMath-Tier-4-2025-07-01-Privatesuperseded | math | 8.3% ±4.0 | 17% | 16K | 21 Feb 2026 | Epoch ↗ |
| FrontierMath-2025-02-28-Privatesuperseded | math | 32.4% ±2.8 | 62% | 16K | 20 Feb 2026 | Epoch ↗ |
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
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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
- Model launchMajorAnthropic releases Claude Sonnet 4.6 (16k thinking)Epoch AI Benchmarking Hub