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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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
$ per 1M tokens
No data recorded for this period
0 observations (OpenRouter listing). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Model launch7mo agoAnthropic releases Claude Sonnet 4.6 (16k thinking)Epoch AI Benchmarking Hub