Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Anthropic: Claude Opus 4.1 — Anthropic. Context window 200,000 tokens. API pricing (per 1M tokens): Input $15, Output $75. License: Proprietary. LMArena 1,419. GPQA Diamond 73.2%.
| Provider | Anthropic |
|---|---|
| API model ID | anthropic/claude-opus-4.1 |
| Tier | Frontier |
| Context window | 200,000 tokens |
| Max output | 32,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $15 |
| API pricing (per 1M tokens) · Output | $75 |
| LMArena | 1,419 (claude-opus-4-1-20250805) |
| GPQA Diamond | 73.2% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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