Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...
Anthropic: Claude Opus 5 — Anthropic. Context window 1,000,000 tokens. API pricing (per 1M tokens): Input $5, Output $25. License: Proprietary. LMArena 1,507. GPQA Diamond 93.9%.
| Provider | Anthropic |
|---|---|
| API model ID | anthropic/claude-opus-5 |
| Tier | Frontier |
| Context window | 1,000,000 tokens |
| Max output | 128,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $5 |
| API pricing (per 1M tokens) · Output | $25 |
| LMArena | 1,507 (claude-opus-5-max) |
| GPQA Diamond | 93.9% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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