Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
Anthropic: Claude Opus 4.5 — Anthropic. Context window 200,000 tokens. API pricing (per 1M tokens): Input $5, Output $25. License: Proprietary. LMArena 1,451. GPQA Diamond 80.7%.
| Provider | Anthropic |
|---|---|
| API model ID | anthropic/claude-opus-4.5 |
| Tier | Frontier |
| Context window | 200,000 tokens |
| Max output | 64,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $5 |
| API pricing (per 1M tokens) · Output | $25 |
| LMArena | 1,451 (claude-opus-4-5-20251101) |
| GPQA Diamond | 80.7% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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