Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...
Anthropic: Claude Haiku 4.5 — Anthropic. Context window 200,000 tokens. API pricing (per 1M tokens): Input $1, Output $5. License: Proprietary. LMArena 1,396. GPQA Diamond 60.5%.
| Provider | Anthropic |
|---|---|
| API model ID | anthropic/claude-haiku-4.5 |
| Tier | Frontier |
| Context window | 200,000 tokens |
| Max output | 64,000 tokens |
| License | Proprietary |
| API pricing (per 1M tokens) · Input | $1 |
| API pricing (per 1M tokens) · Output | $5 |
| LMArena | 1,396 (claude-haiku-4-5-20251001) |
| GPQA Diamond | 60.5% |
LMArena (CC-BY 4.0, best reasoning setting, 2026-10-02) · GPQA Diamond: Epoch AI (CC-BY 4.0)
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