Claude Haiku 4.5
Key facts · verified Oct 29, 2026
Claude Haiku 4.5 is an Anthropic model released on 15 Oct 2025. Its API price is $1 per million input tokens and $5 per million output tokens. Its context window is 200k tokens. It ranks #145 on LMArena's text leaderboard (Elo 1415, read 1 Nov 2026). Source: platform.claude.com.
Claude Haiku 4.5 is an Anthropic model released on October 15, 2025, which Anthropic described as offering coding performance comparable to Claude Sonnet 4 at roughly a third of the cost and more than twice the speed. Anthropic lists it as a legacy model since Claude Haiku 5.5 was released on October 7, 2026, and states it will be retired no sooner than October 15, 2026. It has a 200K-token context window and is priced at $1 per million input tokens and $5 per million output tokens.
Key Features
Full Specifications
$1 / $5 per million tokens | |
|---|---|
| Identity | |
| Developer | Anthropic |
| Released | Oct 2025 |
| Status | Available (legacy) |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $2.000 / 1M tokens |
| Input price | $1.000 / 1M tokens |
| Output price | $5.000 / 1M tokens |
| Cached input | $0.10 / 1M tokens (cache hit) |
| Batch discount | 50% off input/output (Batch API) |
| Free tier | Free access on claude.ai; small trial API credit for new accounts |
| Capacity | |
| Context window | 200k tokens |
| Max output | 64k tokens |
| Long-context surcharge | N/A (200k context, not the 1M tier) |
| Capability | |
| Vision in | Yes |
| Audio in | No |
| Function calling | Yes |
| Structured output | Yes |
| Extended reasoning | Yes |
| Web search | Yes |
| Code execution | Yes |
| Access | |
| API | Yes |
| Chat app | Yes |
| Cloud marketplaces | AWS Bedrock, Google Cloud, Microsoft Foundry |
| Fine-tuning | No |
| Measured quality | |
| LMArena Elo | 1415 (checked Nov 2026) |
| LMArena rank | Rank 145 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 708 |