Claude Haiku 5.5 vs Claude Haiku 4.5
Claude Haiku 5.5 is from Anthropic, released October 7, 2026. Claude Haiku 4.5 is from Anthropic, released October 15, 2025.
- LMArena Elo1425 vs 1414. Claude Haiku 5.5 is 0.8% ahead on LMArena Elo.
- Input per 1M$0.10 vs $1. Claude Haiku 5.5 costs 90% less per million input tokens.
- Output per 1M$0.50 vs $5. Claude Haiku 5.5 costs 90% less per million output tokens.
- Context window1M vs 200k. Claude Haiku 5.5 takes 400% more context in one request.
Prices are the vendors’ published API rates; Elo is LMArena’s text board. Each figure is dated on its model page.
Interactive Comparison
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$0.10 / $0.50 per million tokens | $1 / $5 per million tokens | |
|---|---|---|
| Identity | ||
| Developer | Anthropic | Anthropic |
| Released | Oct 2026 | Oct 2025 |
| Status | — | Available (legacy) |
| Licence | Proprietary | Proprietary |
| Self-hostable | No | No |
| Cost | ||
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $0.200 / 1M tokens | $2.000 / 1M tokens |
| Input price | $0.100 / 1M tokens | $1.000 / 1M tokens |
| Output price | $0.500 / 1M tokens | $5.000 / 1M tokens |
| Cached input | $0.01 per 1M tokens (over 100K: $0.05) | $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 | 1M tokens | 200k tokens |
| Max output | 128K tokens | 64k tokens |
| Long-context surcharge | Prompts over 100K tokens: $0.50 / $2.50 per 1M tokens | N/A (200k context, not the 1M tier) |
| Capability | ||
| Vision in | Yes | Yes |
| Audio in | — | No |
| Function calling | — | Yes |
| Structured output | — | Yes |
| Extended reasoning | — | Yes |
| Web search | — | Yes |
| Code execution | — | Yes |
| Access | ||
| API | Yes | Yes |
| Chat app | — | Yes |
| Cloud marketplaces | — | AWS Bedrock, Google Cloud, Microsoft Foundry |
| Fine-tuning | — | No |
| Measured quality | ||
| LMArena Elo | 1425 (checked Oct 2026) | 1414 (checked Oct 2026) |
| LMArena rank | Rank 126 | Rank 144 |
| GPQA Diamond | 90 · max effort | — |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 7125 | 707 |
