Claude 4.5 Haiku vs Claude 4.6 Sonnet
Direct spec comparison of Claude 4.5 Haiku (from Anthropic) and Claude 4.6 Sonnet (from Anthropic). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.5 HaikuAnthropic | Claude 4.6 Sonnet Anthropic | |
|---|---|---|
| Vendor | Anthropic | Anthropic |
| Family | Claude | Claude |
| Release date | 2025-10-01 | 2026-02-17 |
| Context window | 200,000 tokens | 1,000,000 tokens |
| Parameters | — | — |
| Modality | text, vision | text, vision |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Fast, cost-effective Claude model. | Anthropic's mid-tier flagship — released 12 days after Opus 4.6 and matching most of its capabilities at ~40% the API cost ($3/$15 per 1M tokens). 1M-token context. |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | — | 85.4% |
| GPQA-D | — | 85.8% |
| HumanEval | — | 95.9% |
| Aider | — | 83.6% |
| AIME-25 | — | 87.4% |
| LiveCB | — | 73.8% |
More like this
Looking for a different head-to-head? Build your own comparison on the multi-model tool.
Or see all Claude 4.5 Haiku details / Claude 4.6 Sonnet details.