Claude 4.5 Haiku vs GPT-5
Direct spec comparison of Claude 4.5 Haiku (from Anthropic) and GPT-5 (from OpenAI). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.5 HaikuAnthropic |  GPT-5OpenAI | |
|---|---|---|
| Vendor | Anthropic | OpenAI |
| Family | Claude | GPT |
| Release date | 2025-10-01 | 2025-08-07 |
| Context window | 200,000 tokens | 400,000 tokens |
| Parameters | — | — |
| Modality | text, vision | text, vision, audio |
| License | proprietary | proprietary |
| Source | proprietary | proprietary |
| Description | Fast, cost-effective Claude model. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | — | 85.1% |
| GPQA-D | — | 87.3% |
| HumanEval | — | 95.2% |
| Aider | — | 85.4% |
| AIME-25 | — | 91.0% |
| LiveCB | — | 74.5% |
| MMMU | — | 74.1% |
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