Compare models
Pick up to 4models. Specs render side-by-side. Share the URL — it's stateless.
 GPT-5OpenAI | o3 OpenAI |  Claude 4.5 HaikuAnthropic | |
|---|---|---|---|
| Vendor | OpenAI | OpenAI | Anthropic |
| Family | GPT | o-series | Claude |
| Release date | 2025-08-07 | 2025-04-16 | 2025-10-01 |
| Context window | 400,000 tokens | 200,000 tokens | 200,000 tokens |
| Parameters | — | — | — |
| Modality | text, vision, audio | text, vision | text, vision |
| License | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary |
| Description | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | Reasoning-focused model in the o-series. | Fast, cost-effective Claude model. |
| Links |
