Compare models
Pick up to 4models. Specs render side-by-side. Share the URL — it's stateless.
 o3OpenAI |  DeepSeek-V3.1DeepSeek | DeepSeek-R1 DeepSeek | |
|---|---|---|---|
| Vendor | OpenAI | DeepSeek | DeepSeek |
| Family | o-series | DeepSeek | DeepSeek |
| Release date | 2025-04-16 | 2025-08-21 | 2025-01-20 |
| Context window | 200,000 tokens | 128,000 tokens | 128,000 tokens |
| Parameters | — | 671B | 671B |
| Modality | text, vision | text | text |
| License | proprietary | MIT | MIT |
| Source | proprietary | open weights | open weights |
| Description | Reasoning-focused model in the o-series. | Large MoE open-weight model. Predecessor to DeepSeek-V4. | Reasoning-focused open-weight model. |
| Links |
