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 o3OpenAI |  Mistral Large 2Mistral | GPT-5 OpenAI |  DeepSeek-V4-FlashDeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | Mistral | OpenAI | DeepSeek |
| Family | o-series | Mistral | GPT | DeepSeek |
| Release date | 2025-04-16 | 2024-07-24 | 2025-08-07 | 2026-04-22 |
| Context window | 200,000 tokens | 128,000 tokens | 400,000 tokens | 1,000,000 tokens |
| Parameters | — | 123B | — | 284B (13B active) |
| Modality | text, vision | text | text, vision, audio | text |
| License | proprietary | Mistral Research License | proprietary | MIT |
| Source | proprietary | open weights | proprietary | open weights |
| Description | Reasoning-focused model in the o-series. | Large text-only Mistral model with a 128K context window and 123B parameters, tuned for strong instruction following and long-context reasoning. Mistral's flagship open-weights release in the Large 2 line. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 85.1% | — |
| GPQA-D | 87.7% | — | 87.3% | — |
| HumanEval | — | 89.0% | 95.2% | — |
| Aider | — | — | 85.4% | — |
| AIME-25 | 88.9% | — | 91.0% | — |
| LiveCB | — | — | 74.5% | — |
| MMMU | — | — | 74.1% | — |
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