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 o3OpenAI |  Gemini 3.5 | GPT-5 OpenAI |  Mistral Large 2Mistral | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | Mistral | |
| Family | o-series | Gemini | GPT | Mistral |
| Release date | 2025-04-16 | 2026-05-20 | 2025-08-07 | 2024-07-24 |
| Context window | 200,000 tokens | 2,000,000 tokens | 400,000 tokens | 128,000 tokens |
| Parameters | — | — | — | 123B |
| Modality | text, vision | text, vision, audio, video | text, vision, audio | text |
| License | proprietary | proprietary | proprietary | Mistral Research License |
| Source | proprietary | proprietary | proprietary | open weights |
| Description | Reasoning-focused model in the o-series. | Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | 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. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 88.9% | 85.1% | — |
| GPQA-D | 87.7% | 91.2% | 87.3% | — |
| HumanEval | — | — | 95.2% | 89.0% |
| Aider | — | — | 85.4% | — |
| AIME-25 | 88.9% | 96.1% | 91.0% | — |
| LiveCB | — | — | 74.5% | — |
| MMMU | — | 86.0% | 74.1% | — |
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