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 GPT-5.5OpenAI |  DeepSeek-V4-FlashDeepSeek |  Mistral Large 2Mistral |  Llama 4 MaverickMeta | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | Mistral | Meta |
| Family | GPT | DeepSeek | Mistral | Llama |
| Release date | 2026-04-23 | 2026-04-22 | 2024-07-24 | 2025-04-05 |
| Context window | 400,000 tokens | 1,000,000 tokens | 128,000 tokens | 1,000,000 tokens |
| Parameters | — | 284B (13B active) | 123B | 400B |
| Modality | text, vision, audio | text | text | text, vision |
| License | proprietary | MIT | Mistral Research License | Llama 4 Community License |
| Source | proprietary | open weights | open weights | open weights |
| Description | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. | 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. | Mixture-of-experts open-weight model from Meta. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 87.6% | — | — | 80.5% |
| GPQA-D | 89.4% | — | — | — |
| HumanEval | 96.8% | — | 89.0% | — |
| Aider | 89.7% | — | — | — |
| AIME-25 | 94.2% | — | — | — |
| LiveCB | 78.9% | — | — | — |
| MMMU | 78.4% | — | — | 68.5% |
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