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 DeepSeek-V4-ProDeepSeek |  Grok 4xAI |  GPT-5.5OpenAI | o3 OpenAI | |
|---|---|---|---|---|
| Vendor | DeepSeek | xAI | OpenAI | OpenAI |
| Family | DeepSeek | Grok | GPT | o-series |
| Release date | 2026-04-22 | 2025-07-09 | 2026-04-23 | 2025-04-16 |
| Context window | 1,000,000 tokens | 256,000 tokens | 400,000 tokens | 200,000 tokens |
| Parameters | 1.6T (49B active) | — | — | — |
| Modality | text | text | text, vision, audio | text, vision |
| License | MIT | proprietary | proprietary | proprietary |
| Source | open weights | proprietary | proprietary | proprietary |
| Description | DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs. | — | 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. | Reasoning-focused model in the o-series. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 84.2% | 82.8% | 87.6% | — |
| GPQA-D | 82.4% | 87.5% | 89.4% | 87.7% |
| HumanEval | 95.1% | — | 96.8% | — |
| Aider | 80.1% | 72.5% | 89.7% | — |
| AIME-25 | 88.6% | 86.1% | 94.2% | 88.9% |
| LiveCB | 72.4% | 65.3% | 78.9% | — |
| MMMU | — | — | 78.4% | — |
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Mistral Large 2maxMax 4 models. Remove one to add another.