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 DeepSeek-V3.1DeepSeek |  GPT-5OpenAI | o3 OpenAI | |
|---|---|---|---|
| Vendor | DeepSeek | OpenAI | OpenAI |
| Family | DeepSeek | GPT | o-series |
| Release date | 2025-08-21 | 2025-08-07 | 2025-04-16 |
| Context window | 128,000 tokens | 400,000 tokens | 200,000 tokens |
| Parameters | 671B | — | — |
| Modality | text | text, vision, audio | text, vision |
| License | MIT | proprietary | proprietary |
| Source | open weights | proprietary | proprietary |
| Description | Large MoE open-weight model. Predecessor to DeepSeek-V4. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | Reasoning-focused model in the o-series. |
| Links | |||
| Benchmarks | |||
| MMLU-Pro | — | 85.1% | — |
| GPQA-D | — | 87.3% | 87.7% |
| HumanEval | — | 95.2% | — |
| Aider | — | 85.4% | — |
| AIME-25 | — | 91.0% | 88.9% |
| LiveCB | — | 74.5% | — |
| MMMU | — | 74.1% | — |
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Claude 4.8 Opus+
Qwen3.7-Max+
Gemini 3.5+Gemini Omni+GPT-5.5+Qwen3.6-27B+DeepSeek-V4-Flash+DeepSeek-V4-Pro+Gemini 3 Pro+Claude 4.7 Opus+Claude 4.6 Sonnet+Claude 4.5 Haiku+DeepSeek-V3.1✓GPT-5✓
Grok 4+Gemini 2.5 Flash+Qwen3 235B+o3✓GPT-4.1+
Llama 4 Scout+Llama 4 Maverick+Gemini 2.5 Pro+DeepSeek-R1+
Mistral Large 2+