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 GPT-5.5OpenAI | o3 OpenAI |  Qwen3 235BAlibaba |  DeepSeek-V3.1DeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | Alibaba | DeepSeek |
| Family | GPT | o-series | Qwen | DeepSeek |
| Release date | 2026-04-23 | 2025-04-16 | 2025-04-29 | 2025-08-21 |
| Context window | 400,000 tokens | 200,000 tokens | 128,000 tokens | 128,000 tokens |
| Parameters | — | — | 235B | 671B |
| Modality | text, vision, audio | text, vision | text | text |
| License | proprietary | proprietary | Apache-2.0 | MIT |
| Source | proprietary | proprietary | 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. | Reasoning-focused model in the o-series. | Predecessor to the Qwen3.6 family. | Large MoE open-weight model. Predecessor to DeepSeek-V4. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 87.6% | — | — | — |
| GPQA-D | 89.4% | 87.7% | — | — |
| HumanEval | 96.8% | — | — | — |
| Aider | 89.7% | — | — | — |
| AIME-25 | 94.2% | 88.9% | — | — |
| LiveCB | 78.9% | — | — | — |
| MMMU | 78.4% | — | — | — |
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