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 Gemini 3.5 Flash |  o3OpenAI | GPT-5.5 OpenAI |  DeepSeek-V3.1DeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | DeepSeek | |
| Family | Gemini | o-series | GPT | DeepSeek |
| Release date | 2026-05-20 | 2025-04-16 | 2026-04-23 | 2025-08-21 |
| Context window | — | 200,000 tokens | 400,000 tokens | 128,000 tokens |
| Parameters | — | — | — | 671B |
| Modality | text, vision, audio | text, vision | text, vision, audio | text |
| License | proprietary | proprietary | proprietary | MIT |
| Source | proprietary | proprietary | proprietary | open weights |
| Description | Fast, low-cost tier of the Gemini 3.5 family announced at Google I/O 2026. June 2026 update added native computer-use capability, moving Flash from generation to agentic task execution. | Reasoning-focused model in the o-series. | 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. | Large MoE open-weight model. Predecessor to DeepSeek-V4. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 87.6% | — |
| GPQA-D | — | 87.7% | 89.4% | — |
| HumanEval | — | — | 96.8% | — |
| Aider | — | — | 89.7% | — |
| AIME-25 | — | 88.9% | 94.2% | — |
| LiveCB | — | — | 78.9% | — |
| MMMU | — | — | 78.4% | — |
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GPT-5.6 Solmax
Claude 4.8 Opusmax
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Mistral Large 2maxMax 4 models. Remove one to add another.