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 Gemini 2.5 Flash |  DeepSeek-V4-ProDeepSeek |  o3OpenAI | GPT-5.5 OpenAI | |
|---|---|---|---|---|
| Vendor | DeepSeek | OpenAI | OpenAI | |
| Family | Gemini | DeepSeek | o-series | GPT |
| Release date | — | 2026-04-22 | 2025-04-16 | 2026-04-23 |
| Context window | 1,000,000 tokens | 1,000,000 tokens | 200,000 tokens | 400,000 tokens |
| Parameters | — | 1.6T (49B active) | — | — |
| Modality | text, vision, audio | text | text, vision | text, vision, audio |
| License | proprietary | MIT | proprietary | proprietary |
| Source | proprietary | open weights | 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. | 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. |
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Gemini 2.5 Flash✓
Claude 4.6 SonnetmaxGPT-5.5✓DeepSeek-V4-Flashmax
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Grok 4maxQwen3 235Bmaxo3✓GPT-4.1max
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Mistral Large 2maxMax 4 models. Remove one to add another.