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 GPT-5.5OpenAI |  Grok 4xAI |  Gemini 3 Pro |  Mistral Large 2Mistral | |
|---|---|---|---|---|
| Vendor | OpenAI | xAI | Mistral | |
| Family | GPT | Grok | Gemini | Mistral |
| Release date | 2026-04-23 | 2025-07-09 | 2026-04-22 | 2024-07-24 |
| Context window | 400,000 tokens | 256,000 tokens | 2,000,000 tokens | 128,000 tokens |
| Parameters | — | — | — | 123B |
| Modality | text, vision, audio | text | text, vision, audio, video | text |
| License | proprietary | proprietary | proprietary | Mistral Research License |
| Source | proprietary | proprietary | proprietary | 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. | — | Google DeepMind's flagship multimodal model. Best-in-class for multimodal understanding and agentic / vibe coding workflows. A "Deep Think" reasoning mode is available to AI Ultra subscribers. | — |
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