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 GPT-5.5OpenAI |  Mistral Large 2Mistral |  Claude 4.6 SonnetAnthropic |  DeepSeek-R1DeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | Mistral | Anthropic | DeepSeek |
| Family | GPT | Mistral | Claude | DeepSeek |
| Release date | 2026-04-23 | 2024-07-24 | — | 2025-01-20 |
| Context window | 400,000 tokens | 128,000 tokens | 200,000 tokens | 128,000 tokens |
| Parameters | — | 123B | — | 671B |
| Modality | text, vision, audio | text | text, vision | text |
| License | proprietary | Mistral Research License | proprietary | MIT |
| Source | proprietary | open weights | 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. | — | — | Reasoning-focused open-weight model. |
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Llama 4 ScoutmaxLlama 4 MaverickmaxGemini 2.5 PromaxDeepSeek-R1✓Mistral Large 2✓Max 4 models. Remove one to add another.