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 DeepSeek-V4-ProDeepSeek |  o3OpenAI | GPT-5.5 OpenAI |  Grok 4xAI | |
|---|---|---|---|---|
| Vendor | DeepSeek | OpenAI | OpenAI | xAI |
| Family | DeepSeek | o-series | GPT | Grok |
| Release date | 2026-04-22 | 2025-04-16 | 2026-04-23 | 2025-07-09 |
| Context window | 1,000,000 tokens | 200,000 tokens | 400,000 tokens | 256,000 tokens |
| Parameters | 1.6T (49B active) | — | — | — |
| Modality | text | text, vision | text, vision, audio | text |
| License | MIT | proprietary | proprietary | proprietary |
| Source | open weights | proprietary | 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 Flashmax
Claude 4.6 SonnetmaxGPT-5.5✓DeepSeek-V4-Flashmax
Qwen3.6-27BmaxGemini 3 PromaxDeepSeek-V4-Pro✓Claude 4.7 OpusmaxClaude 4.5 HaikumaxDeepSeek-V3.1maxGPT-5maxGrok 4✓Qwen3 235Bmaxo3✓GPT-4.1max
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Mistral Large 2maxMax 4 models. Remove one to add another.