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	DeepSeek-V4-Pro DeepSeek	GPT-5.5 OpenAI	Mistral Large 2 Mistral	GPT-5 OpenAI
Vendor	DeepSeek	OpenAI	Mistral	OpenAI
Family	DeepSeek	GPT	Mistral	GPT
Release date	2026-04-22	2026-04-23	2024-07-24	2025-08-07
Context window	1,000,000 tokens	400,000 tokens	128,000 tokens	400,000 tokens
Parameters	1.6T (49B active)	—	123B	—
Modality	text	text, vision, audio	text	text, vision, audio
License	MIT	proprietary	Mistral Research License	proprietary
Source	open weights	proprietary	open weights	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.	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.	—	OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026.
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