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	DeepSeek-V3.1 DeepSeek	Mistral Large 2 Mistral	GPT-5.5 OpenAI	DeepSeek-R1 DeepSeek
Vendor	DeepSeek	Mistral	OpenAI	DeepSeek
Family	DeepSeek	Mistral	GPT	DeepSeek
Release date	2025-08-21	2024-07-24	2026-04-23	2025-01-20
Context window	128,000 tokens	128,000 tokens	400,000 tokens	128,000 tokens
Parameters	671B	123B	—	671B
Modality	text	text	text, vision, audio	text
License	MIT	Mistral Research License	proprietary	MIT
Source	open weights	open weights	proprietary	open weights
Description	Large MoE open-weight model. Predecessor to DeepSeek-V4.	—	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.
Links	weights →	weights →	vendor →	weights →