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	Llama 4 Maverick Meta	DeepSeek-V4-Pro DeepSeek	GPT-5.5 OpenAI	DeepSeek-R1 DeepSeek
Vendor	Meta	DeepSeek	OpenAI	DeepSeek
Family	Llama	DeepSeek	GPT	DeepSeek
Release date	2025-04-05	2026-04-22	2026-04-23	2025-01-20
Context window	1,000,000 tokens	1,000,000 tokens	400,000 tokens	128,000 tokens
Parameters	400B	1.6T (49B active)	—	671B
Modality	text, vision	text	text, vision, audio	text
License	Llama 4 Community License	MIT	proprietary	MIT
Source	open weights	open weights	proprietary	open weights
Description	Mixture-of-experts open-weight model from Meta.	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.	Reasoning-focused open-weight model.
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