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	GPT-5.5 OpenAI	Llama 4 Maverick Meta	Gemini 3 Pro Google	DeepSeek-V3.1 DeepSeek
Vendor	OpenAI	Meta	Google	DeepSeek
Family	GPT	Llama	Gemini	DeepSeek
Release date	2026-04-23	2025-04-05	2026-04-22	2025-08-21
Context window	400,000 tokens	1,000,000 tokens	2,000,000 tokens	128,000 tokens
Parameters	—	400B	—	671B
Modality	text, vision, audio	text, vision	text, vision, audio, video	text
License	proprietary	Llama 4 Community 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.	Mixture-of-experts open-weight model from Meta.	Google DeepMind's flagship multimodal model. Best-in-class for multimodal understanding and agentic / vibe coding workflows. A "Deep Think" reasoning mode is available to AI Ultra subscribers.	Large MoE open-weight model. Predecessor to DeepSeek-V4.
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