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	Llama 4 Scout Meta	Grok 4 xAI	Gemini Omni Google	GPT-5.5 OpenAI
Vendor	Meta	xAI	Google	OpenAI
Family	Llama	Grok	Gemini	GPT
Release date	2025-04-05	2025-07-09	2026-05-20	2026-04-23
Context window	10,000,000 tokens	256,000 tokens	1,000,000 tokens	400,000 tokens
Parameters	109B	—	—	—
Modality	text, vision	text	text, vision, audio, video	text, vision, audio
License	Llama 4 Community License	proprietary	proprietary	proprietary
Source	open weights	proprietary	proprietary	proprietary
Description	—	—	Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model.	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.
Links	weights →	vendor →	vendor →	vendor →
Benchmarks
MMLU-Pro	—	82.8%	—	87.6%
GPQA-D	—	87.5%	—	89.4%
HumanEval	—	—	—	96.8%
Aider	—	72.5%	—	89.7%
AIME-25	—	86.1%	—	94.2%
LiveCB	—	65.3%	—	78.9%
MMMU	—	—	82.5%	78.4%