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	Gemini 3.5 Google	Llama 4 Maverick Meta	GPT-5 OpenAI	Grok 4 xAI
Vendor	Google	Meta	OpenAI	xAI
Family	Gemini	Llama	GPT	Grok
Release date	2026-05-20	2025-04-05	2025-08-07	2025-07-09
Context window	2,000,000 tokens	1,000,000 tokens	400,000 tokens	256,000 tokens
Parameters	—	400B	—	—
Modality	text, vision, audio, video	text, vision	text, vision, audio	text
License	proprietary	Llama 4 Community License	proprietary	proprietary
Source	proprietary	open weights	proprietary	proprietary
Description	Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026.	Mixture-of-experts open-weight model from Meta.	OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026.	—
Links	vendor →	weights →	vendor →	vendor →
Benchmarks
MMLU-Pro	88.9%	80.5%	85.1%	82.8%
GPQA-D	91.2%	—	87.3%	87.5%
HumanEval	—	—	95.2%	—
Aider	—	—	85.4%	72.5%
AIME-25	96.1%	—	91.0%	86.1%
LiveCB	—	—	74.5%	65.3%
MMMU	86.0%	68.5%	74.1%	—