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Gemini 3.5×

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	Gemini 3.5 Google	GPT-5.5 OpenAI	Grok 4 xAI	Llama 4 Maverick Meta
Vendor	Google	OpenAI	xAI	Meta
Family	Gemini	GPT	Grok	Llama
Release date	2026-05-20	2026-04-23	2025-07-09	2025-04-05
Context window	2,000,000 tokens	400,000 tokens	256,000 tokens	1,000,000 tokens
Parameters	—	—	—	400B
Modality	text, vision, audio, video	text, vision, audio	text	text, vision
License	proprietary	proprietary	proprietary	Llama 4 Community License
Source	proprietary	proprietary	proprietary	open weights
Description	Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026.	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.
Links	vendor →	vendor →	vendor →	weights →
Benchmarks
MMLU-Pro	88.9%	87.6%	82.8%	80.5%
GPQA-D	91.2%	89.4%	87.5%	—
HumanEval	—	96.8%	—	—
Aider	—	89.7%	72.5%	—
AIME-25	96.1%	94.2%	86.1%	—
LiveCB	—	78.9%	65.3%	—
MMMU	86.0%	78.4%	—	68.5%