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	GPT-5.5 OpenAI	Gemini 3.5 Google	Gemini 3 Pro Google	Llama 4 Maverick Meta
Vendor	OpenAI	Google	Google	Meta
Family	GPT	Gemini	Gemini	Llama
Release date	2026-04-23	2026-05-20	2026-04-22	2025-04-05
Context window	400,000 tokens	2,000,000 tokens	2,000,000 tokens	1,000,000 tokens
Parameters	—	—	—	400B
Modality	text, vision, audio	text, vision, audio, video	text, vision, audio, video	text, vision
License	proprietary	proprietary	proprietary	Llama 4 Community License
Source	proprietary	proprietary	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.	Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026.	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.	Mixture-of-experts open-weight model from Meta.
Links	vendor →	vendor →	vendor →	weights →
Benchmarks
MMLU-Pro	87.6%	88.9%	87.1%	80.5%
GPQA-D	89.4%	91.2%	88.6%	—
HumanEval	96.8%	—	96.5%	—
Aider	89.7%	—	84.8%	—
AIME-25	94.2%	96.1%	92.8%	—
LiveCB	78.9%	—	76.1%	—
MMMU	78.4%	86.0%	84.3%	68.5%