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Gemini 3.5×

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	Gemini 3.5 Google	Grok 4 xAI	DeepSeek-V4-Pro DeepSeek	GPT-5.5 OpenAI
Vendor	Google	xAI	DeepSeek	OpenAI
Family	Gemini	Grok	DeepSeek	GPT
Release date	2026-05-20	2025-07-09	2026-04-22	2026-04-23
Context window	2,000,000 tokens	256,000 tokens	1,000,000 tokens	400,000 tokens
Parameters	—	—	1.6T (49B active)	—
Modality	text, vision, audio, video	text	text	text, vision, audio
License	proprietary	proprietary	MIT	proprietary
Source	proprietary	proprietary	open weights	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.	—	DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs.	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	vendor →	vendor →	weights →	vendor →
Benchmarks
MMLU-Pro	88.9%	82.8%	84.2%	87.6%
GPQA-D	91.2%	87.5%	82.4%	89.4%
HumanEval	—	—	95.1%	96.8%
Aider	—	72.5%	80.1%	89.7%
AIME-25	96.1%	86.1%	88.6%	94.2%
LiveCB	—	65.3%	72.4%	78.9%
MMMU	86.0%	—	—	78.4%