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	Gemini 3.5 Google	Mistral Large 2 Mistral	GPT-5.5 OpenAI	Gemini 3 Pro Google
Vendor	Google	Mistral	OpenAI	Google
Family	Gemini	Mistral	GPT	Gemini
Release date	2026-05-20	2024-07-24	2026-04-23	2026-04-22
Context window	2,000,000 tokens	128,000 tokens	400,000 tokens	2,000,000 tokens
Parameters	—	123B	—	—
Modality	text, vision, audio, video	text	text, vision, audio	text, vision, audio, video
License	proprietary	Mistral Research 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.	Large text-only Mistral model with a 128K context window and 123B parameters, tuned for strong instruction following and long-context reasoning. Mistral's flagship open-weights release in the Large 2 line.	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 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.
Links	vendor →	vendor →weights →	vendor →	vendor →
Benchmarks
MMLU-Pro	88.9%	—	87.6%	87.1%
GPQA-D	91.2%	—	89.4%	88.6%
HumanEval	—	89.0%	96.8%	96.5%
Aider	—	—	89.7%	84.8%
AIME-25	96.1%	—	94.2%	92.8%
LiveCB	—	—	78.9%	76.1%
MMMU	86.0%	—	78.4%	84.3%