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GPT-5 Pro×

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	GPT-5 Pro OpenAI	Mistral Large 2 Mistral	DeepSeek-R1 DeepSeek	Gemini 3.5 Flash Google
Vendor	OpenAI	Mistral	DeepSeek	Google
Family	GPT	Mistral	DeepSeek	Gemini
Release date	2025-08-07	2024-07-24	2025-01-20	2026-05-20
Context window	400,000 tokens	128,000 tokens	128,000 tokens	—
Parameters	—	123B	671B	—
Modality	text, vision, audio	text	text	text, vision, audio
License	proprietary	Mistral Research License	MIT	proprietary
Source	proprietary	open weights	open weights	proprietary
Description	Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth.	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.	Reasoning-focused open-weight model.	Fast, low-cost tier of the Gemini 3.5 family announced at Google I/O 2026. June 2026 update added native computer-use capability, moving Flash from generation to agentic task execution.
Links	vendor →	vendor →weights →	weights →	vendor →
Benchmarks
HumanEval	—	89.0%	—	—
AIME-25	—	—	79.8%	—