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GPT-5 Pro×

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	GPT-5 Pro OpenAI	Mistral Large 2 Mistral	DeepSeek-V4-Flash DeepSeek	Grok 4 xAI
Vendor	OpenAI	Mistral	DeepSeek	xAI
Family	GPT	Mistral	DeepSeek	Grok
Release date	2025-08-07	2024-07-24	2026-04-22	2025-07-09
Context window	400,000 tokens	128,000 tokens	1,000,000 tokens	256,000 tokens
Parameters	—	123B	284B (13B active)	—
Modality	text, vision, audio	text	text	text
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.	Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE.	—
Links	vendor →	vendor →weights →	weights →	vendor →
Benchmarks
MMLU-Pro	—	—	—	82.8%
GPQA-D	—	—	—	87.5%
HumanEval	—	89.0%	—	—
Aider	—	—	—	72.5%
AIME-25	—	—	—	86.1%
LiveCB	—	—	—	65.3%