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	GPT-5 OpenAI	Gemini 3.5 Google	Mistral Large 2 Mistral	Gemini 2.5 Flash Google
Vendor	OpenAI	Google	Mistral	Google
Family	GPT	Gemini	Mistral	Gemini
Release date	2025-08-07	2026-05-20	2024-07-24	2025-06-17
Context window	400,000 tokens	2,000,000 tokens	128,000 tokens	1,000,000 tokens
Parameters	—	—	123B	—
Modality	text, vision, audio	text, vision, audio, video	text	text, vision, audio
License	proprietary	proprietary	Mistral Research License	proprietary
Source	proprietary	proprietary	open weights	proprietary
Description	OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026.	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.	Google's cost-and-latency-optimized Gemini 2.5 variant. Generally available June 2025 — designed for high-throughput agentic workflows with sub-second first-token latency.
Links	vendor →	vendor →	vendor →weights →
Benchmarks
MMLU-Pro	85.1%	88.9%	—	—
GPQA-D	87.3%	91.2%	—	—
HumanEval	95.2%	—	89.0%	—
Aider	85.4%	—	—	—
AIME-25	91.0%	96.1%	—	—
LiveCB	74.5%	—	—	—
MMMU	74.1%	86.0%	—	—