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Claude 4.6 Sonnet×

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	Claude 4.6 Sonnet Anthropic	Gemini Omni Google	Mistral Large 2 Mistral	GPT-5.5 OpenAI
Vendor	Anthropic	Google	Mistral	OpenAI
Family	Claude	Gemini	Mistral	GPT
Release date	2026-02-17	2026-05-20	2024-07-24	2026-04-23
Context window	1,000,000 tokens	1,000,000 tokens	128,000 tokens	400,000 tokens
Parameters	—	—	123B	—
Modality	text, vision	text, vision, audio, video	text	text, vision, audio
License	proprietary	proprietary	Mistral Research License	proprietary
Source	proprietary	proprietary	open weights	proprietary
Description	Anthropic's mid-tier flagship — released 12 days after Opus 4.6 and matching most of its capabilities at ~40% the API cost ($3/$15 per 1M tokens). 1M-token context.	Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model.	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.
Links		vendor →	vendor →weights →	vendor →
Benchmarks
MMLU-Pro	85.4%	—	—	87.6%
GPQA-D	85.8%	—	—	89.4%
HumanEval	95.9%	—	89.0%	96.8%
Aider	83.6%	—	—	89.7%
AIME-25	87.4%	—	—	94.2%
LiveCB	73.8%	—	—	78.9%
MMMU	—	82.5%	—	78.4%