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	Claude 4.6 Sonnet Anthropic	GPT-5 OpenAI	Gemini 3.5 Google	Gemini 3 Pro Google
Vendor	Anthropic	OpenAI	Google	Google
Family	Claude	GPT	Gemini	Gemini
Release date	2026-02-17	2025-08-07	2026-05-20	2026-04-22
Context window	1,000,000 tokens	400,000 tokens	2,000,000 tokens	2,000,000 tokens
Parameters	—	—	—	—
Modality	text, vision	text, vision, audio	text, vision, audio, video	text, vision, audio, video
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	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.	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 Superseded by GPT-5.5 in April 2026.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.	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 →	vendor →
Benchmarks
MMLU-Pro	85.4%	85.1%	88.9%	87.1%
GPQA-D	85.8%	87.3%	91.2%	88.6%
HumanEval	95.9%	95.2%	—	96.5%
Aider	83.6%	85.4%	—	84.8%
AIME-25	87.4%	91.0%	96.1%	92.8%
LiveCB	73.8%	74.5%	—	76.1%
MMMU	—	74.1%	86.0%	84.3%