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	Gemini 3 Pro Google	Claude 4.7 Opus Anthropic	Grok 4 xAI	GPT-5.5 OpenAI
Vendor	Google	Anthropic	xAI	OpenAI
Family	Gemini	Claude	Grok	GPT
Release date	2026-04-22	2026-04-16	2025-07-09	2026-04-23
Context window	2,000,000 tokens	1,000,000 tokens	256,000 tokens	400,000 tokens
Parameters	—	—	—	—
Modality	text, vision, audio, video	text, vision	text	text, vision, audio
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	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.	Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle). Optimized for complex reasoning and coding. Improved software engineering, long-running coding tasks, and higher-resolution vision over Claude 4.6.	—	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 →	vendor →	vendor →
Benchmarks
MMLU-Pro	87.1%	88.2%	82.8%	87.6%
GPQA-D	88.6%	90.1%	87.5%	89.4%
HumanEval	96.5%	97.4%	—	96.8%
Aider	84.8%	91.2%	72.5%	89.7%
AIME-25	92.8%	93.5%	86.1%	94.2%
LiveCB	76.1%	80.2%	65.3%	78.9%
MMMU	84.3%	79.0%	—	78.4%