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	GPT-5.5 OpenAI	Claude 4.6 Sonnet Anthropic	Gemini Omni Google	Gemini 3 Pro Google
Vendor	OpenAI	Anthropic	Google	Google
Family	GPT	Claude	Gemini	Gemini
Release date	2026-04-23	2026-02-17	2026-05-20	2026-04-22
Context window	400,000 tokens	1,000,000 tokens	1,000,000 tokens	2,000,000 tokens
Parameters	—	—	—	—
Modality	text, vision, audio	text, vision	text, vision, audio, video	text, vision, audio, video
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	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.	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.	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	87.6%	85.4%	—	87.1%
GPQA-D	89.4%	85.8%	—	88.6%
HumanEval	96.8%	95.9%	—	96.5%
Aider	89.7%	83.6%	—	84.8%
AIME-25	94.2%	87.4%	—	92.8%
LiveCB	78.9%	73.8%	—	76.1%
MMMU	78.4%	—	82.5%	84.3%