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	Gemini 2.5 Flash Google	GPT-5.5 OpenAI	Gemini Omni Google	Gemini 3 Pro Google
Vendor	Google	OpenAI	Google	Google
Family	Gemini	GPT	Gemini	Gemini
Release date	2025-06-17	2026-04-23	2026-05-20	2026-04-22
Context window	1,000,000 tokens	400,000 tokens	1,000,000 tokens	2,000,000 tokens
Parameters	—	—	—	—
Modality	text, vision, audio	text, vision, audio	text, vision, audio, video	text, vision, audio, video
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	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.	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.	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%	—	87.1%
GPQA-D	—	89.4%	—	88.6%
HumanEval	—	96.8%	—	96.5%
Aider	—	89.7%	—	84.8%
AIME-25	—	94.2%	—	92.8%
LiveCB	—	78.9%	—	76.1%
MMMU	—	78.4%	82.5%	84.3%