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GPT-5.6 Sol×

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	GPT-5.6 Sol OpenAI	GPT-5 Pro OpenAI	Gemini Omni Google	Gemini 3.5 Google
Vendor	OpenAI	OpenAI	Google	Google
Family	GPT	GPT	Gemini	Gemini
Release date	2026-06-26	2025-08-07	2026-05-20	2026-05-20
Context window	—	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	Flagship of OpenAI's GPT-5.6 three-model suite (Sol / Terra / Luna), released as a limited preview. Strong gains in coding, cybersecurity, biology, and long-horizon agentic work. Pricing: $5 / $30 per million input/output tokens.	Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth.	Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model.	Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026.
Links	vendor →	vendor →	vendor →	vendor →
Benchmarks
MMLU-Pro	—	—	—	88.9%
GPQA-D	—	—	—	91.2%
AIME-25	—	—	—	96.1%
MMMU	—	—	82.5%	86.0%