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GPT-5.6 Sol×

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	GPT-5.6 Sol OpenAI	Grok 4 xAI	Claude 4.7 Opus Anthropic	Gemini Omni Google
Vendor	OpenAI	xAI	Anthropic	Google
Family	GPT	Grok	Claude	Gemini
Release date	2026-06-26	2025-07-09	2026-04-16	2026-05-20
Context window	—	256,000 tokens	1,000,000 tokens	1,000,000 tokens
Parameters	—	—	—	—
Modality	text, vision, audio	text	text, vision	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.	—	Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle).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.	Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model.
Links	vendor →	vendor →	vendor →	vendor →
Benchmarks
MMLU-Pro	—	82.8%	88.2%	—
GPQA-D	—	87.5%	90.1%	—
HumanEval	—	—	97.4%	—
Aider	—	72.5%	91.2%	—
AIME-25	—	86.1%	93.5%	—
LiveCB	—	65.3%	80.2%	—
MMMU	—	—	79.0%	82.5%