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	o3 OpenAI	GPT-5 Pro OpenAI	GPT-5.6 Sol OpenAI	Claude 4.7 Opus Anthropic
Vendor	OpenAI	OpenAI	OpenAI	Anthropic
Family	o-series	GPT	GPT	Claude
Release date	2025-04-16	2025-08-07	2026-06-26	2026-04-16
Context window	200,000 tokens	400,000 tokens	—	1,000,000 tokens
Parameters	—	—	—	—
Modality	text, vision	text, vision, audio	text, vision, audio	text, vision
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	Reasoning-focused model in the o-series.	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.	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	Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle).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.
Links		vendor →	vendor →	vendor →
Benchmarks
MMLU-Pro	—	—	—	88.2%
GPQA-D	87.7%	—	—	90.1%
HumanEval	—	—	—	97.4%
Aider	—	—	—	91.2%
AIME-25	88.9%	—	—	93.5%
LiveCB	—	—	—	80.2%
MMMU	—	—	—	79.0%