openai/gpt-5.6-solGPT-5.6 Sol is OpenAI’s proprietary AI model, released Jul 9, 2026. It costs $4/M input and $20/M output tokens, and handles a 1.1M-token context window. Its strongest use case is math, where it ranks in the 91st percentile of the models Model Beat tracks.
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.6 Sol lands among all models tracked on Model Beat.
Abstract visual reasoning
Harder abstract reasoning
Graduate-level scientific reasoning
Frontier of human expert knowledge
Common-sense trick questions
Factual accuracy & hallucination
Novel ML problem-solving
Code performance optimization
Scientific research coding
Human-rated web development
Olympiad-qualifier math
Multi-step agentic tasks
Tool-agent-user reliability
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series.
GPT-5.6 Sol is an AI model developed by OpenAI, part of the GPT family, released Jul 9, 2026.
GPT-5.6 Sol's list price from OpenAI is $4 per million input tokens and $20 per million output tokens.
GPT-5.6 Sol supports a context window of up to 1.1M tokens.
On standardized evaluations tracked by Epoch AI, GPT-5.6 Sol scores 49.5% on Humanity's Last Exam, 92.5% on ARC-AGI-2, 89.4% on WeirdML.
GPT-5.6 Sol is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Oct 6, 2026.