GPT-5.6 Sol
Flagship of OpenAI's GPT-5.6 series, aimed at complex reasoning, coding, and agentic workflows, with particular strength in command-line and multi-step coding tasks.
Pricing
Input$5 / 1M checked Jul 19, 2026
Output$30 / 1M checked Jul 19, 2026
A Pro serving mode (reasoning.mode=pro) is available at the same list price.
Cost bandPremium
Free tierNo free API tier.
Limits
Context window1M checked Jul 19, 2026
DeploymentOpenAI API
OpenAI-compatible APIYes
ModalitiesText, Image input, PDF input
Where it fits
Best forComplex agents, hard coding tasks, multi-step tool orchestration.
Business fitOpenAI's top tier; priced above GPT-5.1 with a larger context window.
Capabilities
Reasoning modesFunction callingStructured outputsWeb searchMCP
Change history
- Jul 9, 2026New modelGPT-5.6 Sol added to the index $5 / 1M in / $30 / 1M out, 1M context. Sol tier of the GPT-5.6 series. OpenAI models index
Data
Last checkedJul 19, 2026
Cross-checked againstopenrouter.ai/openai/gpt-5.6-sol
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