OpenAI
OpenAI: GPT-5.6 Sol
openai/gpt-5.6-sol
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks and long-horizon problem solving.
Input
$4
/ 1M tokens
Output
$20
/ 1M tokens
Context window
1.05M
tokens
Limits
Context
1,050,000
tokens
Max output
128,000
12% of the context window
Model facts
Author
OpenAI
Tokenizer
GPT
Modality
Text + Image + File -> Text
Knowledge cutoff
2026-02-16
Created
Jul 9, 2026
Reasoning
Default MediumMaxXhighHighMediumLowNone
Publication status
Hugging Face: not mappedLicense: not publishedParameter count: not published
Modalities
Input · FileInput · ImageInput · TextOutput · Text
Generation controls
Include reasoningMax completion tokensMax tokensReasoningReasoning effortResponse formatSeedStructured outputsTool choiceToolsVerbosity
Capability scores
50.2
Agentic index
Better than 86% of models compared
77.4
Coding index
Better than 96% of models compared
47
Intelligence index
Better than 92% of models compared