GPT 5.6 Sol
GPT 5.6 Sol is an AI model from OpenAI, available on ZeroTwo. It costs $4.00 per million input tokens and $20.00 per million output tokens, has a 1,050,000-token context window, can return up to 128,000 output tokens, and has a knowledge cutoff of February 16, 2026.
GPT-5.6 Sol is an OpenAI reasoning model for complex coding, research, and multi-step analysis.
Requests above 272,000 input tokens move the whole request to long-context rates: $8.00 input and $30.00 output per million tokens. The $4.00 input and $20.00 output rates are promotional and are guaranteed only through November 21, 2026; OpenAI has not published the rate that applies after that date, and the pre-promotion rate was $5.00 input and $30.00 output per million tokens.
Questions
How much does GPT 5.6 Sol cost?
GPT 5.6 Sol is priced at $4.00 per million input tokens and $20.00 per million output tokens. On ZeroTwo it is included in your plan's credits rather than billed per token.
What is GPT 5.6 Sol's context window?
GPT 5.6 Sol accepts up to 1,050,000 tokens of context and can return up to 128,000 output tokens.
What is GPT 5.6 Sol's knowledge cutoff date?
GPT 5.6 Sol has a training knowledge cutoff of February 16, 2026. For anything later than that, use a model with web search enabled.
Can I use GPT 5.6 Sol for free?
You can try GPT 5.6 Sol on ZeroTwo's free plan, which includes a monthly credit allowance across every model in the catalogue. Heavier use moves to a paid plan rather than a per-token bill.