GPT-5.6 Sol
GPT-5.6 Sol is the flagship of OpenAI’s GPT-5.6 family, released on July 9, 2026.
- Lab
- OpenAI
- Release date
- Status
- Generally available
- API model ID
- gpt-5.6-sol
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
OpenAI released GPT-5.6 Sol, the flagship of the GPT-5.6 family, on July 9, 2026, together with GPT-5.6 Terra and GPT-5.6 Luna. OpenAI’s model page lists it as gpt-5.6-sol (the gpt-5.6 alias also routes to it), with a 1,050,000-token context window, 128,000 max output tokens, text and image input with text output, and a February 16, 2026 knowledge cutoff.
In ChatGPT and Codex it is available to Plus, Pro, Business and Enterprise users, and developers can use it through the OpenAI API. GPT-6 Sol followed on September 22, 2026.
- Modalities
- Text and image input; text output
- Knowledge cutoff
- February 16, 2026
- Availability
- ChatGPT and Codex for Plus, Pro, Business and Enterprise users; OpenAI API.
- Official source
- openai.com
- Last checked
Questions
When was GPT-5.6 Sol released?
What is the knowledge cutoff of GPT-5.6 Sol?
What is the context window of GPT-5.6 Sol?
Does the gpt-5.6 alias point to GPT-5.6 Sol?
gpt-5.6 alias also routes to gpt-5.6-sol.Source
Release dates, model IDs and limits come from each lab’s own announcement, changelog, documentation or deprecations page, linked on every model with the date it was last checked. How we pick and check sources: editorial standards.