GPT-6 Sol
GPT-6 Sol is an OpenAI reasoning model released on September 22, 2026, with the API ID gpt-6-sol.
- Lab
- OpenAI
- Release date
- Status
- Generally available
- API model ID
- gpt-6-sol
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
OpenAI released GPT-6 Sol on September 22, 2026, together with GPT-6 Luna; the OpenAI API changelog describes both as reasoning models that accept text and images. In the API it is gpt-6-sol, with a 1,050,000-token context window, 128,000 max output tokens and an April 20, 2026 knowledge cutoff per OpenAI’s model page.
In ChatGPT it is available to Plus, Pro, Business, Enterprise and Edu users in ChatGPT Work and Codex, and OpenAI says it is not yet available in Chat. Our coverage: OpenAI releases GPT-6 Sol and GPT-6 Luna.
- Modalities
- Text and image input; text output
- Knowledge cutoff
- April 20, 2026
- Availability
- ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users (not yet in Chat); OpenAI API (Responses and Chat Completions).
- Official source
- openai.com
- Last checked
Questions
When was GPT-6 Sol released?
Is GPT-6 Sol available in ChatGPT?
What is the context window of GPT-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.