GPT-6.1 Sol
GPT-6.1 Sol is an OpenAI model released on September 29, 2026, with the API ID gpt-6.1-sol.
- Lab
- OpenAI
- Release date
- Status
- Generally available
- API model ID
- gpt-6.1-sol
- Context window
- 1,050,000 tokens
- Max output
- 128,000 tokens
OpenAI released GPT-6.1 Sol on September 29, 2026, the date given in the OpenAI API changelog. In the API it is gpt-6.1-sol; OpenAI’s model docs list a 1,050,000-token context window, 128,000 max output tokens, text and image input with text output, and an April 30, 2026 knowledge cutoff.
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. It was presented at OpenAI DevDay 2026.
- Modalities
- Text and image input; text output
- Knowledge cutoff
- April 30, 2026
- Availability
- ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users (not yet in Chat); OpenAI API.
- Official source
- openai.com
- Last checked
Questions
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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.