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GPT-6 Sol
OpenAI · GPT-6
OpenAI released GPT-6 Sol on September 22, 2026.
GPT-6 Sol is the OpenAI reasoning model released on September 22, 2026 alongside GPT-6 Luna. It accepts text and image input and generates text through the Responses and Chat Completions APIs, and reached Codex and ChatGPT Work the same day. Standard pricing for prompts up to 272K input tokens is $2 per million input tokens, $0.20 cached input and $10 output. On September 25 OpenAI fixed an image encoding bug that had degraded image understanding in Sol and Luna, and recommended rerunning image-based evaluations. Its successor, GPT-6.1 Sol, followed a week later.
GPT-6 Sol at a glance
- Released
- API model id
gpt-6-sol- Available on
- OpenAI APICodexChatGPT Work
- Previous model
- GPT-5.6 (July 9, 2026)
- Announcement
- developers.openai.com
What changed from GPT-5.6
GPT-6 Sol succeeds GPT-5.6 Sol in OpenAI's Sol tier, now as a GPT-6 reasoning model available in both the API and Codex. Pricing is listed per 1M tokens for prompts up to 272K input tokens, with separate rates for longer prompts and other processing tiers.
New to model names and version numbers? Read how AI labs version their models.
GPT-6 Sol release timeline
The launch and every later OpenAI release that mentions GPT-6 Sol, oldest first.
- Released GPT-6 Sol and GPT-6 Luna
Released GPT-6 Sol (gpt-6-sol) and GPT-6 Luna (gpt-6-luna). These reasoning models accept text and image inputs and generate text through the Responses and Chat Completions APIs. Standard pricing per 1M tokens for prompts with up to 272K input tokens: GPT-6 Sol: $2 input, $0.20…
Source: OpenAI API Changelog - GPT-6 Sol and GPT-6 Luna in Codex and ChatGPT Work
GPT-6 Sol and GPT-6 Luna are rolling out to Codex and ChatGPT Work at lower token prices than their GPT-5.6 predecessors. Use Sol for complex coding and agentic workflows, and Luna for focused, high-volume tasks. Select with /model or codex --model gpt-6-sol / gpt-6-luna.
Source: Codex Changelog - Codex CLI 0.157: GPT-6 Sol and Luna, fullscreen transcripts
Added GPT-6 Sol and Luna, including Amazon Bedrock support and migration prompts for older models. Enabled fullscreen transcripts by default and added Shift-click to extend text selections. Enabled automatic background-server startup for eligible interactive sessions, with recov…
Source: Codex Changelog - Image encoding fix for GPT-6 Sol and GPT-6 Luna
Fixed a bug in image encoding that degraded image understanding in GPT-6 Sol and GPT-6 Luna. This update improves results on visual tasks in the API and Codex, including computer use. If your use cases involve image inputs, we recommend rerunning your evaluations and retrying wo…
Source: OpenAI API Changelog
GPT-6 Sol FAQ
When was GPT-6 Sol released?
OpenAI released GPT-6 Sol on September 22, 2026. The launch entry below links to the official announcement.
Where is GPT-6 Sol available?
GPT-6 Sol is available on OpenAI API, Codex and ChatGPT Work. Later availability changes are listed under follow-up releases on this page.
What is the GPT-6 Sol API model id?
Use gpt-6-sol in OpenAI's API.
What came before GPT-6 Sol?
GPT-6 Sol follows GPT-5.6, released on July 9, 2026.
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