Cheaper than Astra for coding agents, but OpenAI already points to GPT-6.1 Sol at the same price, so start there.

Kenning's take

What it does

GPT-6 Sol is OpenAI's GPT-6 model for complex coding and agent workflows, priced below GPT-6 Astra. It launched in the API and rolled out to ChatGPT Work and Codex for paid plans in September 2026. OpenAI now points to GPT-6.1 Sol as the newer Sol model.

• 1.05M-token context window
• Reasoning effort from none to max
• Text and image input
• Responses and Chat Completions APIs

Who it suits. Developers running coding agents who want a cheaper option than Astra.

Key facts

Category

AI models

Part of

ChatGPT

Made by

OpenAI

Based in

United States

Released

22 September 2026

How to get it

OpenAI API (model gpt-6-sol); ChatGPT Work and Codex on Plus, Pro, Business, Enterprise and Edu (not in ChatGPT Chat)

Works on

ChatGPT Work and Codex, API

In the UK

Yes

API price

$2 per million input tokens, $10 per million output

FAQ

Facts from the maker's own pages and the sources listed. Checked 2026-10-11.