OpenAI introduces GPT-6 Sol and GPT-6 Luna
OpenAI announced GPT-6 Sol and Luna on September 22. The company says both are available through its API and Codex, with different capability and cost profiles.
What was announced
OpenAI introduced GPT-6 Sol and GPT-6 Luna as additions to the GPT-6 family. The September 22, 2026 update on its GPT-6 Astra announcement also links to this release.
Availability and pricing
OpenAI says Sol and Luna are available in Codex and ChatGPT Work for eligible plans, and through its API as gpt-6-sol and gpt-6-luna. It lists GPT-6 Sol API prices at $2 per million input tokens and $10 per million output tokens. These figures are the company’s published prices, not an independent comparison.
Read OpenAI’s announcement and model documentation for current availability and limits.
Read the cited source
This article summarizes its cited source. Its claims have not been independently verified.