OpenAI launches GPT-6 Sol and Luna on Sept. 22; prices and plan access unconfirmed

On Sept. 22, 2026, OpenAI published a post introducing two new models, GPT-6 Sol and GPT-6 Luna. OpenAI says the two models bring frontier intelligence to everyday work with different balances of capability and cost.

Source page not fetched (HTTP 403). Everything beyond OpenAI's one-line summary is unconfirmed, including prices, which plans get which model, and dates. What OpenAI has said is that there are two models: one leans toward capability and one toward lower cost. For an owner, the only question is whether either changes your bill or the quality of work you already give ChatGPT. Take an 18-person accounting firm with 6 staff on ChatGPT business seats, and assume $30 a seat a month, or $2,160 a year. If the cheaper model handles client emails and engagement-letter drafts as well as today's model, that bill should not move. If the stronger model sits behind a pricier tier, say $20 more per seat, upgrading all 6 costs $1,440 a year. That pays off only if it saves each person about 5 hours a year at $50 an hour. Firms that pay OpenAI per use through the API, or run software built on it, should care most. Owners who use ChatGPT a few times a week can ignore this until prices are published.