1 AI Catchup article about Sol, newest first: 1 news story.
In August 2026 OpenAI made GPT-5.6 Sol the single Chat experience for Plus and Pro, with a reasoning slider on web, mobile, and desktop, and moved Free and Go to GPT-5.6 Luna with unlimited text chats and a Think button. Since October 7, GPT-6 Sol and Luna are rolling out in their place.
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