GPT-6 Sol and GPT-6 Luna are available in the API
GPT-6 Sol and GPT-6 Luna are available in the API and are rolling out in Codex and ChatGPT Work for Plus, Pro, Business, and Enterprise users.
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View all AI newsGPT-6 Sol and Luna launch with API prices 50% lower than GPT-5.6
OpenAI Developers said on September 22, 2026, that both models were launching that day, with API prices 50% lower than GPT-5.6.
GPT-6 Sol and Luna roll out in ChatGPT Work, Codex, and the API
On September 22, 2026, Plus, Pro, Business, Enterprise, and Edu users get both models in ChatGPT Work and Codex, and both are available in the API. Free and Go users can try GPT-6 Luna in the desktop app.
OpenAI says GPT-6 Sol and Luna build on Astra’s alignment advances
OpenAI says both models show improvements over their GPT-5.6 counterparts.
OpenAI introduces GPT-6 Sol and GPT-6 Luna at API prices 50% below GPT-5.6 promotional rates
OpenAI says GPT-6 Sol and GPT-6 Luna build on advances behind GPT-6 Astra as faster, more affordable models for work at scale. More efficient caching and inference are reflected in API prices 50% lower than GPT-5.6 promotional pricing.
Product Hunt names GPT-6 Astra Challenge top 5 winners
Product Hunt said five teams reached the top of its GPT-6 Astra Challenge with OpenAI Developers, winning $10k in OpenAI API credits and 1 year of ChatGPT Pro.