OpenAI says GPT-6 in ChatGPT's Chat tab is powered by GPT-6 Sol for Plus, Pro, Business, and Enterprise tiers and GPT-6 Luna for Free and Go tiers (@openai)

OpenAI is rolling out GPT-6 in ChatGPT with tier-specific model routing, giving paid business users access to GPT-6 Sol while Free and Go users get GPT-6 Luna, alongside a global launch of the new Intelligent UI. For CIOs and IT leaders, this signals a faster pace of AI feature adoption but also more complexity in standardization, governance, user experience consistency, and licensing decisions across workforce segments. Enterprises should expect productivity gains, but they will need to manage model behavior differences, access controls, and change management as ChatGPT becomes a more differentiated enterprise service.