OpenAI Upgrades ChatGPT: GPT-5.6 Sol for Plus/Pro, Unlimited Luna for Free Users

OpenAI · x · 2026-08-07

OpenAI announced a major upgrade to ChatGPT's underlying models. For Plus and Pro users, both Instant and deep reasoning are now powered by GPT-5.6 Sol, designed to deliver more factual and focused responses.

Additionally, Free and Go users will get unlimited text chats with GPT-5.6 Luna starting tomorrow.

Related event: OpenAI Upgrades ChatGPT: Unified Model Experience and Unlimited Chat for Free Users(13 posts)→

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