OpenAI Upgrades ChatGPT: Paid Users Get GPT-5.6 Sol, Free Users Enjoy Unlimited Luna
OpenAI has comprehensively upgraded ChatGPT's underlying models and user experience, rolling out differentiated updates across user tiers. Daily conversations for Plus and Pro users are now powered by the updated GPT-5.6 Sol to improve factual accuracy and response focus, while free users are welcomed with the brand-new GPT-5.6 Luna model and unlimited chat capabilities.
Confirmed
- Model Updates: Plus and Pro users in the daily Chat experience now have access to the updated GPT-5.6 Sol model. The GPT-5.6 Sol version driving Work and Codex remains unchanged.
- Free Tier Upgrade: Free and Go users will default to the GPT-5.6 Luna model this week, alongside a newly added "Think" button for tackling complex problems.
- New Interaction Controls: Plus and Pro users get exclusive access to a new reasoning intensity slider (or reasoning depth slider), allowing flexible adjustment between instant replies and deep thinking.
- Capacity Boost: Free and Go users will soon enjoy unlimited conversation experiences (some sources indicate this will take effect tomorrow or next week).
Why It Matters
- This update signifies OpenAI's clearer demarcation between paid and free users. Paid users gain more precise and controllable deep reasoning experiences via GPT-5.6 Sol and the reasoning slider. Meanwhile, free users acquire the ability to handle complex problems through the Luna model and the Think button, while breaking previous usage limits, significantly lowering the barrier to entry.
2026-08-07 ~ 2026-08-07 · 13 related posts
Primary sources
- ChatGPT Free Gets GPT-5.6 Luna, Paid Tiers Get Thinking Slider — testingcatalog · 2026-08-07
- GPT-5.6 Instant Rolling Out in ChatGPT, Replacing 5.5 Instant — cristianperlado · 2026-08-07
- [source] OpenAI Upgrades ChatGPT: GPT-5.6 Sol for Plus/Pro, Unlimited Luna for Free Users — OpenAI · 2026-08-07
- ChatGPT Introduces Reasoning Effort Slider for Plus and Pro Users — OpenAI · 2026-08-07
- [source] OpenAI Updates GPT-5.6 Sol, Adds Think Button for Free Users — OpenAI · 2026-08-07
- OpenAI Announces Unlimited Text Chat with GPT-5.6 Luna — Elektro121 · 2026-08-07
- OpenAI Updates ChatGPT: Reasoning Slider for Plus, Unlimited Chat for Free Users Next Week — mark_k · 2026-08-07
- OpenAI Rolls Out 5.6 Model Updates: Unifying Instant Speed with Maximum Intelligence — michpokrass · 2026-08-07
- OpenAI Ships 5.6 Sol and Luna Models, Unlocks Unlimited Chats for Free Users — michpokrass · 2026-08-07
- OpenAI Unifies ChatGPT Models: Slider Switches Between Speed and Intelligence — willdepue · 2026-08-07
- [source] OpenAI Unifies Capabilities: Updated Sol Model Merges Quick Chats and Deep Reasoning — morqon · 2026-08-07
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