TL;DR
On October 8, 2026, OpenAI made GPT-6 available to all ChatGPT users globally (free and paid) and launched 'Intelligent UI'. This FAQ answers common questions in three groups: basics, usage, and safety/versions.
Basics
1. What is GPT-6?
GPT-6 is OpenAI's flagship model, released as GPT-6 Sol and GPT-6 Luna on September 22, 2026, and rolled out to all ChatGPT users on October 8, 2026. Per Zhidongxi, ChatGPT, used by over 1.2 billion people globally, received the major upgrade that day (per Zhidongxi and OpenAI's official System Card).
2. How is GPT-6 different from the previous model in ChatGPT?
GPT-6 replaces GPT-5.6 Sol and GPT-5.6 Luna in ChatGPT; Codex and ChatGPT Work still use the previously released versions. That is what the official System Card states for the October release (per OpenAI's official System Card, via ai0.news).
3. Who can use GPT-6?
All ChatGPT users globally, across free and paid plans. The rollout began with Plus, Pro, Business and Enterprise users and then extended to Free and Go users (per Zhidongxi and The Stack).
Usage
4. What is 'Intelligent UI'?
Intelligent UI renders responses as interactive layouts such as checklists, cards, editable charts and custom calculators instead of plain text. It launched globally with GPT-6 for ChatGPT users (per The Stack and Tech Bytes).
5. Do I have to pay to use GPT-6?
No extra payment is required: GPT-6 is available across free and paid plans. Paid tiers (Plus, Pro, Business, Enterprise) received it first, and Free and Go users received it the same day (per Zhidongxi and The Stack).
6. Can I use the new GPT-6 in Codex or ChatGPT Work?
Codex and ChatGPT Work still use the previously released GPT-6 version, not the October rollout. The official System Card makes this distinction (per OpenAI's official System Card).
Safety & Versions
7. What are the safety evaluation results for GPT-6?
OpenAI's official System Card acknowledges statistically significant regressions on self-harm and extremism evaluations versus GPT-5.6. This comes from the System Card published by OpenAI (per ai0.news citing the official document).
8. What is the difference between the September release and the October rollout?
September was the model launch (GPT-6 Sol/Luna); October is the full rollout to all users with the new Intelligent UI capability. Within ChatGPT it is the same model; Codex and ChatGPT Work use the September version (per OpenAI's official System Card and this site's earlier coverage).
Sources
- ai0.news (October 8, 2026): GPT-6 arrives with Intelligent UI (citing OpenAI's System Card)
- Zhidongxi (October 8, 2026): GPT-6 fully opens, AI turns answers into apps
- The Stack (October 8, 2026): OpenAI ships a new interface paradigm and a new flagship model