ChatGPT is moving every user to GPT-6

ChatGPT now has two GPT-6 models. Plus, Pro, Business and Enterprise users get GPT-6 Sol, and Free and Go users get GPT-6 Luna, which Engadget describes as less capable than Sol. Your customers who use ChatGPT without paying and your customers who pay are being answered by different models.

The rollout is gradual. OpenAI calls it global but gives no date for any one account, and Notebookcheck quotes its advice that if you don't see GPT-6 in the model menu, it may not be available for your account yet.

The main new feature is Intelligent UI. Notebookcheck describes answers that can include diagrams, buttons and small calculators, so a reply can be something you click on as well as something you read.

OpenAI's safety report says both new models make significantly fewer factual errors than the August versions of GPT-5.6 Sol and GPT-5.6 Luna on nearly all of its measures. The exception is the share of individual claims containing an error on its factuality-heavy prompts. OpenAI picked those prompts to be difficult and says the results do not reflect how often errors happen in everyday use.

The report has nothing on brands or businesses. Whether GPT-6 describes yours correctly, with the right prices, locations and services, is something you can only find out by asking it.

Discoverable's UK AI Shortlist Study put 1,000 buying questions to six consumer AI services, ChatGPT among them, on 6 and 7 September, a month before GPT-6 arrived. ChatGPT did not name the business ranked first on Google in 72.5% of eligible answers (1,183 of 1,632).

The study could not see which model version answered most of its questions, so it is a reading of ChatGPT as customers met it in early September. It is the before picture for the UK. Whether GPT-6 names Google's leaders more or less often stays an open question until the same kind of questions are asked again.

Mark 7 October in whatever you use to track ChatGPT, and 8 October if you check without a paid plan. If ChatGPT starts or stops naming you around those dates, the model may be the cause rather than anything you or a competitor published, so wait for a second reading before you credit or blame a page.

Ask your customers' buying questions again now, signed in without a paid plan and with one if you can. Note which businesses each answer names, what it says about yours and which websites it cites. Check the facts it gives about you, and record what the answer shows as well as what it says, because GPT-6 can reply with a diagram or a small calculator where it used to write a paragraph.

For a quick reading, check if your business is on ChatGPT: the free checker puts 3 buying questions about your category to ChatGPT in a logged-out session and shows whether each answer named you and which pages it cited. To follow your trend across the switch, a plan checks your 10 tracked prompts weekly on every surface, ChatGPT included. Our ChatGPT visibility tracker page explains how ChatGPT chooses the sources it reads.