It may be in a mode you didn't open, on a plan you don't have, or kept for partners. Here's the check.
OpenAI has announced GPT-6 Astra. Say you read the headline, opened ChatGPT and went looking for it. On one Plus account we checked on 25 September, the model menu in Chat mode offered GPT-5.6 Sol and GPT-5.5, two clicks in. Astra wasn't on the list. It was there, named on the menu once we switched to Work mode, and OpenAI's help page says as much: "Plus plans include GPT‑6 Astra in ChatGPT Work and Codex."
That is the small version of a wider gap. The model in the headline can be somewhere in your app you didn't look, or not on your plan at all, and the headline won't say which.
Launches reach customers in levels
Each lab says who gets the model further down its own page. OpenAI says Astra "will become available to all ChatGPT Plus, Pro, Business, and Enterprise users", and Free isn't listed. Google says Gemini 3.8 Flash "is available to Google AI Pro and Ultra subscribers" in the Gemini app. xAI says Grok 4.7 "is available today in Cursor and Grok Build" and through its API, and on one account we checked, every mode in the Grok app pointed to Grok 4.6.
Each also keeps something for a smaller group: GPT‑6 Pro, powered by Astra, for OpenAI's Pro, Business and Enterprise plans, a Cyber version of 3.8 Flash for Google's "trusted defenders", and "invite-only access" to Grok 4.7's red-team capabilities for select xAI partners.
Find it on your plan, in every mode
So before you repeat a model headline, act on it or pay for it, ask one question: can I use it? There are three answers: yours, yours at a price, or not yours.
To find out, open your app and look for the model on your plan, in every mode the app has. If the menu shows modes such as "Fast" or "Expert", hover over each one, because some apps name the model only there. If it still isn't there, search the model's name plus "available" and read that sentence on the lab's newest page, which may be a help page rather than the launch post.
One Anthropic model family shows all three answers. Anthropic says Claude Fable 5.1 and Claude Mythos 5.1 "are the same model, but with different levels of safeguards". Its help pages say that, as of September 2026, Fable 5.1 is "included as a standard part of your plan" on Max, where you can spend "up to 50% of your weekly usage limits" on it at no extra cost: yours. On Pro, it runs "on pay-as-you-go usage credits": yours at a price. Mythos 5.1, which Anthropic says has "the strongest cyber capabilities of any model we’ve released", is "available only through our trusted access programs": not yours, unless you are in one.
The page says what you should get
In 2023 the researcher Irene Solaiman described model releases as a gradient from fully closed to fully open. We'd add that plans make a smaller gradient inside the apps we use. Launch posts also go stale: Anthropic's June post said Fable 5 would be included on Pro through 22 June, and its help pages now carry the current terms. So read the lab's newest page to find out what your plan should get, then check your app to see what has actually reached you.
A model in the headline isn't yours until you find it on your plan, at your price.
Even once you find it, the model's name is only half of what you get, and I wrote about the other half in Same Model, Different Product.
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