Claude Fable

Open-weight means Meta publishes the trained model itself, the weights, so anyone can download it and run it on their own hardware.

That's different from ChatGPT or Claude, where you're renting access to a model that lives on someone else's servers.

Here's the interesting bit.

Meta teamed up with Apple on this one.

That's Microsoft's claim, so treat it as that.

It builds on the MI-Thinking one model they announced in June.

Google's Gemini4 Argon was announced on the thirtieth of September, and Mollick says it's the first model outside OpenAI and Anthropic to clear the bar set by Claude Fable five, Mythos five, and OpenAI's Astra.

But it's rolling out first only to vetted cyber defenders through a program called Fairwind.

Today, one question: Where does AI actually stand as we head into the last quarter of twenty twenty-six? Start with the models because the release pace has stopped being a talking point and turned into a logistics problem.

Anthropic shipped Claude Fable five point one and Mythos five point one on September first.

Google followed a day later with Gemini three point eight Flash, its third Flash generation in six weeks.

Then OpenAI launched GPT-6 Astra at ten dollars in and fifty dollars out per million tokens, the first price increase at the frontier in years.