It says this “All of this is possible without allowing Astra to write training loops. It uses its reasoning to figure out what each part of a neural network computes, or should compute, and changes the weights accordingly.”

This seems 100% accurate to me. What is a lie here?

Nobody said they outright “lied”, most misleading statements are “100% accurate” yet are designed to mislead the reader.

And when you see the reactions in the HN comment to the original article, it's pretty clear that most people have indeed been mislead.