Man this was rushed, typo in the first section:

> Unlike the previous GPT-5.1 model, GPT-5.2 has new features for managing what the model "knows" and "remembers to improve accuracy.

Also, did they mention these features? I was looking out for it but got to the end and missed it.

(No, I just looked again and the new features listed are around verbosity, thinking level and the tool stuff rather than memory or knowledge.)