> There's also really clear bias given that the main results only feature Google models.

The main results also don’t seem to know what a “model” is, as the two “models” it refers to are “stock Gemini 2.5 Pro” and “a retrieval-augmented version of NotebookLM”.

One of which is a model, and the other of which is an interface backed by different models depending on exactly when the analysis was performed.