The ability to precisely find information in long documents, answer questions accurately and show reference from the source on the side.
Among the summarizer AI tools I tested, Notebooklm, is leaps ahead compared to all other tools. The tool uses Gemini 2.0. Long documents are processed in seconds and it's able to find the information I need in the document in a few seconds. It shows and highlights the information from the original document on the side of the chat box as well.
With Kagi Assistant, I get the best result from Sonnet 3.5. See attached pictures for the differences between the two tools. 
The improved features will help users find and process information faster. Having reference document highlighted on the side also helps users see context of the information instead of having to open the original document in a different app and look for the paragraph the Assistant refers to manually.
