Research-based guide
NotebookLM / Gemini Notebook
Source-based research assistant with cited chat, briefings and AI Audio Overviews; current Google documentation uses Gemini Notebook.
AI research
Research assistants for web discovery and document collections. Compare source coverage, citations, privacy and the work needed to verify an answer.
2 matching tools
Research-based guide
Perplexity
Search and research assistant with cited reports and persistent Projects for ongoing work.
News, guides & comparisons
AI news
ChatGPT adds multi-page PDF scanning on iOS
ChatGPT’s October 1 iOS rollout combines camera scans into one PDF. A useful capture step for briefs and notes, with source checks still needed.
AI news
DeepSeek refreshes Flash and opens separately billed web tools
DeepSeek’s October 17 update refreshes V4.1 Flash and opens Search and Fetch APIs. Budget model tokens separately from web requests.