Compare AI tools

	NotebookLM S	GitHub Copilot B	Gamma A	OpenRouter S
Tagline	Google's research notebook. Turns your docs into a podcast.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	AI slide decks that don't look AI-generated.	One API, every model. Pay-as-you-go, no subscriptions.
Category	research	coding	productivity	dev platform
Pricing	Free	Free (limited) + $10/mo Pro + $19/mo Business	Free + $10-$20/mo	Pay per token — model-dependent
Best for	Students, researchers, anyone with a stack of PDFs or a topic to learn.	Teams with GitHub already. Devs who don't want to change IDEs.	Pitch decks, proposals, internal presentations — fast.	Developers experimenting across models. Apps that want fallback logic.
Strengths	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying	Great enterprise story Works in your existing IDE Chat + autocomplete	Strong templates Decks, docs, webpages Doesn't look generic	300+ models from one endpoint Automatic fallbacks between providers No subscription — just pay what you use
Weaknesses	Google-only Can be slow on large corpora	Less agentic than Cursor/Claude Code Model quality varies	Locked into Gamma's format Export quality varies	Slight markup over direct API Some provider features not exposed
Kai's verdict	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.	S-tier for model-shopping. I use this for every prototype before committing.
Link	Open →	Open →	Open →	Open →