Compare AI tools

	NotebookLM S	Genspark A	Claude Code S	Gemini A
Tagline	Google's research notebook. Turns your docs into a podcast.	AI agent for deep search. Generates Sparkpages — full mini-reports.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	Google's answer. Best integrated with Workspace + free for a lot.
Category	Research	Research	Coding	Chatbots
Pricing	Free	Free + $25/mo Plus	Part of Claude Pro/Max/Team plans	Free + $20/mo Advanced (bundled with 2TB Drive)
Best for	Students, researchers, anyone with a stack of PDFs or a topic to learn.	Travel planning, shopping comparisons, deep research where you want an artifact back.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Anyone already on Google, research tasks, summarizing long documents.
Strengths	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying	Sparkpages = curated multi-source mini-articles Agent can book, compare, shop Autopilot agent for long tasks	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Native Google Workspace integration Very long context (1M+) Deep Research feature Free tier is generous
Weaknesses	Google-only Can be slow on large corpora	Early-stage — rough edges Less reliable than Perplexity for simple questions	Terminal-based — learning curve Can't be used without Claude subscription	Writing quality trails Claude Over-refusals on edge content UI is cluttered
Kai's verdict	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.	A-tier. Bet on this one — the Sparkpage format is genuinely new.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
Link	Open →	Open →	Open →	Open →