Compare AI tools

	Perplexity S	GitHub Copilot B	Claude S	NotebookLM S
Tagline	AI search done right. Cited answers, not chat theater.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Anthropic's flagship — best reasoning + longest useful context.	Google's research notebook. Turns your docs into a podcast.
Category	research	coding	chat	research
Pricing	Free + $20/mo Pro	Free (limited) + $10/mo Pro + $19/mo Business	Free + $20/mo Pro + team/enterprise	Free
Best for	Replacing Google for any question where you want a cited answer in seconds.	Teams with GitHub already. Devs who don't want to change IDEs.	Long writing, code, careful thinking, documents over 50 pages.	Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Great enterprise story Works in your existing IDE Chat + autocomplete	Best-in-class writing + nuanced reasoning 1M context on Opus Artifacts for code/docs Lowest hallucination rate in my testing	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Less agentic than Cursor/Claude Code Model quality varies	Image generation is weak No native web search on all tiers	Google-only Can be slow on large corpora
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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