Compare AI tools

	Devin A	NotebookLM S	Cursor S	ChatGPT Operator B
Tagline	Cognition Labs' autonomous coding engineer.	Google's research notebook. Turns your docs into a podcast.	VS Code fork that made AI coding actually work.	OpenAI's browser agent. Clicks and types on websites for you.
Category	agents	research	coding	agents
Pricing	$500/mo	Free	Free + $20/mo Pro + $40/mo Business	Included with ChatGPT Pro $200/mo
Best for	Engineering teams offloading tickets. Ops/platform work.	Students, researchers, anyone with a stack of PDFs or a topic to learn.	Developers. Non-developers who want to ship working code.	Power users willing to pay $200/mo for a browser bot.
Strengths	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying	Tab completion feels like mind-reading Composer for multi-file edits Runs Claude, GPT, Gemini — you pick	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks
Weaknesses	Expensive Best for well-scoped tasks Not for solo hobbyists	Google-only Can be slow on large corpora	Can feel overwhelming for non-coders Expensive at scale	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate
Kai's verdict	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.	S-tier for coding. If you write code of any kind, this pays back the $20 in a day.	B-tier. Still early. Manus is more flexible for less money.
Link	Open →	Open →	Open →	Open →