Compare AI tools

	ChatGPT Operator B	Lex A	Perplexity S	Devin A
Tagline	OpenAI's browser agent. Clicks and types on websites for you.	Google Docs with an AI collaborator baked in.	AI search done right. Cited answers, not chat theater.	Cognition Labs' autonomous coding engineer.
Category	agents	writing	research	agents
Pricing	Included with ChatGPT Pro $200/mo	Free + $12/mo	Free + $20/mo Pro	$500/mo
Best for	Power users willing to pay $200/mo for a browser bot.	Essays, long-form drafts, thinking on the page.	Replacing Google for any question where you want a cited answer in seconds.	Engineering teams offloading tickets. Ops/platform work.
Strengths	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate	Less feature-rich than Google Docs AI ceiling below dedicated tools	Not a general chatbot Answers can be shallow on complex topics	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	B-tier. Still early. Manus is more flexible for less money.	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
Link	Open →	Open →	Open →	Open →