Compare AI tools

	Perplexity S	Replicate S	Windsurf A	ChatGPT Operator B
Tagline	AI search done right. Cited answers, not chat theater.	Run any open-source AI model with an API call.	Codeium's agentic IDE. Cascade agent + strong free tier.	OpenAI's browser agent. Clicks and types on websites for you.
Category	research	dev platform	coding	agents
Pricing	Free + $20/mo Pro	Pay per second of compute	Free + $15/mo Pro	Included with ChatGPT Pro $200/mo
Best for	Replacing Google for any question where you want a cited answer in seconds.	Developers using open-source models (Flux, SDXL, Whisper, etc).	Developers who want Cursor-like power for less money.	Power users willing to pay $200/mo for a browser bot.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Tens of thousands of models (image, video, audio, LLMs) One-line API for any model Cog framework for custom model deploy	Cheaper than Cursor Cascade agent for multi-file tasks Solid free tier	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Cold starts on less-popular models Pricing gets real at scale	Smaller community Model selection more limited	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for open-source model APIs. The default in this space.	A-tier. Close second to Cursor. If $5/mo matters, start here.	B-tier. Still early. Manus is more flexible for less money.
Link	Open →	Open →	Open →	Open →