Compare AI tools

	Replicate S	Perplexity S	Grok A	Gemini A
Tagline	Run any open-source AI model with an API call.	AI search done right. Cited answers, not chat theater.	xAI's chatbot. Real-time X/Twitter data + fewer refusals.	Google's answer. Best integrated with Workspace + free for a lot.
Category	Dev Platform	Research	Chatbots	Chatbots
Pricing	Pay per second of compute	Free + $20/mo Pro	Free + $30/mo SuperGrok + included with X Premium	Free + $20/mo Advanced (bundled with 2TB Drive)
Best for	Developers using open-source models (Flux, SDXL, Whisper, etc).	Replacing Google for any question where you want a cited answer in seconds.	Breaking news, live event tracking, users already on X.	Anyone already on Google, research tasks, summarizing long documents.
Strengths	Tens of thousands of models (image, video, audio, LLMs) One-line API for any model Cog framework for custom model deploy	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Live access to X posts for real-time events Less restrictive on edgy questions Fast inference on Grok-3 and up	Native Google Workspace integration Very long context (1M+) Deep Research feature Free tier is generous
Weaknesses	Cold starts on less-popular models Pricing gets real at scale	Not a general chatbot Answers can be shallow on complex topics	Writing quality trails Claude/ChatGPT Political bias debates Ecosystem is just X	Writing quality trails Claude Over-refusals on edge content UI is cluttered
Kai's verdict	S-tier for open-source model APIs. The default in this space.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	A-tier for real-time. B-tier for everything else. Worth checking when news breaks.	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 →