Compare AI tools

	Perplexity S	Groq S	Kling A	Sora A
Tagline	AI search done right. Cited answers, not chat theater.	The fastest AI inference in the world. Crazy low latency.	Kuaishou's video model. The surprise standout.	OpenAI's video model. Long clips, cinematic quality.
Category	Research	Dev Platform	Video	Video
Pricing	Free + $20/mo Pro	Free tier + pay-as-you-go API	Credit-based, free trial	Included with ChatGPT Plus/Pro
Best for	Replacing Google for any question where you want a cited answer in seconds.	Developers who need sub-100ms LLM responses.	Anyone who wants top-tier video quality for less.	ChatGPT subscribers experimenting with cinematic shots.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	500+ tokens/sec on Llama/Mixtral — feels instant Custom LPU hardware Great free tier	Very strong motion + physics Often beats Runway on realism Great price	Up to 20-sec clips at 1080p Strong physics + scene composition Storyboard feature for longer narratives Remix existing videos
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Open-weight models only (no Claude/GPT) Less flexibility on custom configs	UX is rough for English speakers Queue times	Stricter content policy than competitors Hit-or-miss on complex motion Text-in-video still struggles
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 speed. When latency is the product, start here.	A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.	A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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