Compare AI tools

	Claude Agent SDK S	Perplexity S	Groq S	Devin A
Tagline	Anthropic's SDK for building your own agents on Claude.	AI search done right. Cited answers, not chat theater.	The fastest AI inference in the world. Crazy low latency.	Cognition Labs' autonomous coding engineer.
Category	Agents	Research	Dev Platform	Agents
Pricing	API usage + SDK is free	Free + $20/mo Pro	Free tier + pay-as-you-go API	$500/mo
Best for	Developers building custom agents for their own company/product.	Replacing Google for any question where you want a cited answer in seconds.	Developers who need sub-100ms LLM responses.	Engineering teams offloading tickets. Ops/platform work.
Strengths	Production-grade agent primitives Built on Claude (best reasoning) Full control — build exactly what you need	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	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Developer-only You build the UI	Not a general chatbot Answers can be shallow on complex topics	Open-weight models only (no Claude/GPT) Less flexibility on custom configs	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	S-tier for builders. The right primitives. What Kai is built on under the hood.	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 for the right use case. Not for solo devs. If you manage engineers, try one license.
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