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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Dev Platform
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Perplexity
S
Groq
S
Claude Agent SDK
S
Fathom
S
TaglineAI search done right. Cited answers, not chat theater.The fastest AI inference in the world. Crazy low latency.Anthropic's SDK for building your own agents on Claude.Meeting notes, free forever for individuals.
CategoryResearchDev PlatformAgentsMeetings
PricingFree + $20/mo ProFree tier + pay-as-you-go APIAPI usage + SDK is freeFree for individuals + $15-$29/user/mo teams
Best forReplacing Google for any question where you want a cited answer in seconds.Developers who need sub-100ms LLM responses.Developers building custom agents for their own company/product.Solo operators, freelancers, small teams on a budget.
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
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Developer-only
  • You build the UI
  • Bot-joining model
  • Team features gated
Kai's verdictS-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.S-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for solo + free. The best free option, hands down.
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