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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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Replicate
S
Perplexity
S
Pika
A
Fathom
S
TaglineRun any open-source AI model with an API call.AI search done right. Cited answers, not chat theater.The playful, accessible AI video tool.Meeting notes, free forever for individuals.
CategoryDev PlatformResearchVideoMeetings
PricingPay per second of computeFree + $20/mo ProFree + $8-$58/moFree for individuals + $15-$29/user/mo teams
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Replacing Google for any question where you want a cited answer in seconds.Social media creators, beginners, anyone wanting quick fun clips.Solo operators, freelancers, small teams on a budget.
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
  • Ingredients feature — combine people, objects, scenes
  • Lip sync + sound effects
  • Fun, approachable UX
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Lower fidelity than Runway/Kling
  • Still rough on complex scenes
  • Bot-joining model
  • Team features gated
Kai's verdictS-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 social/casual. B-tier for serious work. Good entry point.S-tier for solo + free. The best free option, hands down.
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