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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
Pika
A
Fathom
S
Perplexity
S
TaglineRun any open-source AI model with an API call.The playful, accessible AI video tool.Meeting notes, free forever for individuals.AI search done right. Cited answers, not chat theater.
CategoryDev PlatformVideoMeetingsResearch
PricingPay per second of computeFree + $8-$58/moFree for individuals + $15-$29/user/mo teamsFree + $20/mo Pro
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Social media creators, beginners, anyone wanting quick fun clips.Solo operators, freelancers, small teams on a budget.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • 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
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Lower fidelity than Runway/Kling
  • Still rough on complex scenes
  • Bot-joining model
  • Team features gated
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier for social/casual. B-tier for serious work. Good entry point.S-tier for solo + free. The best free option, hands down.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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