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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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DeepSeek
S
Replicate
S
Devin
A
Lovable
A
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.Run any open-source AI model with an API call.Cognition Labs' autonomous coding engineer.Build a full app from a prompt. Stripe-ready.
Categorychatdev platformagentsdesign
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Pay per second of compute$500/moFree + $25-$100/mo
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Developers using open-source models (Flux, SDXL, Whisper, etc).Engineering teams offloading tickets. Ops/platform work.Non-devs + solopreneurs shipping MVPs.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Complexity ceiling
  • Can generate brittle code
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for open-source model APIs. The default in this space.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.
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