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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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S
Aider
A
Lovable
A
Kling
A
TaglineRun any open-source AI model with an API call.Terminal-based AI pair programmer. Git-aware, model-flexible.Build a full app from a prompt. Stripe-ready.Kuaishou's video model. The surprise standout.
CategoryDev PlatformCodingDesignVideo
PricingPay per second of computeFree (open source) + whatever API you useFree + $25-$100/moCredit-based, free trial
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers who want open-source tooling with full control.Non-devs + solopreneurs shipping MVPs.Anyone who wants top-tier video quality for less.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Complexity ceiling
  • Can generate brittle code
  • UX is rough for English speakers
  • Queue times
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.
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