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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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Aider
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v0
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Ollama
S
TaglineRun any open-source AI model with an API call.Terminal-based AI pair programmer. Git-aware, model-flexible.Vercel's AI-powered UI generator. Prompt to shadcn component.Run LLMs locally. One-line install, GUI optional.
CategoryDev PlatformCodingDesignDev Platform
PricingPay per second of computeFree (open source) + whatever API you useFree + $20/moFree + open source
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers who want open-source tooling with full control.Frontend devs, PMs prototyping UIs, anyone on Next.js.Devs wanting offline/local LLMs for privacy or experimentation.
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
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • Run Llama, Mistral, Qwen, etc. on your laptop
  • Simple CLI + API
  • Hardware-aware (picks the right quant)
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Best for shadcn stack
  • Iterating can be fiddly
  • Needs beefy laptop for larger models
  • Speed way behind cloud APIs
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.S-tier. If you're on Vercel/shadcn, this is cheating.S-tier for local inference. If you care about privacy or want to tinker, install this today.
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