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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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TaglineOpen-source VS Code agent. Reads + writes + runs.Design + publish sites with AI assists built in.Vector + raster AI for designers. Actually controls the output.Run any open-source AI model with an API call.
CategoryCodingDesignImageDev Platform
PricingFree (open source) + your API costsFree + $5-$30/moFree + $12-$48/moPay per second of compute
Best forVS Code users who want agentic coding without changing IDEs.Designers shipping marketing sites without engineers.Designers, brand teams, anyone needing vector output or tight style control.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • AI generates sections + copy + layouts
  • Designer-first publishing (not just templates)
  • Great animations
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Less flexible than raw code
  • Pricing per-site adds up
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.A-tier for designer-led sites. S-tier if animations matter.S-tier for designers. The only one that takes vectors seriously.S-tier for open-source model APIs. The default in this space.
LinkOpen →Open →Open →Open →