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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.Vector + raster AI for designers. Actually controls the output.Run any open-source AI model with an API call.AI-powered networked notes. Roam with a brain.
CategoryCodingImageDev PlatformProductivity
PricingFree (open source) + your API costsFree + $12-$48/moPay per second of compute$10/mo
Best forVS Code users who want agentic coding without changing IDEs.Designers, brand teams, anyone needing vector output or tight style control.Developers using open-source models (Flux, SDXL, Whisper, etc).Knowledge workers + thinkers who want AI in their second brain.
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • 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
  • AI auto-links related notes
  • Generates backlinks + summaries
  • Clean, minimal UX
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Expensive for just notes
  • Smaller community than Obsidian
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier for designers. The only one that takes vectors seriously.S-tier for open-source model APIs. The default in this space.A-tier. Niche but beloved. If you've outgrown Notion, try this.
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