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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
Cline
A
GitHub Copilot
B
Leonardo.ai
A
TaglineRun any open-source AI model with an API call.Open-source VS Code agent. Reads + writes + runs.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Gamer + creator image gen with model fine-tuning built in.
Categorydev platformcodingcodingimage
PricingPay per second of computeFree (open source) + your API costsFree (limited) + $10/mo Pro + $19/mo BusinessFree + $12-$60/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).VS Code users who want agentic coding without changing IDEs.Teams with GitHub already. Devs who don't want to change IDEs.Indie game devs, illustrators, anyone training custom style models.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • General output behind Midjourney
  • Can be overwhelming
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Best free agentic option in VS Code. Use with Claude for best results.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for creators training custom looks. B-tier for general use.
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