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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
Leonardo.ai
A
Gemini
A
TaglineRun any open-source AI model with an API call.Open-source VS Code agent. Reads + writes + runs.Gamer + creator image gen with model fine-tuning built in.Google's answer. Best integrated with Workspace + free for a lot.
CategoryDev PlatformCodingImageChatbots
PricingPay per second of computeFree (open source) + your API costsFree + $12-$60/moFree + $20/mo Advanced (bundled with 2TB Drive)
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).VS Code users who want agentic coding without changing IDEs.Indie game devs, illustrators, anyone training custom style models.Anyone already on Google, research tasks, summarizing long documents.
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
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • General output behind Midjourney
  • Can be overwhelming
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
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.A-tier for creators training custom looks. B-tier for general use.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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