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Leonardo.ai
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TaglineRun any open-source AI model with an API call.Spreadsheets with AI + live integrations baked in.Gamer + creator image gen with model fine-tuning built in.Open-source VS Code agent. Reads + writes + runs.
CategoryDev PlatformDataImageCoding
PricingPay per second of computeFree + $19-$89/user/moFree + $12-$60/moFree (open source) + your API costs
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Ops teams, marketers, anyone building dashboards from multiple sources.Indie game devs, illustrators, anyone training custom style models.VS Code users who want agentic coding without changing IDEs.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • General output behind Midjourney
  • Can be overwhelming
  • Can burn tokens fast if not watched
  • Less polished than Cursor
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier for creators training custom looks. B-tier for general use.A-tier. Best free agentic option in VS Code. Use with Claude for best results.
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