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Leonardo.ai
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TaglineRun any open-source AI model with an API call.Gamer + creator image gen with model fine-tuning built in.Spreadsheets with AI + live integrations baked in.Open-source VS Code agent. Reads + writes + runs.
CategoryDev PlatformImageDataCoding
PricingPay per second of computeFree + $12-$60/moFree + $19-$89/user/moFree (open source) + your API costs
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Indie game devs, illustrators, anyone training custom style models.Ops teams, marketers, anyone building dashboards from multiple sources.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
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • 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
  • General output behind Midjourney
  • Can be overwhelming
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • 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 for creators training custom looks. B-tier for general use.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. Best free agentic option in VS Code. Use with Claude for best results.
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