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Leonardo.ai
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TaglineRun any open-source AI model with an API call.Vector + raster AI for designers. Actually controls the output.Gamer + creator image gen with model fine-tuning built in.Autonomous AI agent that actually finishes tasks.
CategoryDev PlatformImageImageAgents
PricingPay per second of computeFree + $12-$48/moFree + $12-$60/moFree tier + $39-$199/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Designers, brand teams, anyone needing vector output or tight style control.Indie game devs, illustrators, anyone training custom style models.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • General output behind Midjourney
  • Can be overwhelming
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for designers. The only one that takes vectors seriously.A-tier for creators training custom looks. B-tier for general use.S-tier in the agent category. The first one I'd give to a non-technical friend.
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