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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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Leonardo.ai
A
Cursor
S
Flux (Black Forest Labs)
A
v0
S
TaglineGamer + creator image gen with model fine-tuning built in.VS Code fork that made AI coding actually work.Open weights + strong photorealism. The open-source answer.Vercel's AI-powered UI generator. Prompt to shadcn component.
CategoryImageCodingImageDesign
PricingFree + $12-$60/moFree + $20/mo Pro + $40/mo BusinessAPI + open weights (Schnell is Apache 2.0)Free + $20/mo
Best forIndie game devs, illustrators, anyone training custom style models.Developers. Non-developers who want to ship working code.Developers + power users who want control and privacy.Frontend devs, PMs prototyping UIs, anyone on Next.js.
Strengths
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
Weaknesses
  • General output behind Midjourney
  • Can be overwhelming
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Harder to use than hosted tools
  • Needs infra
  • Best for shadcn stack
  • Iterating can be fiddly
Kai's verdictA-tier for creators training custom looks. B-tier for general use.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. S-tier if you self-host. The reason open-source image gen matters.S-tier. If you're on Vercel/shadcn, this is cheating.
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