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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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Flux (Black Forest Labs)
A
v0
S
GitHub Copilot
B
Rows
A
TaglineOpen weights + strong photorealism. The open-source answer.Vercel's AI-powered UI generator. Prompt to shadcn component.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Spreadsheets with AI + live integrations baked in.
Categoryimagedesigncodingdata
PricingAPI + open weights (Schnell is Apache 2.0)Free + $20/moFree (limited) + $10/mo Pro + $19/mo BusinessFree + $19-$89/user/mo
Best forDevelopers + power users who want control and privacy.Frontend devs, PMs prototyping UIs, anyone on Next.js.Teams with GitHub already. Devs who don't want to change IDEs.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • 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
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Harder to use than hosted tools
  • Needs infra
  • Best for shadcn stack
  • Iterating can be fiddly
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictA-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.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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