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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
Gamma
A
TaglineOpen weights + strong photorealism. The open-source answer.AI slide decks that don't look AI-generated.
CategoryImageProductivity
PricingAPI + open weights (Schnell is Apache 2.0)Free + $10-$20/mo
Best forDevelopers + power users who want control and privacy.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Harder to use than hosted tools
  • Needs infra
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictA-tier. S-tier if you self-host. The reason open-source image gen matters.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
LinkOpen →Open →