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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
Hugging Face
S
Devin
A
TaglineOpen weights + strong photorealism. The open-source answer.The GitHub of AI. Models, datasets, spaces — all in one.Cognition Labs' autonomous coding engineer.
CategoryImageDev PlatformAgents
PricingAPI + open weights (Schnell is Apache 2.0)Free + $9-$20/mo + enterprise$500/mo
Best forDevelopers + power users who want control and privacy.Any ML/AI developer. Hobbyists exploring open models.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • Largest open-source AI model hub
  • Hosted inference via Spaces + Inference Endpoints
  • Great community
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Harder to use than hosted tools
  • Needs infra
  • Overwhelming for beginners
  • Hosted inference pricing varies
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictA-tier. S-tier if you self-host. The reason open-source image gen matters.S-tier infrastructure. The one platform every AI dev eventually uses.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
LinkOpen →Open →Open →