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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
Replicate
S
Perplexity
S
Devin
A
TaglineOpen weights + strong photorealism. The open-source answer.Run any open-source AI model with an API call.AI search done right. Cited answers, not chat theater.Cognition Labs' autonomous coding engineer.
CategoryImageDev PlatformResearchAgents
PricingAPI + open weights (Schnell is Apache 2.0)Pay per second of computeFree + $20/mo Pro$500/mo
Best forDevelopers + power users who want control and privacy.Developers using open-source models (Flux, SDXL, Whisper, etc).Replacing Google for any question where you want a cited answer in seconds.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • 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
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • 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 for open-source model APIs. The default in this space.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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