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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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Replicate
S
Le Chat (Mistral)
B
Perplexity
S
Lex
A
TaglineRun any open-source AI model with an API call.French alternative. Fast, European, privacy-focused.AI search done right. Cited answers, not chat theater.Google Docs with an AI collaborator baked in.
Categorydev platformchatresearchwriting
PricingPay per second of computeFree + $15/mo ProFree + $20/mo ProFree + $12/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).European users with data residency needs. Fans of open-weight models.Replacing Google for any question where you want a cited answer in seconds.Essays, long-form drafts, thinking on the page.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • European data residency
  • Very fast responses
  • Open-weight Mistral models available
  • Good French/European languages
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Smaller capability gap vs frontier models
  • Less polished UX
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictS-tier for open-source model APIs. The default in this space.B-tier overall, A-tier if GDPR/data residency matters. Solid backup option.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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