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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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Lex
A
Groq
S
Perplexity
S
Manus
S
TaglineGoogle Docs with an AI collaborator baked in.The fastest AI inference in the world. Crazy low latency.AI search done right. Cited answers, not chat theater.Autonomous AI agent that actually finishes tasks.
CategoryWritingDev PlatformResearchAgents
PricingFree + $12/moFree tier + pay-as-you-go APIFree + $20/mo ProFree tier + $39-$199/mo
Best forEssays, long-form drafts, thinking on the page.Developers who need sub-100ms LLM responses.Replacing Google for any question where you want a cited answer in seconds.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for speed. When latency is the product, start here.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier in the agent category. The first one I'd give to a non-technical friend.
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