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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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Dev Platform
Audio
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Agents
Coding
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Image
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Meetings
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Productivity
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Data
Marketing
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ChatGPT Operator
B
Groq
S
Devin
A
Sudowrite
S
TaglineOpenAI's browser agent. Clicks and types on websites for you.The fastest AI inference in the world. Crazy low latency.Cognition Labs' autonomous coding engineer.AI writing tool built specifically for fiction writers.
CategoryAgentsDev PlatformAgentsWriting
PricingIncluded with ChatGPT Pro $200/moFree tier + pay-as-you-go API$500/mo$19-$59/mo
Best forPower users willing to pay $200/mo for a browser bot.Developers who need sub-100ms LLM responses.Engineering teams offloading tickets. Ops/platform work.Novelists, screenwriters, fiction short-form writers.
Strengths
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Brainstorm, expand, rewrite modes designed for fiction
  • Story Bible for character + plot tracking
  • Understands voice + tone better than generic chatbots
Weaknesses
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Pricey for casual use
  • Fiction-only focus — not for business writing
Kai's verdictB-tier. Still early. Manus is more flexible for less money.S-tier for speed. When latency is the product, start here.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.
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