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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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Devin
A
ChatGPT Operator
B
HeyGen
S
Groq
S
TaglineCognition Labs' autonomous coding engineer.OpenAI's browser agent. Clicks and types on websites for you.AI avatar videos. Record once, speak any language.The fastest AI inference in the world. Crazy low latency.
CategoryAgentsAgentsVideoDev Platform
Pricing$500/moIncluded with ChatGPT Pro $200/moFree + $24-$65/moFree tier + pay-as-you-go API
Best forEngineering teams offloading tickets. Ops/platform work.Power users willing to pay $200/mo for a browser bot.Course creators, multilingual marketers, anyone scaling video content.Developers who need sub-100ms LLM responses.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier. Still early. Manus is more flexible for less money.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.S-tier for speed. When latency is the product, start here.
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