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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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HeyGen
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Devin
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DeepSeek
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TaglineVS Code fork that made AI coding actually work.AI avatar videos. Record once, speak any language.Cognition Labs' autonomous coding engineer.Chinese open-weight powerhouse. Crazy cheap, genuinely smart.
Categorycodingvideoagentschat
PricingFree + $20/mo Pro + $40/mo BusinessFree + $24-$65/mo$500/moFree web + ultra-cheap API (~$0.14/M input tokens)
Best forDevelopers. Non-developers who want to ship working code.Course creators, multilingual marketers, anyone scaling video content.Engineering teams offloading tickets. Ops/platform work.Developers + cost-conscious builders. Anyone fine with self-hosting.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.
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