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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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Agents
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Manus
S
Devin
A
Groq
S
HeyGen
S
TaglineAutonomous AI agent that actually finishes tasks.Cognition Labs' autonomous coding engineer.The fastest AI inference in the world. Crazy low latency.AI avatar videos. Record once, speak any language.
CategoryAgentsAgentsDev PlatformVideo
PricingFree tier + $39-$199/mo$500/moFree tier + pay-as-you-go APIFree + $24-$65/mo
Best forPeople who want to hand off tasks entirely — trip planning, research, spreadsheet building.Engineering teams offloading tickets. Ops/platform work.Developers who need sub-100ms LLM responses.Course creators, multilingual marketers, anyone scaling video content.
Strengths
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
Weaknesses
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
Kai's verdictS-tier in the agent category. The first one I'd give to a non-technical friend.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for speed. When latency is the product, start here.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.
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