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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
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
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Devin
A
Kling
A
Copy.ai
A
Perplexity
S
TaglineCognition Labs' autonomous coding engineer.Kuaishou's video model. The surprise standout.AI GTM platform. Workflows for sales + marketing ops.AI search done right. Cited answers, not chat theater.
CategoryAgentsVideoMarketingResearch
Pricing$500/moCredit-based, free trialFree + $49-$249/moFree + $20/mo Pro
Best forEngineering teams offloading tickets. Ops/platform work.Anyone who wants top-tier video quality for less.RevOps + marketing ops automating repetitive tasks.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Workflow builder for GTM automations
  • CRM enrichment + outbound sequences
  • Scales better than ad-hoc prompts
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • UX is rough for English speakers
  • Queue times
  • Overlaps with general chatbots
  • Workflow setup takes time
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.A-tier for ops automation. B-tier for simple copy (use Claude).S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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