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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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Chatbots
Research
Coding
Image
Video
Voice
Meetings
Design
Productivity
Audio
Writing
Agents
Dev Platform
Data
Marketing
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Devin
A
Luma Dream Machine
A
Descript
S
Perplexity
S
TaglineCognition Labs' autonomous coding engineer.Smooth, cinematic motion. Image-to-video specialist.Edit video + podcasts by editing the transcript.AI search done right. Cited answers, not chat theater.
CategoryAgentsVideoVideoResearch
Pricing$500/moFree + $10-$500/moFree + $16-$50/moFree + $20/mo Pro
Best forEngineering teams offloading tickets. Ops/platform work.Photographers animating stills, cinematic b-roll.Podcasters, course creators, anyone editing talking-head content.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
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
  • Edit audio/video by deleting text
  • Overdub (voice clone) for fixes
  • Strong collaboration + remote recording
  • 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
  • Prompt fidelity below Runway
  • Queue times on free tier
  • Not a traditional NLE — some workflows awkward
  • Overdub ethics require care
  • 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. Best for cinematic image-to-video. Pair with Runway for coverage.S-tier for content creators. Cuts editing time in half. Non-obvious but life-changing.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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