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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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Coding
Image
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Audio
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Agents
Dev Platform
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Devin
A
DALL-E 3
B
Cursor
S
NotebookLM
S
TaglineCognition Labs' autonomous coding engineer.OpenAI's image model. Built into ChatGPT Plus.VS Code fork that made AI coding actually work.Google's research notebook. Turns your docs into a podcast.
CategoryAgentsImageCodingResearch
Pricing$500/moIncluded with ChatGPT Plus $20/moFree + $20/mo Pro + $40/mo BusinessFree
Best forEngineering teams offloading tickets. Ops/platform work.ChatGPT Plus users who want images without paying extra.Developers. Non-developers who want to ship working code.Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Google-only
  • Can be slow on large corpora
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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