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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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DALL-E 3
B
Cursor
S
Lex
A
Claude Agent SDK
S
TaglineOpenAI's image model. Built into ChatGPT Plus.VS Code fork that made AI coding actually work.Google Docs with an AI collaborator baked in.Anthropic's SDK for building your own agents on Claude.
CategoryImageCodingWritingAgents
PricingIncluded with ChatGPT Plus $20/moFree + $20/mo Pro + $40/mo BusinessFree + $12/moAPI usage + SDK is free
Best forChatGPT Plus users who want images without paying extra.Developers. Non-developers who want to ship working code.Essays, long-form drafts, thinking on the page.Developers building custom agents for their own company/product.
Strengths
  • 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
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Developer-only
  • You build the UI
Kai's verdictB-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.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for builders. The right primitives. What Kai is built on under the hood.
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