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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
Audio
Research
Agents
Coding
Chatbots
Image
Video
Voice
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Claude Agent SDK
S
DALL-E 3
B
Lex
A
Ideogram
S
TaglineAnthropic's SDK for building your own agents on Claude.OpenAI's image model. Built into ChatGPT Plus.Google Docs with an AI collaborator baked in.The one that actually gets text in images right.
CategoryAgentsImageWritingImage
PricingAPI usage + SDK is freeIncluded with ChatGPT Plus $20/moFree + $12/moFree + $8/mo + $20/mo + $60/mo
Best forDevelopers building custom agents for their own company/product.ChatGPT Plus users who want images without paying extra.Essays, long-form drafts, thinking on the page.Anything with text — posters, ads, album covers, slide decks.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
Weaknesses
  • Developer-only
  • You build the UI
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Aesthetic ceiling below Midjourney
  • Less style variety
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for text-in-image. Use this for posters, Midjourney for art.
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