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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
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Video
Audio
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Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Grammarly
A
Ideogram
S
Rows
A
OpenAI Voice / Realtime
S
TaglineGrammar check + tone + AI drafting, everywhere you type.The one that actually gets text in images right.Spreadsheets with AI + live integrations baked in.ChatGPT's voice + the Realtime API for developers.
CategoryWritingImageDataVoice
PricingFree + $12-$15/mo Premium + team plansFree + $8/mo + $20/mo + $60/moFree + $19-$89/user/moVoice included with ChatGPT Plus; Realtime API by usage
Best forNon-native English writers, business email, anyone who types a lot.Anything with text — posters, ads, album covers, slide decks.Ops teams, marketers, anyone building dashboards from multiple sources.Voice chat users, developers building voice agents on OpenAI.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Aesthetic ceiling below Midjourney
  • Less style variety
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier for text-in-image. Use this for posters, Midjourney for art.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.
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