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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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GitHub Copilot
B
OpenAI Voice / Realtime
S
Rows
A
Gamma
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.ChatGPT's voice + the Realtime API for developers.Spreadsheets with AI + live integrations baked in.AI slide decks that don't look AI-generated.
Categorycodingvoicedataproductivity
PricingFree (limited) + $10/mo Pro + $19/mo BusinessVoice included with ChatGPT Plus; Realtime API by usageFree + $19-$89/user/moFree + $10-$20/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Voice chat users, developers building voice agents on OpenAI.Ops teams, marketers, anyone building dashboards from multiple sources.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
LinkOpen →Open →Open →Open →