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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
v0
S
OpenAI Voice / Realtime
S
Gamma
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Vercel's AI-powered UI generator. Prompt to shadcn component.ChatGPT's voice + the Realtime API for developers.AI slide decks that don't look AI-generated.
CategoryCodingDesignVoiceProductivity
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/moVoice included with ChatGPT Plus; Realtime API by usageFree + $10-$20/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Frontend devs, PMs prototyping UIs, anyone on Next.js.Voice chat users, developers building voice agents on OpenAI.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Best for shadcn stack
  • Iterating can be fiddly
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • 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. If you're on Vercel/shadcn, this is cheating.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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