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OpenAI Voice / Realtime
S
Duolingo Max
A
GitHub Copilot
B
Hume AI
A
TaglineChatGPT's voice + the Realtime API for developers.Duolingo + AI. Explain My Answer + Roleplay features.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Voice AI that reads + expresses emotion.
CategoryVoiceEducationCodingVoice
PricingVoice included with ChatGPT Plus; Realtime API by usage$30/mo (or ~$168/yr)Free (limited) + $10/mo Pro + $19/mo BusinessFree tier + pay-as-you-go
Best forVoice chat users, developers building voice agents on OpenAI.Language learners who've outgrown basic Duolingo.Teams with GitHub already. Devs who don't want to change IDEs.Therapy apps, customer service, any voice agent where emotion matters.
Strengths
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
Weaknesses
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Niche use case
  • Pricing ramps fast
Kai's verdictS-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.A-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier in its niche. The only one that actually gets emotion right.
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