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OpenAI Voice / Realtime
S
HeyGen
S
TaglineChatGPT's voice + the Realtime API for developers.AI avatar videos. Record once, speak any language.
CategoryVoiceVideo
PricingVoice included with ChatGPT Plus; Realtime API by usageFree + $24-$65/mo
Best forVoice chat users, developers building voice agents on OpenAI.Course creators, multilingual marketers, anyone scaling video content.
Strengths
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
Weaknesses
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
Kai's verdictS-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.
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