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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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OpenAI Voice / Realtime
S
HeyGen
S
Manus
S
TaglineChatGPT's voice + the Realtime API for developers.AI avatar videos. Record once, speak any language.Autonomous AI agent that actually finishes tasks.
CategoryVoiceVideoAgents
PricingVoice included with ChatGPT Plus; Realtime API by usageFree + $24-$65/moFree tier + $39-$199/mo
Best forVoice chat users, developers building voice agents on OpenAI.Course creators, multilingual marketers, anyone scaling video content.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
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
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
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
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
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.S-tier in the agent category. The first one I'd give to a non-technical friend.
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