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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
Fathom
S
ChatGPT Operator
B
TaglineChatGPT's voice + the Realtime API for developers.Meeting notes, free forever for individuals.OpenAI's browser agent. Clicks and types on websites for you.
CategoryVoiceMeetingsAgents
PricingVoice included with ChatGPT Plus; Realtime API by usageFree for individuals + $15-$29/user/mo teamsIncluded with ChatGPT Pro $200/mo
Best forVoice chat users, developers building voice agents on OpenAI.Solo operators, freelancers, small teams on a budget.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Bot-joining model
  • Team features gated
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictS-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.S-tier for solo + free. The best free option, hands down.B-tier. Still early. Manus is more flexible for less money.
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