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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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S
OpenAI Voice / Realtime
S
Perplexity
S
ChatGPT Operator
B
TaglineRun any open-source AI model with an API call.ChatGPT's voice + the Realtime API for developers.AI search done right. Cited answers, not chat theater.OpenAI's browser agent. Clicks and types on websites for you.
CategoryDev PlatformVoiceResearchAgents
PricingPay per second of computeVoice included with ChatGPT Plus; Realtime API by usageFree + $20/mo ProIncluded with ChatGPT Pro $200/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Voice chat users, developers building voice agents on OpenAI.Replacing Google for any question where you want a cited answer in seconds.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.B-tier. Still early. Manus is more flexible for less money.
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