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S
OpenAI Voice / Realtime
S
ChatGPT Operator
B
Groq
S
TaglineRun any open-source AI model with an API call.ChatGPT's voice + the Realtime API for developers.OpenAI's browser agent. Clicks and types on websites for you.The fastest AI inference in the world. Crazy low latency.
CategoryDev PlatformVoiceAgentsDev Platform
PricingPay per second of computeVoice included with ChatGPT Plus; Realtime API by usageIncluded with ChatGPT Pro $200/moFree tier + pay-as-you-go API
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Voice chat users, developers building voice agents on OpenAI.Power users willing to pay $200/mo for a browser bot.Developers who need sub-100ms LLM responses.
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
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
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.B-tier. Still early. Manus is more flexible for less money.S-tier for speed. When latency is the product, start here.
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