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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
Cursor
S
ChatGPT Operator
B
Devin
A
TaglineChatGPT's voice + the Realtime API for developers.VS Code fork that made AI coding actually work.OpenAI's browser agent. Clicks and types on websites for you.Cognition Labs' autonomous coding engineer.
CategoryVoiceCodingAgentsAgents
PricingVoice included with ChatGPT Plus; Realtime API by usageFree + $20/mo Pro + $40/mo BusinessIncluded with ChatGPT Pro $200/mo$500/mo
Best forVoice chat users, developers building voice agents on OpenAI.Developers. Non-developers who want to ship working code.Power users willing to pay $200/mo for a browser bot.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.B-tier. Still early. Manus is more flexible for less money.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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