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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
Manus
S
ChatGPT Operator
B
TaglineChatGPT's voice + the Realtime API for developers.VS Code fork that made AI coding actually work.Autonomous AI agent that actually finishes tasks.OpenAI's browser agent. Clicks and types on websites for you.
CategoryVoiceCodingAgentsAgents
PricingVoice included with ChatGPT Plus; Realtime API by usageFree + $20/mo Pro + $40/mo BusinessFree tier + $39-$199/moIncluded with ChatGPT Pro $200/mo
Best forVoice chat users, developers building voice agents on OpenAI.Developers. Non-developers who want to ship working code.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.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
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • 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
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • 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 coding. If you write code of any kind, this pays back the $20 in a day.S-tier in the agent category. The first one I'd give to a non-technical friend.B-tier. Still early. Manus is more flexible for less money.
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