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Devin
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OpenAI Voice / Realtime
S
TaglineVS Code fork that made AI coding actually work.Cognition Labs' autonomous coding engineer.ChatGPT's voice + the Realtime API for developers.
Categorycodingagentsvoice
PricingFree + $20/mo Pro + $40/mo Business$500/moVoice included with ChatGPT Plus; Realtime API by usage
Best forDevelopers. Non-developers who want to ship working code.Engineering teams offloading tickets. Ops/platform work.Voice chat users, developers building voice agents on OpenAI.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.
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