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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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GitHub Copilot
B
Sora
A
OpenAI Voice / Realtime
S
Duolingo Max
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.OpenAI's video model. Long clips, cinematic quality.ChatGPT's voice + the Realtime API for developers.Duolingo + AI. Explain My Answer + Roleplay features.
CategoryCodingVideoVoiceEducation
PricingFree (limited) + $10/mo Pro + $19/mo BusinessIncluded with ChatGPT Plus/ProVoice included with ChatGPT Plus; Realtime API by usage$30/mo (or ~$168/yr)
Best forTeams with GitHub already. Devs who don't want to change IDEs.ChatGPT subscribers experimenting with cinematic shots.Voice chat users, developers building voice agents on OpenAI.Language learners who've outgrown basic Duolingo.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.A-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.
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