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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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chat
research
coding
image
video
voice
meeting
design
productivity
audio
writing
agents
dev platform
data
marketing
education
GitHub Copilot
B
Sora
A
Cartesia
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.OpenAI's video model. Long clips, cinematic quality.Ultra-low-latency voice. Built for realtime agents.
Categorycodingvideovoice
PricingFree (limited) + $10/mo Pro + $19/mo BusinessIncluded with ChatGPT Plus/ProFree tier + usage-based API
Best forTeams with GitHub already. Devs who don't want to change IDEs.ChatGPT subscribers experimenting with cinematic shots.Developers building voice agents, phone bots, interactive apps.
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
  • < 90ms latency — the fastest in the market
  • Sonic model sounds natural
  • Developer-friendly API
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
  • Fewer voices than ElevenLabs
  • Less consumer-facing brand
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 realtime. If latency matters more than voice catalog, start here.
LinkOpen →Open →Open →