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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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S
GitHub Copilot
B
Bolt.new (StackBlitz)
A
Stable Audio
A
TaglineRun any open-source AI model with an API call.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Prompt to deployed full-stack app in the browser.Stability AI's open audio model. Loops + SFX + background.
Categorydev platformcodingcodingaudio
PricingPay per second of computeFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20-$200/moFree + $12/mo Pro + enterprise
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Teams with GitHub already. Devs who don't want to change IDEs.PMs, founders, non-devs shipping MVPs.Game developers, podcasters needing SFX, video creators needing background music.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Open-weight model available
  • Great for loops + game audio + SFX
  • Commercial-use clarity
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Not for full songs with vocals
  • Shorter generation limits
Kai's verdictS-tier for open-source model APIs. The default in this space.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Best for fast prototypes. Competitive with Lovable — try both.A-tier for its niche. Different use case than Suno — SFX and loops, not songs.
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