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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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OpenRouter
S
GitHub Copilot
B
Runway
S
Windsurf
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.The pro's AI video tool. Gen-4 is the current bar.Codeium's agentic IDE. Cascade agent + strong free tier.
Categorydev platformcodingvideocoding
PricingPay per token — model-dependentFree (limited) + $10/mo Pro + $19/mo BusinessFree + $15-$95/moFree + $15/mo Pro
Best forDevelopers experimenting across models. Apps that want fallback logic.Teams with GitHub already. Devs who don't want to change IDEs.Marketing video, pitch decks, b-roll, creative shorts.Developers who want Cursor-like power for less money.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive at scale
  • Still needs post-editing
  • Smaller community
  • Model selection more limited
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier. Market leader with reason. Start here for serious video.A-tier. Close second to Cursor. If $5/mo matters, start here.
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