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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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Windsurf
A
Runway
S
Claude Agent SDK
S
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.The pro's AI video tool. Gen-4 is the current bar.Anthropic's SDK for building your own agents on Claude.
Categorycodingvideoagents
PricingFree + $15/mo ProFree + $15-$95/moAPI usage + SDK is free
Best forDevelopers who want Cursor-like power for less money.Marketing video, pitch decks, b-roll, creative shorts.Developers building custom agents for their own company/product.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Smaller community
  • Model selection more limited
  • Expensive at scale
  • Still needs post-editing
  • Developer-only
  • You build the UI
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.S-tier. Market leader with reason. Start here for serious video.S-tier for builders. The right primitives. What Kai is built on under the hood.
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