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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
Aider
A
Kling
A
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Terminal-based AI pair programmer. Git-aware, model-flexible.Kuaishou's video model. The surprise standout.
Categorycodingcodingvideo
PricingFree + $15/mo ProFree (open source) + whatever API you useCredit-based, free trial
Best forDevelopers who want Cursor-like power for less money.Developers who want open-source tooling with full control.Anyone who wants top-tier video quality for less.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
Weaknesses
  • Smaller community
  • Model selection more limited
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • UX is rough for English speakers
  • Queue times
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.
LinkOpen →Open →Open →