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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
Kling
A
Flux (Black Forest Labs)
A
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Kuaishou's video model. The surprise standout.Open weights + strong photorealism. The open-source answer.
Categorycodingvideoimage
PricingFree + $15/mo ProCredit-based, free trialAPI + open weights (Schnell is Apache 2.0)
Best forDevelopers who want Cursor-like power for less money.Anyone who wants top-tier video quality for less.Developers + power users who want control and privacy.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
Weaknesses
  • Smaller community
  • Model selection more limited
  • UX is rough for English speakers
  • Queue times
  • Harder to use than hosted tools
  • Needs infra
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.A-tier. S-tier if you self-host. The reason open-source image gen matters.
LinkOpen →Open →Open →