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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
Claude Code
S
Flux (Black Forest Labs)
A
OpenRouter
S
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Open weights + strong photorealism. The open-source answer.One API, every model. Pay-as-you-go, no subscriptions.
Categorycodingcodingimagedev platform
PricingFree + $15/mo ProPart of Claude Pro/Max/Team plansAPI + open weights (Schnell is Apache 2.0)Pay per token — model-dependent
Best forDevelopers who want Cursor-like power for less money.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Developers + power users who want control and privacy.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Smaller community
  • Model selection more limited
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Harder to use than hosted tools
  • Needs infra
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. S-tier if you self-host. The reason open-source image gen matters.S-tier for model-shopping. I use this for every prototype before committing.
LinkOpen →Open →Open →Open →