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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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Cursor
S
Cline
A
OpenRouter
S
GitHub Copilot
B
TaglineVS Code fork that made AI coding actually work.Open-source VS Code agent. Reads + writes + runs.One API, every model. Pay-as-you-go, no subscriptions.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
Categorycodingcodingdev platformcoding
PricingFree + $20/mo Pro + $40/mo BusinessFree (open source) + your API costsPay per token — model-dependentFree (limited) + $10/mo Pro + $19/mo Business
Best forDevelopers. Non-developers who want to ship working code.VS Code users who want agentic coding without changing IDEs.Developers experimenting across models. Apps that want fallback logic.Teams with GitHub already. Devs who don't want to change IDEs.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • 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
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Slight markup over direct API
  • Some provider features not exposed
  • Less agentic than Cursor/Claude Code
  • Model quality varies
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Best free agentic option in VS Code. Use with Claude for best results.S-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.
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