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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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Cline
A
MagicSchool
S
Perplexity
S
TaglineOpen-source VS Code agent. Reads + writes + runs.AI platform built for teachers. Lesson plans + IEPs + admin.AI search done right. Cited answers, not chat theater.
CategoryCodingEducationResearch
PricingFree (open source) + your API costsFree + $100/yr Plus + school plansFree + $20/mo Pro
Best forVS Code users who want agentic coding without changing IDEs.Teachers prepping materials. School districts.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • 60+ teacher-specific tools
  • Generous free tier
  • FERPA + COPPA compliant for schools
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Teacher-only focus
  • Less useful for students
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier for teachers. If you teach K-12, start here this week.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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