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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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Agents
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Cline
A
GitHub Copilot
B
Kling
A
Elicit
S
TaglineOpen-source VS Code agent. Reads + writes + runs.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Kuaishou's video model. The surprise standout.AI research assistant for academic literature.
CategoryCodingCodingVideoResearch
PricingFree (open source) + your API costsFree (limited) + $10/mo Pro + $19/mo BusinessCredit-based, free trialFree + $12-$42/mo
Best forVS Code users who want agentic coding without changing IDEs.Teams with GitHub already. Devs who don't want to change IDEs.Anyone who wants top-tier video quality for less.Grad students, researchers, anyone doing literature reviews.
Strengths
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
Weaknesses
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • UX is rough for English speakers
  • Queue times
  • Academic-only
  • Can hallucinate citations — verify everything
Kai's verdictA-tier. Best free agentic option in VS Code. Use with Claude for best results.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.S-tier for academic research. Nothing else comes close for systematic reviews.
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