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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
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Groq
S
TaglineVS Code fork that made AI coding actually work.Autonomous AI agent that actually finishes tasks.AI research assistant for academic literature.The fastest AI inference in the world. Crazy low latency.
CategoryCodingAgentsResearchDev Platform
PricingFree + $20/mo Pro + $40/mo BusinessFree tier + $39-$199/moFree + $12-$42/moFree tier + pay-as-you-go API
Best forDevelopers. Non-developers who want to ship working code.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Grad students, researchers, anyone doing literature reviews.Developers who need sub-100ms LLM responses.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Academic-only
  • Can hallucinate citations — verify everything
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier in the agent category. The first one I'd give to a non-technical friend.S-tier for academic research. Nothing else comes close for systematic reviews.S-tier for speed. When latency is the product, start here.
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