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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
Devin
A
Groq
S
Manus
S
TaglineVS Code fork that made AI coding actually work.Cognition Labs' autonomous coding engineer.The fastest AI inference in the world. Crazy low latency.Autonomous AI agent that actually finishes tasks.
CategoryCodingAgentsDev PlatformAgents
PricingFree + $20/mo Pro + $40/mo Business$500/moFree tier + pay-as-you-go APIFree tier + $39-$199/mo
Best forDevelopers. Non-developers who want to ship working code.Engineering teams offloading tickets. Ops/platform work.Developers who need sub-100ms LLM responses.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for speed. When latency is the product, start here.S-tier in the agent category. The first one I'd give to a non-technical friend.
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