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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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S
Cursor
S
Groq
S
Kling
A
TaglineRun any open-source AI model with an API call.VS Code fork that made AI coding actually work.The fastest AI inference in the world. Crazy low latency.Kuaishou's video model. The surprise standout.
CategoryDev PlatformCodingDev PlatformVideo
PricingPay per second of computeFree + $20/mo Pro + $40/mo BusinessFree tier + pay-as-you-go APICredit-based, free trial
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers. Non-developers who want to ship working code.Developers who need sub-100ms LLM responses.Anyone who wants top-tier video quality for less.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • UX is rough for English speakers
  • Queue times
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for speed. When latency is the product, start here.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.
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