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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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Groq
S
Claude Code
S
Cline
A
OpenRouter
S
TaglineThe fastest AI inference in the world. Crazy low latency.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Open-source VS Code agent. Reads + writes + runs.One API, every model. Pay-as-you-go, no subscriptions.
CategoryDev PlatformCodingCodingDev Platform
PricingFree tier + pay-as-you-go APIPart of Claude Pro/Max/Team plansFree (open source) + your API costsPay per token — model-dependent
Best forDevelopers who need sub-100ms LLM responses.Developers who want an agent, not autocomplete. Large refactors, tests, docs.VS Code users who want agentic coding without changing IDEs.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictS-tier for speed. When latency is the product, start here.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier for model-shopping. I use this for every prototype before committing.
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