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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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Claude Code
S
Windsurf
A
Groq
S
Cartesia
S
TaglineAnthropic's CLI agent. Opus-powered, operates on your repo directly.Codeium's agentic IDE. Cascade agent + strong free tier.The fastest AI inference in the world. Crazy low latency.Ultra-low-latency voice. Built for realtime agents.
Categorycodingcodingdev platformvoice
PricingPart of Claude Pro/Max/Team plansFree + $15/mo ProFree tier + pay-as-you-go APIFree tier + usage-based API
Best forDevelopers who want an agent, not autocomplete. Large refactors, tests, docs.Developers who want Cursor-like power for less money.Developers who need sub-100ms LLM responses.Developers building voice agents, phone bots, interactive apps.
Strengths
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • < 90ms latency — the fastest in the market
  • Sonic model sounds natural
  • Developer-friendly API
Weaknesses
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Smaller community
  • Model selection more limited
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Fewer voices than ElevenLabs
  • Less consumer-facing brand
Kai's verdictS-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. Close second to Cursor. If $5/mo matters, start here.S-tier for speed. When latency is the product, start here.S-tier for realtime. If latency matters more than voice catalog, start here.
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