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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
Rows
A
Claude Code
S
Cartesia
S
TaglineThe fastest AI inference in the world. Crazy low latency.Spreadsheets with AI + live integrations baked in.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Ultra-low-latency voice. Built for realtime agents.
CategoryDev PlatformDataCodingVoice
PricingFree tier + pay-as-you-go APIFree + $19-$89/user/moPart of Claude Pro/Max/Team plansFree tier + usage-based API
Best forDevelopers who need sub-100ms LLM responses.Ops teams, marketers, anyone building dashboards from multiple sources.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Developers building voice agents, phone bots, interactive apps.
Strengths
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • < 90ms latency — the fastest in the market
  • Sonic model sounds natural
  • Developer-friendly API
Weaknesses
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Fewer voices than ElevenLabs
  • Less consumer-facing brand
Kai's verdictS-tier for speed. When latency is the product, start here.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for realtime. If latency matters more than voice catalog, start here.
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