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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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A
OpenAI Voice / Realtime
S
Claude Code
S
Devin
A
TaglineSpreadsheets with AI + live integrations baked in.ChatGPT's voice + the Realtime API for developers.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Cognition Labs' autonomous coding engineer.
CategoryDataVoiceCodingAgents
PricingFree + $19-$89/user/moVoice included with ChatGPT Plus; Realtime API by usagePart of Claude Pro/Max/Team plans$500/mo
Best forOps teams, marketers, anyone building dashboards from multiple sources.Voice chat users, developers building voice agents on OpenAI.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictA-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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