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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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Leonardo.ai
A
Rows
A
GitHub Copilot
B
Cartesia
S
TaglineGamer + creator image gen with model fine-tuning built in.Spreadsheets with AI + live integrations baked in.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Ultra-low-latency voice. Built for realtime agents.
CategoryImageDataCodingVoice
PricingFree + $12-$60/moFree + $19-$89/user/moFree (limited) + $10/mo Pro + $19/mo BusinessFree tier + usage-based API
Best forIndie game devs, illustrators, anyone training custom style models.Ops teams, marketers, anyone building dashboards from multiple sources.Teams with GitHub already. Devs who don't want to change IDEs.Developers building voice agents, phone bots, interactive apps.
Strengths
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • < 90ms latency — the fastest in the market
  • Sonic model sounds natural
  • Developer-friendly API
Weaknesses
  • General output behind Midjourney
  • Can be overwhelming
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Fewer voices than ElevenLabs
  • Less consumer-facing brand
Kai's verdictA-tier for creators training custom looks. B-tier for general use.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for realtime. If latency matters more than voice catalog, start here.
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