Compare AI tools
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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Duolingo Max A | Devin A | Claude Code S | Rows A | |
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| Tagline | Duolingo + AI. Explain My Answer + Roleplay features. | Cognition Labs' autonomous coding engineer. | Anthropic's CLI agent. Opus-powered, operates on your repo directly. | Spreadsheets with AI + live integrations baked in. |
| Category | Education | Agents | Coding | Data |
| Pricing | $30/mo (or ~$168/yr) | $500/mo | Part of Claude Pro/Max/Team plans | Free + $19-$89/user/mo |
| Best for | Language learners who've outgrown basic Duolingo. | Engineering teams offloading tickets. Ops/platform work. | Developers who want an agent, not autocomplete. Large refactors, tests, docs. | Ops teams, marketers, anyone building dashboards from multiple sources. |
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| Kai's verdict | A-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead. | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. | A-tier. The most interesting spreadsheet in years. Great for ops dashboards. |
| Link | Open → | Open → | Open → | Open → |