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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Coding
Image
Productivity
Writing
Marketing
Claude Agent SDK S | Devin A | |
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| Tagline | Anthropic's SDK for building your own agents on Claude. | Cognition Labs' autonomous coding engineer. |
| Category | Agents | Agents |
| Pricing | API usage + SDK is free | $500/mo |
| Best for | Developers building custom agents for their own company/product. | Engineering teams offloading tickets. Ops/platform work. |
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| Kai's verdict | S-tier for builders. The right primitives. What Kai is built on under the hood. | A-tier for the right use case. Not for solo devs. If you manage engineers, try one license. |
| Link | Open → | Open → |