wangzhang wu

Claude has the best instruction-following and tool-use capabilities among all models we tested. For a writing agent that needs to precisely edit documents, search legal databases, and run code — getting tool calls right every time is critical. Claude also excels at nuanced writing tasks: it understands tone, preserves voice, and produces edits that feel human. Extended thinking gives it genuine reasoning ability for complex multi-step tasks. Finally, Anthropic's server-side tools (code execution sandbox, web fetch) let us ship features like data analysis without building our own infrastructure.

Claude's 200K context window and extended thinking capability make it perfect for document editing. Unlike other LLMs, Claude can reason through complex writing tasks and provide transparent thought processes - exactly what we needed for an AI editor that "thinks with you."