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Claude

Free tier

Anthropic's safety-focused AI assistant — exceptional at long documents and nuanced reasoning.

Free tier available·All audiences·Powered by Anthropic·API available
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Key strengths

200K context windowcodinglong document analysisinstruction following
Free tier + paid plans · from $20 USD/mo
San Francisco, US
Founded 2021
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  • Large codebase Q&A: paste an entire repo context and ask architectural questions
  • Structured extraction: use tool_use to extract JSON from unstructured text reliably
  • Diff review: paste a large diff and ask Claude to identify logic bugs
  • Migration planning: "Migrate this Express.js code to Hono + TypeScript"