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Function Calling

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In Short

A structured mechanism for LLMs to invoke predefined functions with properly formatted arguments.

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Function calling provides a reliable interface between LLMs and external tools, reducing parsing errors and enabling complex integrations.

How It Works

  1. Functions defined with schemas
  2. Model decides when to call
  3. Arguments extracted in structured format
  4. Function executed by application
  5. Result returned to model

Benefits

  • Type-safe arguments
  • Reliable parsing
  • Clear API contracts
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