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Function Calling

1. Use Cases​

Function Calling allows a model to invoke external tools to augment its capabilities. With the model acting as the “brain” and tools as actuators (for example: searching external knowledge, checking itineraries, or calling domain‑specific utilities), you can effectively mitigate hallucinations and keep answers up to date.

2. How To Use​

2.1 Add a tools parameter via the REST API​

Add the tools field to the request body.

Example payload:

{
  "model": "deepseek-ai/DeepSeek-V2.5",
  "messages": [
    {
      "role": "user",
      "content": "What opportunities and challenges will China’s LLM industry face in 2025?"
    }
  ],
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "actual_function_name_to_execute",
        "description": "Describe what this function does",
        "parameters": {
          "_comments": "Describe the function parameters here"
        }
      }
    },
    {
      "_comments": "Other function-related notes"
    }
  ],
  "_comments": "Other request fields"
}