Missing prompt_tokens and total_tokens in Usage Object Returned in DeepSeek Model

[k99k5]

What Happened?

{
    "id": "74196500-8b9b-475a-aab3-381cec604587",
    "object": "chat.completion.chunk",
    "created": 1736352401,
    "choices": [
      {
        "index": 0,
        "finish_reason": "stop",
        "message": {
          "role": "assistant",
          "content": "\nif (isset($_POST['like'])) {\n    echo 'Thank you for your support!';\n}\n?>\n"
        }
      }
    ],
    "model": "deepseek-chat",
    "usage": {
      "completion_tokens": 25
    }
  }

What Should Have Happened?

The official API returns the following response:

{"id":"577145fa-34cb-4cc4-b937-6f8e03eafa79","object":"chat.completion.chunk","created":1736355607,"model":"deepseek-chat","system_fingerprint":"fp_3a5770e1b4","choices":[{"index":0,"delta":{"content":""},"logprobs":null,"finish_reason":"stop"}],"usage":{"prompt_tokens":9,"completion_tokens":11,"total_tokens":20,"prompt_cache_hit_tokens":0,"prompt_cache_miss_tokens":9}}

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