Usage

Ollama's API responses include metrics that can be used for measuring performance and model usage:
total_duration: How long the response took to generate
load_duration: How long the model took to load
prompt_eval_count: How many input tokens were in the prompt
prompt_eval_cached_count: How many prompt tokens were read from the cache
prompt_eval_duration: How long it took to evaluate the uncached prompt tokens
eval_count: How many output tokens were processes
eval_duration: How long it took to generate the output tokens
All timing values are measured in nanoseconds.
Example response
For endpoints that return usage metrics, the response body will include the usage fields. For example, a non-streaming call to 
/api/generate may return the following response:
{
  "model": "gemma4",
  "created_at": "2025-10-17T23:14:07.414671Z",
  "response": "Hello! How can I help you today?",
  "done": true,
  "done_reason": "stop",
  "total_duration": 174560334,
  "load_duration": 101397084,
  "prompt_eval_count": 11,
  "prompt_eval_cached_count": 8,
  "prompt_eval_duration": 13074791,
  "eval_count": 18,
  "eval_duration": 52479709
}
For endpoints that return streaming responses, usage fields are included as part of the final chunk, where 
done is 
true.