Get Logs Metric

Returns the reduction metric for filtered values (base + derived) for one or more keys from a project.

This endpoint supports three modes of operation:

1. Single key, no grouping: Returns a single metric value Example:

   GET /logs/metric/mean?key=score
   

   Response:

   4.56
   

2. Multiple keys, no grouping: Returns a dict mapping keys to metric values Example:

   GET /logs/metric/mean?key=["score","length"]
   

   Response:

   {"score": 4.56, "length": 120}
   

3. With grouping: Returns metrics grouped by one or more fields Example:

   GET /logs/metric/mean with body {"key": "score", "group_by": "model"}
   

   Response:

   {"gpt-4": 4.56, "gpt-3.5": 3.78}
   

   For nested grouping, provide a list of fields: Example:

   GET /logs/metric/mean with body {"key": "score", "group_by": ["model", "temperature"]}
   

   Response:

   {"gpt-4": {"0.7": 4.56, "0.9": 4.23}, "gpt-3.5": {"0.7": 3.78, "0.9": 3.45}}
   

The group_by parameter can be a string for single-level grouping or a list of strings for nested grouping. Each group_by field can be prefixed with "params/" to indicate it's a parameter.