feat: DIA-1725: add model-metadata endpoint (#279)

Co-authored-by: Matt Bernstein <matt@humansignal.com>
Co-authored-by: matt-bernstein <matt-bernstein@users.noreply.github.com>

adala/runtimes/_litellm.py

@@ -815,3 +815,22 @@ async def batch_to_batch(
         return output_df.set_index(batch.index)
 
     # TODO: cost estimate
+
+def get_model_info(provider: str, model_name: str, auth_info: Optional[dict]=None) -> dict:
+    if auth_info is None:
+        auth_info = {}
+    try:
+        # for azure models, need to get the canonical name for the model
+        if provider == "azure":
+            dummy_completion = litellm.completion(
+                model=f"azure/{model_name}",
+                messages=[{"role": "user", "content": ""}],
+                max_tokens=1,
+                **auth_info
+            )
+            model_name = dummy_completion.model
+        full_name = f"{provider}/{model_name}"
+        return litellm.get_model_info(full_name)
+    except Exception as err:
+        logger.error("Hit error when trying to get model metadata: %s", err)
+        return {}

server/app.py

@@ -424,6 +424,27 @@ async def improved_prompt(request: ImprovedPromptRequest):
     )
 
 
+class ModelMetadataRequestItem(BaseModel):
+    provider: str
+    model_name: str
+    auth_info: Optional[Dict[str, str]] = None
+
+class ModelMetadataRequest(BaseModel):
+    models: List[ModelMetadataRequestItem]
+
+class ModelMetadataResponse(BaseModel):
+    model_metadata: Dict[str, Dict]
+
+@app.post("/model-metadata", response_model=Response[ModelMetadataResponse])
+async def model_metadata(request: ModelMetadataRequest):
+    from adala.runtimes._litellm import get_model_info
+
+    resp = {'model_metadata': {item.model_name: get_model_info(**item.model_dump()) for item in request.models}}
+    return Response[ModelMetadataResponse](
+        success=True,
+        data=resp
+    )
+
 if __name__ == "__main__":
     # for debugging
     uvicorn.run("app:app", host="0.0.0.0", port=30001)