fix how to get the right provider (#280)

Signed-off-by: kerthcet <kerthcet@gmail.com>

Author: kerthcet

alphatrion/tracing/cost_enrichment_processor.py

@@ -55,14 +55,14 @@ def on_end(self, span: ReadableSpan):
 
             # Extract token usage
             attributes = span.attributes
-            # OpenAI SDK populates the `gen_ai.openai.api_base` with base URL
-            # whereas Bedrock SDK either only populates the `gen_ai.system` with "AWS"
-            # or the `gen_ai.provider.name` with "aws.bedrock"
+            # Keep getting the provider from api_base first because some providers (like DeepInfra)
+            # don't set the provider name in the attributes, it's still OPENAI, which is not correct.
             provider = determine_provider(
                 str(
                     attributes.get("gen_ai.openai.api_base")
-                    or attributes.get("gen_ai.system")
                     or attributes.get("gen_ai.provider.name")
+                    # Being deprecated in favor of `gen_ai.provider.name`
+                    or attributes.get("gen_ai.system")
                 )
             )
             model = str(