pydantic
diff --git a/‎pydantic_ai_slim/pydantic_ai/models/instrumented.py‎
Lines changed: 5 additions & 0 deletions b/‎pydantic_ai_slim/pydantic_ai/models/instrumented.py‎
Lines changed: 5 additions & 0 deletions
@@ -420,10 +420,15 @@ def _record_metrics():
                         return
 
                     self.instrumentation_settings.handle_messages(messages, response, system, span)
+                    try:
+                        cost_attributes = {'operation.cost': float(response.price().total_price)}
+                    except LookupError:
+                        cost_attributes = {}
                     span.set_attributes(
                         {
                             **response.usage.opentelemetry_attributes(),
                             'gen_ai.response.model': response_model,
+                            **cost_attributes,
                         }
                     )
                     span.update_name(f'{operation} {request_model}')
Original file line number	Diff line number	Diff line change
`@@ -420,10 +420,15 @@ def _record_metrics():`
`420`	`420`	`return`
`421`	`421`
`422`	`422`	`self.instrumentation_settings.handle_messages(messages, response, system, span)`
	`423`	`+ try:`
	`424`	`+ cost_attributes = {'operation.cost': float(response.price().total_price)}`
	`425`	`+ except LookupError:`
	`426`	`+ cost_attributes = {}`
`423`	`427`	`span.set_attributes(`
`424`	`428`	`{`
`425`	`429`	`**response.usage.opentelemetry_attributes(),`
`426`	`430`	`'gen_ai.response.model': response_model,`
	`431`	`+ **cost_attributes,`
`427`	`432`	`}`
`428`	`433`	`)`
`429`	`434`	`span.update_name(f'{operation} {request_model}')`