adding provider check

Author: mattbrandman

pydantic_ai_slim/pydantic_ai/models/anthropic.py

@@ -459,7 +459,7 @@ def _get_container(
         if (container := model_settings.get('anthropic_container')) is not None:
             return None if container is False else container
         for m in reversed(messages):
-            if isinstance(m, ModelResponse) and m.provider_details:
+            if isinstance(m, ModelResponse) and m.provider_name == self.system and m.provider_details:
                 if cid := m.provider_details.get('container_id'):
                     return BetaContainerParams(id=cid)
         return None

tests/models/test_anthropic.py

@@ -7887,6 +7887,7 @@ async def test_anthropic_container_from_message_history(allow_model_requests: No
         ModelRequest(parts=[UserPromptPart(content='hello')]),
         ModelResponse(
             parts=[TextPart(content='world')],
+            provider_name='anthropic',
             provider_details={'container_id': 'container_from_history'},
         ),
     ]
@@ -7910,6 +7911,7 @@ async def test_anthropic_container_setting_false_ignores_history(allow_model_req
         ModelRequest(parts=[UserPromptPart(content='hello')]),
         ModelResponse(
             parts=[TextPart(content='world')],
+            provider_name='anthropic',
             provider_details={'container_id': 'container_should_be_ignored'},
         ),
     ]