diff --git a/pydantic_ai_slim/pydantic_ai/models/__init__.py b/pydantic_ai_slim/pydantic_ai/models/__init__.py
index f24f836d03..a57ed1bb16 100644
--- a/pydantic_ai_slim/pydantic_ai/models/__init__.py
+++ b/pydantic_ai_slim/pydantic_ai/models/__init__.py
@@ -679,6 +679,10 @@ def infer_model(model: Model | KnownModelName | str) -> Model:  # noqa: C901
         from .openai import OpenAIModel
 
         return OpenAIModel(model_name, provider=provider)
+    elif provider == 'openai-responses':
+        from .openai import OpenAIResponsesModel
+
+        return OpenAIResponsesModel(model_name, provider='openai')
     elif provider in ('google-gla', 'google-vertex'):
         from .google import GoogleModel
 
diff --git a/tests/models/test_model.py b/tests/models/test_model.py
index e203d067ea..1f781d7d9f 100644
--- a/tests/models/test_model.py
+++ b/tests/models/test_model.py
@@ -96,6 +96,14 @@
         'grok',
         'OpenAIModel',
     ),
+    (
+        'OPENAI_API_KEY',
+        'openai-responses:gpt-4o',
+        'gpt-4o',
+        'openai',
+        'openai',
+        'OpenAIResponsesModel',
+    ),
 ]