diff --git a/libs/langchain_v1/langchain/agents/middleware/__init__.py b/libs/langchain_v1/langchain/agents/middleware/__init__.py
index 8a8e22e44e..1b0c50bb8d 100644
--- a/libs/langchain_v1/langchain/agents/middleware/__init__.py
+++ b/libs/langchain_v1/langchain/agents/middleware/__init__.py
@@ -20,6 +20,7 @@ from .types import (
     AgentMiddleware,
     AgentState,
     ModelRequest,
+    ModelResponse,
     after_agent,
     after_model,
     before_agent,
@@ -41,6 +42,7 @@ __all__ = [
     "ModelCallLimitMiddleware",
     "ModelFallbackMiddleware",
     "ModelRequest",
+    "ModelResponse",
     "PIIDetectionError",
     "PIIMiddleware",
     "PlanningMiddleware",