diff --git a/src/cai/sdk/agents/run.py b/src/cai/sdk/agents/run.py
index e2379560..103661e0 100644
--- a/src/cai/sdk/agents/run.py
+++ b/src/cai/sdk/agents/run.py
@@ -4,7 +4,6 @@ import asyncio
 import copy
 from dataclasses import dataclass, field
 from typing import Any, cast
-import os
 
 from openai.types.responses import ResponseCompletedEvent