diff --git a/examples/open_deep_research/run.py b/examples/open_deep_research/run.py
index 61c10d3..2dcddab 100644
--- a/examples/open_deep_research/run.py
+++ b/examples/open_deep_research/run.py
@@ -63,7 +63,6 @@ def parse_args():
         "question", type=str, help="for example: 'How many studio albums did Mercedes Sosa release before 2007?'"
     )
     parser.add_argument("--model-id", type=str, default="o1")
-    parser.add_argument("--api-base", type=str, default=None)
     return parser.parse_args()
 
 
diff --git a/examples/open_deep_research/run_gaia.py b/examples/open_deep_research/run_gaia.py
index c32f475..fa59fc0 100644
--- a/examples/open_deep_research/run_gaia.py
+++ b/examples/open_deep_research/run_gaia.py
@@ -75,7 +75,6 @@ def parse_args():
     parser = argparse.ArgumentParser()
     parser.add_argument("--concurrency", type=int, default=8)
     parser.add_argument("--model-id", type=str, default="o1")
-    parser.add_argument("--api-base", type=str, default=None)
     parser.add_argument("--run-name", type=str, required=True)
     return parser.parse_args()