diff --git a/litellm/llms/bedrock/batches/handler.py b/litellm/llms/bedrock/batches/handler.py
index c071f331337..8c100a85a71 100644
--- a/litellm/llms/bedrock/batches/handler.py
+++ b/litellm/llms/bedrock/batches/handler.py
@@ -267,10 +267,16 @@ class BedrockBatchesHandler:
         response = client.get_model_invocation_job(jobIdentifier=batch_id)
 
         if logging_obj is not None:
+            # boto3 returns native datetime objects for time fields
+            # (submitTime, endTime, …) and in ResponseMetadata. The
+            # logging post_call path calls json.dumps() on dict responses,
+            # which chokes on datetime — so we serialize with default=str.
+            import json as _json
+
             logging_obj.post_call(
                 input=batch_id,
                 api_key="",
-                original_response=response,
+                original_response=_json.dumps(response, default=str),
                 additional_args={"complete_input_dict": {"jobIdentifier": batch_id}},
             )
 
diff --git a/tests/test_litellm/llms/bedrock/batches/test_handler.py b/tests/test_litellm/llms/bedrock/batches/test_handler.py
index 18780ccce0f..1b795349548 100644
--- a/tests/test_litellm/llms/bedrock/batches/test_handler.py
+++ b/tests/test_litellm/llms/bedrock/batches/test_handler.py
@@ -300,7 +300,11 @@ def test_logging_obj_pre_and_post_call_invoked(patched_boto3):
 
     post_kwargs = logging_obj.post_call.call_args.kwargs
     assert post_kwargs["input"] == JOB_ARN
-    assert post_kwargs["original_response"]["jobArn"] == JOB_ARN
+    # original_response is JSON-serialized (str) because boto3 returns
+    # datetime objects that json.dumps() cannot handle natively.
+    import json
+    parsed = json.loads(post_kwargs["original_response"])
+    assert parsed["jobArn"] == JOB_ARN
 
 
 def test_missing_boto3_raises_helpful_import_error():