diff --git a/litellm/litellm_core_utils/prompt_templates/common_utils.py b/litellm/litellm_core_utils/prompt_templates/common_utils.py
index 9ba547b36009..a99883ef7b62 100644
--- a/litellm/litellm_core_utils/prompt_templates/common_utils.py
+++ b/litellm/litellm_core_utils/prompt_templates/common_utils.py
@@ -18,6 +18,7 @@
     cast,
 )
 
+from litellm.router_utils.batch_utils import InMemoryFile
 from litellm.types.llms.openai import (
     AllMessageValues,
     ChatCompletionAssistantMessage,
@@ -453,6 +454,10 @@ def extract_file_data(file_data: FileTypes) -> ExtractedFileData:
             filename, file_content, content_type = file_data
         elif len(file_data) == 4:
             filename, file_content, content_type, file_headers = file_data
+    elif isinstance(file_data, InMemoryFile):
+        filename = file_data.name
+        file_content = file_data
+        content_type = file_data.content_type
     else:
         file_content = file_data
     # Convert content to bytes
diff --git a/litellm/router_utils/batch_utils.py b/litellm/router_utils/batch_utils.py
index 6617ad1f68ed..6c5d80afc1ba 100644
--- a/litellm/router_utils/batch_utils.py
+++ b/litellm/router_utils/batch_utils.py
@@ -7,9 +7,10 @@
 
 
 class InMemoryFile(io.BytesIO):
-    def __init__(self, content: bytes, name: str):
+    def __init__(self, content: bytes, name: str, content_type: str = "application/jsonl"):
         super().__init__(content)
         self.name = name
+        self.content_type = content_type
 
 
 def should_replace_model_in_jsonl(
@@ -63,7 +64,7 @@ def replace_model_in_jsonl(file_content: FileTypes, new_model_name: str) -> File
 
         # Reassemble the modified lines and return as bytes
         modified_file_content = "\n".join(modified_lines).encode("utf-8")
-        return InMemoryFile(modified_file_content, name="modified_file.jsonl")  # type: ignore
+        return InMemoryFile(modified_file_content, name="modified_file.jsonl", content_type="application/jsonl")  # type: ignore
 
     except (json.JSONDecodeError, UnicodeDecodeError, TypeError):
         # return the original file content if there is an error replacing the model name
diff --git a/tests/router_unit_tests/test_router_batch_utils.py b/tests/router_unit_tests/test_router_batch_utils.py
index 94cd6e001e4c..adbab7ce881b 100644
--- a/tests/router_unit_tests/test_router_batch_utils.py
+++ b/tests/router_unit_tests/test_router_batch_utils.py
@@ -18,7 +18,7 @@
 from typing import Dict, List
 from litellm.router_utils.batch_utils import (
     replace_model_in_jsonl,
-    _get_router_metadata_variable_name,
+    _get_router_metadata_variable_name, InMemoryFile,
 )
 
 
@@ -57,6 +57,9 @@ def test_bytes_input(sample_jsonl_bytes):
     result = replace_model_in_jsonl(sample_jsonl_bytes, new_model)
 
     assert result is not None
+    assert isinstance(result, InMemoryFile)
+    assert result.name == "modified_file.jsonl"
+    assert result.content_type == "application/jsonl"
 
 
 def test_tuple_input(sample_jsonl_bytes):
@@ -66,6 +69,9 @@ def test_tuple_input(sample_jsonl_bytes):
     result = replace_model_in_jsonl(test_tuple, new_model)
 
     assert result is not None
+    assert isinstance(result, InMemoryFile)
+    assert result.name == "modified_file.jsonl"
+    assert result.content_type == "application/jsonl"
 
 
 def test_file_like_object(sample_file_like):
@@ -74,6 +80,9 @@ def test_file_like_object(sample_file_like):
     result = replace_model_in_jsonl(sample_file_like, new_model)
 
     assert result is not None
+    assert isinstance(result, InMemoryFile)
+    assert result.name == "modified_file.jsonl"
+    assert result.content_type == "application/jsonl"
 
 
 def test_router_metadata_variable_name():