diff --git a/litellm/integrations/otel/model/payloads.py b/litellm/integrations/otel/model/payloads.py
index 5bca8e01aec..91343c551e1 100644
--- a/litellm/integrations/otel/model/payloads.py
+++ b/litellm/integrations/otel/model/payloads.py
@@ -815,6 +815,7 @@ def _output_choices(response: Mapping[str, object]) -> tuple[Mapping[str, object
         or _search_choices(response)
         or _image_choices(response)
         or _binary_choices(response)
+        or _passthrough_choices(response)
     )
 
 
@@ -924,6 +925,13 @@ def _image_location(item: Mapping[str, object]) -> str | None:
     return f"b64_json image ({len(encoded) * 3 // 4 - encoded[-2:].count('=')} bytes)"
 
 
+def _passthrough_choices(response: Mapping[str, object]) -> tuple[_Choice, ...]:
+    body: Final = response.get("response")
+    mapping: Final = as_str_mapping(body)
+    text: Final = json.dumps(dict(mapping)) if mapping is not None else as_str(body)
+    return (_text_choice(text),) if text else ()
+
+
 def _binary_choices(response: Mapping[str, object]) -> tuple[_Choice, ...]:
     size: Final = as_int(response.get("num_bytes"))
     if size is None:
diff --git a/tests/unit/integrations/otel/test_otel_v2_vendor_mappers.py b/tests/unit/integrations/otel/test_otel_v2_vendor_mappers.py
index ca7a9b424ad..a8938678858 100644
--- a/tests/unit/integrations/otel/test_otel_v2_vendor_mappers.py
+++ b/tests/unit/integrations/otel/test_otel_v2_vendor_mappers.py
@@ -702,6 +702,8 @@ def test_langfuse_mapper_renders_an_ocr_call_with_the_page_markdown_as_output():
         ("amoderation", {"results": [{"flagged": True, "categories": {"violence": True}}]}, "flagged: violence"),
         ("aimage_generation", {"data": [{"b64_json": "QUJDRA=="}]}, "b64_json image (4 bytes)"),
         ("aspeech", {"object": "binary", "content_type": "audio/mpeg", "num_bytes": 9}, "audio/mpeg (9 bytes)"),
+        ("pass_through_endpoint", {"response": '{"answers": {"q": 0.9}}'}, '{"answers": {"q": 0.9}}'),
+        ("pass_through_endpoint", {"response": {"answers": {"q": 0.9}}}, '{"answers": {"q": 0.9}}'),
     ],
 )
 def test_langfuse_mapper_renders_every_non_chat_route_output_as_an_assistant_message(