diff --git a/changelog/3422.fixed.md b/changelog/3422.fixed.md
new file mode 100644
index 000000000..31b1d93c9
--- /dev/null
+++ b/changelog/3422.fixed.md
@@ -0,0 +1 @@
+- Fixed a bug in `traced_llm` where the model name in opentelemetry is shown unknown even though it is defined.
diff --git a/src/pipecat/utils/tracing/service_decorators.py b/src/pipecat/utils/tracing/service_decorators.py
index 22274ae8b..5bcfbd442 100644
--- a/src/pipecat/utils/tracing/service_decorators.py
+++ b/src/pipecat/utils/tracing/service_decorators.py
@@ -483,9 +483,10 @@ def traced_llm(func: Optional[Callable] = None, *, name: Optional[str] = None) -
                             # Add all available attributes to the span
                             attribute_kwargs = {
                                 "service_name": service_class_name,
-                                "model": getattr(
-                                    self, getattr(self, "_full_model_name", "model_name"), "unknown"
-                                ),
+                                "model": getattr(self, "_full_model_name", None)
+                                or getattr(self, "model_name", None)
+                                or params.get("model")
+                                or "unknown",
                                 "stream": True,  # Most LLM services use streaming
                                 "parameters": params,
                             }