diff --git a/libs/sdk-js/src/schema.ts b/libs/sdk-js/src/schema.ts
index 979c198ef..c2de251f6 100644
--- a/libs/sdk-js/src/schema.ts
+++ b/libs/sdk-js/src/schema.ts
@@ -10,7 +10,7 @@ type RunStatus =
   | "timeout"
   | "interrupted";
 
-type ThreadStatus = "idle" | "busy" | "interrupted";
+type ThreadStatus = "idle" | "busy" | "interrupted" | "error";
 
 type MultitaskStrategy = "reject" | "interrupt" | "rollback" | "enqueue";
 
diff --git a/libs/sdk-py/langgraph_sdk/schema.py b/libs/sdk-py/langgraph_sdk/schema.py
index 827c2e33a..3bc43f035 100644
--- a/libs/sdk-py/langgraph_sdk/schema.py
+++ b/libs/sdk-py/langgraph_sdk/schema.py
@@ -17,12 +17,13 @@ Represents the status of a run:
 - "interrupted": The run was manually stopped or interrupted.
 """
 
-ThreadStatus = Literal["idle", "busy", "interrupted"]
+ThreadStatus = Literal["idle", "busy", "interrupted", "error"]
 """
 Represents the status of a thread:
 - "idle": The thread is not currently processing any task.
 - "busy": The thread is actively processing a task.
 - "interrupted": The thread's execution was interrupted.
+- "error": An exception occurred during task processing.
 """
 
 StreamMode = Literal["values", "messages", "updates", "events", "debug", "custom"]