@@ -13,6 +13,7 @@ from ml_model.exceptions import (
     NSFWDetectedException,
     RealPersonDetectedError,
     RequestBlocked,
+    PromptLengthExceeded,
 )
 from poller.models import Proxy
 
@@ -206,6 +207,9 @@ class BytedanceModelArkAdapter:
                 timeout=600,
             ) as client:
                 resp = client.post(cls.CONTENT_TYPE_TO_ENDPOINT[BytedanceContentType.CHAT], json=payload)
+                if resp.status_code == 413:
+                    logger.error('Payload too large: %s', resp.text)
+                    raise PromptLengthExceeded(max_length=202752)
                 if resp.status_code >= 400:
                     logger.error(
                         'Bytedance request failed status=%s route=%s body=%s',
@@ -213,6 +217,7 @@ class BytedanceModelArkAdapter:
                         cls.CONTENT_TYPE_TO_ENDPOINT[BytedanceContentType.CHAT],
                         resp.text,
                     )
+                    raise GenerationException
                 try:
                     data: BytedanceChatResponse = resp.json()
                 except Exception as exc: