diff --git a/api/core/model_runtime/model_providers/openai_api_compatible/llm/llm.py b/api/core/model_runtime/model_providers/openai_api_compatible/llm/llm.py
index 2b729d4293..6279125f46 100644
--- a/api/core/model_runtime/model_providers/openai_api_compatible/llm/llm.py
+++ b/api/core/model_runtime/model_providers/openai_api_compatible/llm/llm.py
@@ -150,9 +150,9 @@ class OAIAPICompatLargeLanguageModel(_CommonOAI_API_Compat, LargeLanguageModel):
             except json.JSONDecodeError as e:
                 raise CredentialsValidateFailedError('Credentials validation failed: JSON decode error')
 
-            if (completion_type is LLMMode.CHAT and json_result['object'] == ''):
+            if (completion_type is LLMMode.CHAT and json_result.get('object','') == ''):
                 json_result['object'] = 'chat.completion'
-            elif (completion_type is LLMMode.COMPLETION and json_result['object'] == ''):
+            elif (completion_type is LLMMode.COMPLETION and json_result.get('object','') == ''):
                 json_result['object'] = 'text_completion'
 
             if (completion_type is LLMMode.CHAT