diff --git a/astrbot/core/provider/sources/openai_source.py b/astrbot/core/provider/sources/openai_source.py
index 1212e8b00..44d089805 100644
--- a/astrbot/core/provider/sources/openai_source.py
+++ b/astrbot/core/provider/sources/openai_source.py
@@ -251,10 +251,14 @@ class ProviderOpenAIOfficial(Provider):
     def _extract_usage(self, usage: CompletionUsage) -> TokenUsage:
         ptd = usage.prompt_tokens_details
         cached = ptd.cached_tokens if ptd and ptd.cached_tokens else 0
+        prompt_tokens = 0 if usage.prompt_tokens is None else usage.prompt_tokens
+        completion_tokens = (
+            0 if usage.completion_tokens is None else usage.completion_tokens
+        )
         return TokenUsage(
-            input_other=usage.prompt_tokens - cached,
-            input_cached=ptd.cached_tokens if ptd and ptd.cached_tokens else 0,
-            output=usage.completion_tokens,
+            input_other=prompt_tokens - cached,
+            input_cached=cached,
+            output=completion_tokens,
         )
 
     async def _parse_openai_completion(