diff --git a/VERSION b/VERSION
index eea29b8..41fe9f3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.10.8.4
+2.10.9
diff --git a/src/providers/openai/codex-core.js b/src/providers/openai/codex-core.js
index 82e5cb9..5bf42ea 100644
--- a/src/providers/openai/codex-core.js
+++ b/src/providers/openai/codex-core.js
@@ -380,7 +380,7 @@ export class CodexApiService {
             service_tier: cleanedBody.service_tier || defaultServiceTier,
             reasoning: {
                 ...cleanedBody.reasoning,
-                effort: cleanedBody.reasoning?.effort || defaultReasoningEffort
+                effort: isFastModel ? defaultReasoningEffort : cleanedBody.reasoning?.effort
             },
             stream,
             prompt_cache_key: cache.id