diff --git a/ui/CHANGELOG.md b/ui/CHANGELOG.md
index 4e17efd6b8..66594f5f9a 100644
--- a/ui/CHANGELOG.md
+++ b/ui/CHANGELOG.md
@@ -3,6 +3,12 @@
 All notable changes to the **Prowler UI** are documented in this file.
 
 
+## [1.12.4] (Prowler v5.12.4)
+
+### 🐞 Fixed
+
+- Remove maxTokens model param for GPT-5 models [(#8843)](https://github.com/prowler-cloud/prowler/pull/8843)
+
 ## [1.12.3] (Prowler v5.12.3)
 
 ### 🐞 Fixed
diff --git a/ui/lib/lighthouse/utils.ts b/ui/lib/lighthouse/utils.ts
index 78f760c8c7..c6ec19d9f4 100644
--- a/ui/lib/lighthouse/utils.ts
+++ b/ui/lib/lighthouse/utils.ts
@@ -60,7 +60,8 @@ export const getModelParams = (config: any): ModelParams => {
 
   if (modelId.startsWith("gpt-5")) {
     params.temperature = undefined;
-    params.reasoningEffort = "minimal";
+    params.reasoningEffort = "minimal" as const;
+    params.maxTokens = undefined;
   }
 
   return params;