diff --git a/core/src/commonMain/kotlin/com/xebia/functional/xef/llm/assistants/Assistant.kt b/core/src/commonMain/kotlin/com/xebia/functional/xef/llm/assistants/Assistant.kt
index 0c6ae72f4..c42d7f247 100644
--- a/core/src/commonMain/kotlin/com/xebia/functional/xef/llm/assistants/Assistant.kt
+++ b/core/src/commonMain/kotlin/com/xebia/functional/xef/llm/assistants/Assistant.kt
@@ -176,6 +176,7 @@ class Assistant(
 
         assistant.modify(
           ModifyAssistantRequest(
+            model = assistantRequest.model,
             name = assistantRequest.name,
             description = assistantRequest.description,
             instructions = assistantRequest.instructions,