diff --git a/templates/chapter_polish.yml b/templates/chapter_polish.yml
index 6b57f8f..fb64ed4 100644
--- a/templates/chapter_polish.yml
+++ b/templates/chapter_polish.yml
@@ -2,7 +2,7 @@ name: chapter_polish
 description: >
   Iris polishes the chapter using the editorial consensus from the review roundtable.
 debug: true
-model: x-ai/grok-4
+model: openai/gpt-5.4
 system: agent_prompt
 
 skills: