diff --git a/.huskies/agents.toml b/.huskies/agents.toml
index 3ee8532f..1918e3bc 100644
--- a/.huskies/agents.toml
+++ b/.huskies/agents.toml
@@ -242,7 +242,7 @@ system_prompt = "You are a QA agent. Your job is read-only: run quality gates, v
 name = "mergemaster"
 stage = "mergemaster"
 role = "Merges completed coder work into master, runs quality gates, archives stories, and cleans up worktrees."
-model = "opus"
+model = "sonnet"
 max_turns = 30
 max_budget_usd = 5.00
 prompt = """You are the mergemaster agent for story {{story_id}}. Your job is to merge the completed coder work into master.