diff --git a/models.py b/models.py
index ef6cfbc..b617131 100644
--- a/models.py
+++ b/models.py
@@ -6,7 +6,7 @@ from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_openai import ChatOpenAI
 
 # Model IDs — single source of truth. Bump here when families ship new revs.
-CLAUDE_SONNET = "claude-sonnet-4-20250514"
+CLAUDE_SONNET = "claude-sonnet-4-6"
 CLAUDE_HAIKU = "claude-haiku-4-5-20251001"
 OPENAI_CROSS_REVIEWER = "gpt-4.1"
 GEMINI_SCANNER = "gemini-2.5-pro"