diff --git a/src/constants.py b/src/constants.py
index 5fb452b..15195c7 100644
--- a/src/constants.py
+++ b/src/constants.py
@@ -69,7 +69,10 @@ async def chat_endpoint(): ...
 # Models supported by Claude Agent SDK (as of November 2025)
 # NOTE: Claude Agent SDK only supports Claude 4+ models, not Claude 3.x
 CLAUDE_MODELS = [
-    # Claude 4.5 Family (Latest - Fall 2025) - RECOMMENDED
+    # Claude 4.6 Family (Latest) - RECOMMENDED
+    "claude-opus-4-6",      # Most capable
+    "claude-sonnet-4-6",    # Recommended - best coding model
+    # Claude 4.5 Family (Fall 2025)
     "claude-opus-4-5-20250929",  # Latest Opus 4.5 - Most capable
     "claude-sonnet-4-5-20250929",  # Recommended - best coding model
     "claude-haiku-4-5-20251001",  # Fast & cheap
@@ -88,7 +91,7 @@ async def chat_endpoint(): ...
 
 # Default model (recommended for most use cases)
 # Can be overridden via DEFAULT_MODEL environment variable
-DEFAULT_MODEL = os.getenv("DEFAULT_MODEL", "claude-sonnet-4-5-20250929")
+DEFAULT_MODEL = os.getenv("DEFAULT_MODEL", "claude-sonnet-4-6")
 
 # Fast model (for speed/cost optimization)
 FAST_MODEL = "claude-haiku-4-5-20251001"