diff --git a/router/router.py b/router/router.py
index 80b9f69..bfd8d7a 100644
--- a/router/router.py
+++ b/router/router.py
@@ -190,8 +190,8 @@ def route(rd, tier):
     
     # TIER 3: Heavy reasoning — extremely large context or very long conversations
     if t > 50000 or turns > 25:
-        # Prefer models with larger context windows (MoE/VLM at 131K, Dense at 65K)
-        candidates = [m for m in ["qwen3.6-35B-A3B","qwen3.5-9b-vlm","qwen3.6-27B-code"] if m in avail]
+        # Dense first (98K, purpose-built for reasoning), then MoE/VLM 131K
+        candidates = [m for m in ["qwen3.6-27B-code","qwen3.6-35B-A3B","qwen3.5-9b-vlm"] if m in avail]
         result = select_best_gpu(candidates, "heavy_reasoning")
         if result: return result