diff --git a/src/backend/src/services/MeteringService/costMaps/openrouterCostMap.ts b/src/backend/src/services/MeteringService/costMaps/openrouterCostMap.ts
index ffbafcd3f..8785cf274 100644
--- a/src/backend/src/services/MeteringService/costMaps/openrouterCostMap.ts
+++ b/src/backend/src/services/MeteringService/costMaps/openrouterCostMap.ts
@@ -134,6 +134,15 @@ export const OPENROUTER_COST_MAP = {
     'openrouter:openai/gpt-5.1:completion': 1000,
     'openrouter:openai/gpt-5.1:web_search': 1000000,
     'openrouter:openai/gpt-5.1:input_cache_read': 12,
+    'openrouter:openai/gpt-5.1-codex:prompt': 125,
+    'openrouter:openai/gpt-5.1-codex:completion': 1000,
+    'openrouter:openai/gpt-5.1-codex:input_cache_read': 12,
+    'openrouter:openai/gpt-5.1-codex-mini:prompt': 25,
+    'openrouter:openai/gpt-5.1-codex-mini:completion': 200,
+    'openrouter:openai/gpt-5.1-codex-mini:input_cache_read': 3,
+    'openrouter:openai/gpt-5.1-chat-latest:prompt': 125,
+    'openrouter:openai/gpt-5.1-chat-latest:completion': 1000,
+    'openrouter:openai/gpt-5.1-chat-latest:input_cache_read': 12,
     'openrouter:openai/gpt-5:prompt': 125,
     'openrouter:openai/gpt-5:completion': 1000,
     'openrouter:openai/gpt-5:web_search': 1000000,