diff --git a/aider/resources/model-metadata.json b/aider/resources/model-metadata.json
index 7a46d2b25..42fb51851 100644
--- a/aider/resources/model-metadata.json
+++ b/aider/resources/model-metadata.json
@@ -506,6 +506,15 @@
         "supports_tool_choice": true,
         "source": "https://cloud.google.com/vertex-ai/generative-ai/pricing"
     },
+    "openrouter/x-ai/grok-3-beta": {
+        "max_tokens": 131072,
+        "max_input_tokens": 131072,
+        "max_output_tokens": 131072,
+        "input_cost_per_token": 0.000003,
+        "output_cost_per_token": 0.000015,
+        "litellm_provider": "openrouter",
+        "mode": "chat"
+    },
     "openrouter/google/gemini-2.0-flash-exp:free": {
         "max_tokens": 8192,
         "max_input_tokens": 1048576,