diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index aa30efd606..256dfeb371 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -16900,6 +16900,20 @@
         "supports_tool_choice": true,
         "supports_web_search": true
     },
+    "openrouter/x-ai/grok-4-fast:free": {
+        "input_cost_per_token": 0,
+        "litellm_provider": "openrouter",
+        "max_input_tokens": 2000000,
+        "max_output_tokens": 30000,
+        "max_tokens": 2000000,
+        "mode": "chat",
+        "output_cost_per_token": 0,
+        "source": "https://openrouter.ai/x-ai/grok-4-fast:free",
+        "supports_function_calling": true,
+        "supports_reasoning": true,
+        "supports_tool_choice": true,
+        "supports_web_search": false
+    },
     "ovhcloud/DeepSeek-R1-Distill-Llama-70B": {
         "input_cost_per_token": 6.7e-07,
         "litellm_provider": "ovhcloud",
@@ -21463,4 +21477,4 @@
         "supports_vision": true,
         "supports_web_search": true
     }
-}
\ No newline at end of file
+}
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index aa30efd606..256dfeb371 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -16900,6 +16900,20 @@
         "supports_tool_choice": true,
         "supports_web_search": true
     },
+    "openrouter/x-ai/grok-4-fast:free": {
+        "input_cost_per_token": 0,
+        "litellm_provider": "openrouter",
+        "max_input_tokens": 2000000,
+        "max_output_tokens": 30000,
+        "max_tokens": 2000000,
+        "mode": "chat",
+        "output_cost_per_token": 0,
+        "source": "https://openrouter.ai/x-ai/grok-4-fast:free",
+        "supports_function_calling": true,
+        "supports_reasoning": true,
+        "supports_tool_choice": true,
+        "supports_web_search": false
+    },
     "ovhcloud/DeepSeek-R1-Distill-Llama-70B": {
         "input_cost_per_token": 6.7e-07,
         "litellm_provider": "ovhcloud",
@@ -21463,4 +21477,4 @@
         "supports_vision": true,
         "supports_web_search": true
     }
-}
\ No newline at end of file
+}