diff --git a/litellm/model_prices_and_context_window_backup.json b/litellm/model_prices_and_context_window_backup.json
index 7aae4e8bf53..a39017f0ab9 100644
--- a/litellm/model_prices_and_context_window_backup.json
+++ b/litellm/model_prices_and_context_window_backup.json
@@ -63653,7 +63653,7 @@
     "bedrock_mantle/us-gov-west-1/xai.grok-4.3": {
         "use_openai_responses_path": true,
         "litellm_provider": "bedrock_mantle",
-        "max_input_tokens": 131072,
+        "max_input_tokens": 1048576,
         "max_output_tokens": 16384,
         "max_tokens": 16384,
         "mode": "chat",
diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index 7aae4e8bf53..a39017f0ab9 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -63653,7 +63653,7 @@
     "bedrock_mantle/us-gov-west-1/xai.grok-4.3": {
         "use_openai_responses_path": true,
         "litellm_provider": "bedrock_mantle",
-        "max_input_tokens": 131072,
+        "max_input_tokens": 1048576,
         "max_output_tokens": 16384,
         "max_tokens": 16384,
         "mode": "chat",