diff --git a/model_prices_and_context_window.json b/model_prices_and_context_window.json
index b02ae7b587f..ddc04e47aed 100644
--- a/model_prices_and_context_window.json
+++ b/model_prices_and_context_window.json
@@ -16543,6 +16543,20 @@
         "max_tokens": 8191,
         "mode": "embedding"
     },
+    "chatgpt/gpt-5.3-codex": {
+        "litellm_provider": "chatgpt",
+        "max_input_tokens": 128000,
+        "max_output_tokens": 128000,
+        "max_tokens": 128000,
+        "mode": "responses",
+        "supported_endpoints": [
+            "/v1/responses"
+        ],
+        "supports_function_calling": true,
+        "supports_parallel_function_calling": true,
+        "supports_response_schema": true,
+        "supports_vision": true
+    },
     "chatgpt/gpt-5.2-codex": {
         "litellm_provider": "chatgpt",
         "max_input_tokens": 128000,