diff --git a/src/providers/models.json b/src/providers/models.json
index d50fc49f..b592ff1e 100644
--- a/src/providers/models.json
+++ b/src/providers/models.json
@@ -44,7 +44,8 @@
         "gpt-5.4-mini",
         "gpt-5.4-nano",
         "gpt-5.3-codex",
-        "gpt-5.1-codex-max"
+        "gpt-5.1-codex-max",
+        { "id": "openai/gpt-5.3-codex-spark", "displayName": "gpt-5.3-codex-spark", "contextWindow": 12800, "reasoningEffort": "xhigh" }
       ]
     },
     "llmgateway": {