diff --git a/internal/providers/configs/openai.json b/internal/providers/configs/openai.json
index 7519d9aa8b11b6fbcf6ed7647ee8b5b2550e8442..05086a9ff160030d1969cb1ce3769abb3b7ef1e3 100644
--- a/internal/providers/configs/openai.json
+++ b/internal/providers/configs/openai.json
@@ -49,6 +49,20 @@
       "default_reasoning_effort": "medium",
       "supports_attachments": true
     },
+    {
+      "id": "gpt-5.1-codex-max",
+      "name": "GPT-5.1 Codex Max",
+      "cost_per_1m_in": 1.25,
+      "cost_per_1m_out": 10,
+      "cost_per_1m_in_cached": 0.125,
+      "cost_per_1m_out_cached": 0.125,
+      "context_window": 400000,
+      "default_max_tokens": 128000,
+      "can_reason": true,
+      "reasoning_levels": ["minimal", "low", "medium", "high"],
+      "default_reasoning_effort": "medium",
+      "supports_attachments": true
+    },
     {
       "id": "gpt-5.1-codex-mini",
       "name": "GPT-5.1 Codex Mini",