diff --git a/src/models.json b/src/models.json
index 33a6884..512277a 100644
--- a/src/models.json
+++ b/src/models.json
@@ -139,6 +139,42 @@
       "max_output_tokens": 128000
     }
   },
+  {
+    "id": "gpt-5.1-codex-max-medium",
+    "handle": "openai/gpt-5.1-codex-max",
+    "label": "GPT-5.1-Codex (max-medium)",
+    "description": "GPT-5.1-Codex with maximum capabilities enabled",
+    "updateArgs": {
+      "reasoning_effort": "medium",
+      "verbosity": "medium",
+      "context_window": 272000,
+      "max_output_tokens": 128000
+    }
+  },
+  {
+    "id": "gpt-5.1-codex-max-high",
+    "handle": "openai/gpt-5.1-codex-max",
+    "label": "GPT-5.1-Codex (max-high)",
+    "description": "GPT-5.1-Codex with maximum capabilities enabled",
+    "updateArgs": {
+      "reasoning_effort": "high",
+      "verbosity": "medium",
+      "context_window": 272000,
+      "max_output_tokens": 128000
+    }
+  },
+  {
+    "id": "gpt-5.1-codex-max-x-high",
+    "handle": "openai/gpt-5.1-codex-max",
+    "label": "GPT-5.1-Codex (max-x-high)",
+    "description": "GPT-5.1-Codex with maximum capabilities enabled",
+    "updateArgs": {
+      "reasoning_effort": "xhigh",
+      "verbosity": "medium",
+      "context_window": 272000,
+      "max_output_tokens": 128000
+    }
+  },
   {
     "id": "gpt-5-minimal",
     "handle": "openai/gpt-5",