diff --git a/src/cliproxy/model-catalog.ts b/src/cliproxy/model-catalog.ts
index 9db262ac..a3f75b24 100644
--- a/src/cliproxy/model-catalog.ts
+++ b/src/cliproxy/model-catalog.ts
@@ -173,6 +173,17 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
           dynamicAllowed: false,
         },
       },
+      {
+        id: 'gpt-5.2-codex',
+        name: 'GPT-5.2 Codex',
+        description: 'Previous stable Codex model',
+        thinking: {
+          type: 'levels',
+          levels: ['medium', 'high', 'xhigh'],
+          maxLevel: 'xhigh',
+          dynamicAllowed: false,
+        },
+      },
       {
         id: 'gpt-5-mini',
         name: 'GPT-5 Mini',
diff --git a/ui/src/lib/model-catalogs.ts b/ui/src/lib/model-catalogs.ts
index 48e98035..9d31f3bb 100644
--- a/ui/src/lib/model-catalogs.ts
+++ b/ui/src/lib/model-catalogs.ts
@@ -146,6 +146,17 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
           haiku: 'gpt-5-mini',
         },
       },
+      {
+        id: 'gpt-5.2-codex',
+        name: 'GPT-5.2 Codex',
+        description: 'Previous stable Codex model',
+        presetMapping: {
+          default: 'gpt-5.2-codex',
+          opus: 'gpt-5.2-codex',
+          sonnet: 'gpt-5.2-codex',
+          haiku: 'gpt-5-mini',
+        },
+      },
       {
         id: 'gpt-5-mini',
         name: 'GPT-5 Mini',