updates for model catalog compatability

Author: johnabbott72

SemanticDeveloper/SemanticDeveloper/Views/SessionView.axaml.cs

@@ -646,7 +646,8 @@ private async Task<List<ModelCatalogEntry>> FetchModelCatalogAsync()
         {
             var parameters = new JObject
             {
-                ["pageSize"] = PageSize
+                ["limit"] = PageSize,
+                ["pageSize"] = PageSize // legacy field for older Codex builds
             };
             if (!string.IsNullOrWhiteSpace(cursor))
                 parameters["cursor"] = cursor;

SemanticDeveloper/SemanticDeveloper/models.json

@@ -4,7 +4,7 @@
       "id": "gpt-5-codex",
       "model": "gpt-5-codex",
       "displayName": "gpt-5-codex",
-      "description": "Optimized for coding tasks with many tools.",
+      "description": "Optimized for codex.",
       "supportedReasoningEfforts": [
         {
           "reasoningEffort": "low",
@@ -22,6 +22,24 @@
       "defaultReasoningEffort": "medium",
       "isDefault": true
     },
+    {
+      "id": "gpt-5-codex-mini",
+      "model": "gpt-5-codex-mini",
+      "displayName": "gpt-5-codex-mini",
+      "description": "Optimized for codex. Cheaper, faster, but less capable.",
+      "supportedReasoningEfforts": [
+        {
+          "reasoningEffort": "medium",
+          "description": "Dynamically adjusts reasoning based on the task"
+        },
+        {
+          "reasoningEffort": "high",
+          "description": "Maximizes reasoning depth for complex or ambiguous problems"
+        }
+      ],
+      "defaultReasoningEffort": "medium",
+      "isDefault": false
+    },
     {
       "id": "gpt-5",
       "model": "gpt-5",