feat: add Sonnet 5 to Claude provider catalog

src/cliproxy/model-catalog.ts

@@ -367,8 +367,22 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
   claude: {
     provider: 'claude',
     displayName: 'Claude (Anthropic)',
-    defaultModel: 'claude-sonnet-4-6',
+    defaultModel: 'claude-sonnet-5',
     models: [
+      {
+        id: 'claude-sonnet-5',
+        name: 'Claude Sonnet 5',
+        description: 'Latest Sonnet model',
+        nativeImageInput: true,
+        // Sonnet 5 uses adaptive thinking; manual budget_tokens is rejected with 400.
+        thinking: {
+          type: 'levels',
+          levels: ['low', 'medium', 'high', 'xhigh', 'max'],
+          maxLevel: 'max',
+          dynamicAllowed: true,
+        },
+        extendedContext: true,
+      },
       {
         id: 'claude-fable-5',
         name: 'Claude Fable 5',