feat: support claude opus 5

src/cliproxy/model-catalog.ts

@@ -499,6 +499,23 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
         },
         extendedContext: true,
       },
+      {
+        id: 'claude-opus-5',
+        name: 'Claude Opus 5',
+        description: 'Latest premium model',
+        nativeImageInput: true,
+        // Opus 5 (released 2026-07-14) uses adaptive thinking, matching Sonnet 5
+        // and Opus 4.8: Anthropic accepts only effort levels; manual budget_tokens
+        // is rejected with 400. Proxy metadata reports zero + dynamic allowed.
+        thinking: {
+          type: 'levels',
+          levels: ['low', 'medium', 'high', 'xhigh', 'max'],
+          maxLevel: 'max',
+          zeroAllowed: true,
+          dynamicAllowed: true,
+        },
+        extendedContext: true,
+      },
       {
         id: 'claude-opus-4-8',
         name: 'Claude Opus 4.8',