diff --git a/src/cliproxy/model-catalog.ts b/src/cliproxy/model-catalog.ts
index 6c19ab7c..52ec7e62 100644
--- a/src/cliproxy/model-catalog.ts
+++ b/src/cliproxy/model-catalog.ts
@@ -295,11 +295,13 @@ export const MODEL_CATALOG: Partial<Record<CLIProxyProvider, ProviderCatalog>> =
         name: 'Claude Opus 4.7',
         description: 'Latest flagship model',
         nativeImageInput: true,
+        // Opus 4.7 only supports adaptive thinking on the Anthropic API; manual
+        // thinking.type: "enabled" with budget_tokens is rejected with 400.
+        // Expose effort levels; the proxy translates these into adaptive effort.
         thinking: {
-          type: 'budget',
-          min: 1024,
-          max: 128000,
-          zeroAllowed: false,
+          type: 'levels',
+          levels: ['low', 'medium', 'high', 'xhigh'],
+          maxLevel: 'xhigh',
           dynamicAllowed: true,
         },
         extendedContext: true,
diff --git a/tests/unit/cliproxy/model-catalog.test.js b/tests/unit/cliproxy/model-catalog.test.js
index 5023bf32..4f5649b1 100644
--- a/tests/unit/cliproxy/model-catalog.test.js
+++ b/tests/unit/cliproxy/model-catalog.test.js
@@ -147,9 +147,11 @@ describe('Model Catalog', () => {
       const opus47 = MODEL_CATALOG.claude.models.find((m) => m.id === 'claude-opus-4-7');
       assert(opus47, 'Should include Claude Opus 4.7');
       assert.strictEqual(opus47.name, 'Claude Opus 4.7');
-      // Claude provider differs from AGY: zero thinking budget is disallowed,
-      // and extended (1M) context is available on the Anthropic API.
-      assert.strictEqual(opus47.thinking.zeroAllowed, false);
+      // Opus 4.7 requires adaptive thinking (type: 'levels'); manual budget_tokens
+      // is rejected by the Anthropic API with 400. Extended (1M) context is available.
+      assert.strictEqual(opus47.thinking.type, 'levels');
+      assert.deepStrictEqual(opus47.thinking.levels, ['low', 'medium', 'high', 'xhigh']);
+      assert.strictEqual(opus47.thinking.maxLevel, 'xhigh');
       assert.strictEqual(opus47.extendedContext, true);
     });