diff --git a/packages/core/src/providers/openai-responses/OpenAIResponsesProvider.ts b/packages/core/src/providers/openai-responses/OpenAIResponsesProvider.ts
index d004fbcbe..7f3dd6bf1 100644
--- a/packages/core/src/providers/openai-responses/OpenAIResponsesProvider.ts
+++ b/packages/core/src/providers/openai-responses/OpenAIResponsesProvider.ts
@@ -206,7 +206,7 @@ export class OpenAIResponsesProvider extends BaseProvider {
       return RESPONSES_API_MODELS.map((modelId) => ({
         id: modelId,
         name: modelId,
-        provider: 'openai-responses',
+        provider: this.name,
         supportedToolFormats: ['openai'],
       }));
     }
@@ -242,7 +242,7 @@ export class OpenAIResponsesProvider extends BaseProvider {
             models.push({
               id: model.id,
               name: model.id,
-              provider: 'openai-responses',
+              provider: this.name,
               supportedToolFormats: ['openai'],
             });
           }
@@ -253,7 +253,7 @@ export class OpenAIResponsesProvider extends BaseProvider {
           : RESPONSES_API_MODELS.map((modelId) => ({
               id: modelId,
               name: modelId,
-              provider: 'openai-responses',
+              provider: this.name,
               supportedToolFormats: ['openai'],
             }));
       }
@@ -265,7 +265,7 @@ export class OpenAIResponsesProvider extends BaseProvider {
     return RESPONSES_API_MODELS.map((modelId) => ({
       id: modelId,
       name: modelId,
-      provider: 'openai-responses',
+      provider: this.name,
       supportedToolFormats: ['openai'],
     }));
   }
diff --git a/packages/core/src/providers/openai-responses/__tests__/OpenAIResponsesProvider.models.test.ts b/packages/core/src/providers/openai-responses/__tests__/OpenAIResponsesProvider.models.test.ts
index 68ff19fa7..abaeaa8fb 100644
--- a/packages/core/src/providers/openai-responses/__tests__/OpenAIResponsesProvider.models.test.ts
+++ b/packages/core/src/providers/openai-responses/__tests__/OpenAIResponsesProvider.models.test.ts
@@ -139,4 +139,24 @@ describe('OpenAIResponsesProvider - Codex Model Listing', () => {
       expect(gpt51?.name).toBe('gpt-5.1');
     });
   });
+
+  it('should use this.name for provider field so aliases work correctly', async () => {
+    const provider = new OpenAIResponsesProvider(
+      undefined,
+      'https://api.openai.com/v1',
+    );
+
+    Object.defineProperty(provider, 'name', {
+      value: 'my-alias',
+      writable: false,
+      enumerable: true,
+      configurable: true,
+    });
+
+    const models = await provider.getModels();
+
+    for (const model of models) {
+      expect(model.provider).toBe('my-alias');
+    }
+  });
 });