diff --git a/src/services/OpenAiGptService.js b/src/services/OpenAiGptService.js
index 296f306..ea7fa2e 100644
--- a/src/services/OpenAiGptService.js
+++ b/src/services/OpenAiGptService.js
@@ -8,7 +8,7 @@ export default class OpenAiGptService {
 
   static async call(prompt, model, requestJsonOutput = true) {
     if (model == "gpt3") model = "gpt-3.5-turbo";
-    if (model == "gpt4") model = "gpt-4-turbo-preview";
+    if (model == "gpt4") model = "gpt-4o";
 
     const configuration = new Configuration({
       apiKey: process.env.OPENAI_API_KEY
diff --git a/test/OpenAiGptService.test.js b/test/OpenAiGptService.test.js
index 25f2314..ec990b7 100644
--- a/test/OpenAiGptService.test.js
+++ b/test/OpenAiGptService.test.js
@@ -104,7 +104,7 @@ describe('OpenAiGptService', () => {
     const prompt = 'What is the capital of France?';
     const expectedResult = 'The capital of France is Paris.';
     const models = ['gpt3', 'gpt4'];
-    const expectedModels = ['gpt-3.5-turbo', 'gpt-4-turbo-preview'];
+    const expectedModels = ['gpt-3.5-turbo', 'gpt-4o'];
 
     const openaiStub = sinon.stub(OpenAIApi.prototype, 'createChatCompletion').resolves({
       data: {