gpt-4

Olá Rodrigo, estou com esse erro:
Exception in thread "main" com.theokanning.openai.OpenAiHttpException: The model `gpt-4` does not exist or you do not have access to it. Learn more: https://help.openai.com/en/articles/7102672-how-can-i-access-gpt-4.
at com.theokanning.openai.service.OpenAiService.execute(OpenAiService.java:522)
at com.theokanning.openai.service.OpenAiService.createChatCompletion(OpenAiService.java:148)
at apilibrary.msapilibraryopenai.TestaIntegracao.main(TestaIntegracao.java:31)

Caused by: retrofit2.adapter.rxjava2.HttpException: HTTP 404 at retrofit2.adapter.rxjava2.BodyObservable$BodyObserver.onNext(BodyObservable.java:57) at retrofit2.adapter.rxjava2.BodyObservable$BodyObserver.onNext(BodyObservable.java:38) at retrofit2.adapter.rxjava2.CallExecuteObservable.subscribeActual(CallExecuteObservable.java:48) at io.reactivex.Observable.subscribe(Observable.java:10151) at retrofit2.adapter.rxjava2.BodyObservable.subscribeActual(BodyObservable.java:35) at io.reactivex.Observable.subscribe(Observable.java:10151) at io.reactivex.internal.operators.observable.ObservableSingleSingle.subscribeActual(ObservableSingleSingle.java:35) at io.reactivex.Single.subscribe(Single.java:2517) at io.reactivex.Single.blockingGet(Single.java:2001) at com.theokanning.openai.service.OpenAiService.execute(OpenAiService.java:513) ... 2 more

segue o código:
public static void main(String[] args) {

    var user = "Gere 5 produtos";
    var system = "Você é um gerador de produtos ficticios para um ecommerce e deve gerar apenas o nome dos produtos";

    var chave = System.getenv("OPENAI_API_KEY");

    var service = new OpenAiService(chave);

    var completionRequest = ChatCompletionRequest
            .builder()
            .model("gpt-4")
            .messages(Arrays.asList(
                    new ChatMessage(ChatMessageRole.USER.value(), user),
                    new ChatMessage(ChatMessageRole.SYSTEM.value(), system)
            ))
            .build();

    service
            .createChatCompletion(completionRequest)
            .getChoices()
            .forEach(c -> System.out.println(c.getMessage().getContent()));

}