$gptSdkClient = new GptSdkApiClient(
    HttpClient::create(),
    'myapikey'
);
$promptRun = $gptSdkClient->runPrompt(
    new PromptRun(
        promptKey: 'hello_prompt',
        params: new ArrayCollection(
            [
                new PromptParam(
                    type: Type::STRING,
                    key: 'tone',
                    value: 'angry'
                )
            ]
        ),
    )
);

echo $promptRun->getResponse();