How to set the frequency_penalty? about client HOT 1 CLOSED

$yourApiKey = getenv('YOUR_API_KEY');
$client = OpenAI::client($yourApiKey);

$result = $client->chat()->create([
    'model' => 'gpt-3.5-turbo',
    'messages' => [
        ['role' => 'user', 'content' => 'Hello!'],
    ],
    'frequency_penalty' => 0,
]);

echo $result->choices[0]->message->content; // Hello! How can I assist you today?