GPT (Generative Pre-trained Transformer) is a state-of-the-art language processing model developed by OpenAI. However, as of now, GPT-3, the latest version of the model, is not available for free usage. OpenAI offers GPT-3 under a commercial license, and access to it is provided through the OpenAI API, which requires a paid subscription. Limited access to GPT-3 through OpenAI’s playground is also available, but it is subject to certain usage restrictions and may not be entirely free. You can refer to the OpenAI website for more details on pricing and access to GPT-3.
GPT（Generative Pre-trained Transformer）是一个基于Transformer模型的人工智能语言模型。GPT的免费版本是指OpenAI发布的GPT-2模型，它在某种程度上是一个免费版本的GPT。GPT-2是一个被广泛应用于自然语言生成任务的模型，可以生成文章、对话、代码等等。OpenAI已经发布了GPT-2的预训练模型，并提供了免费的API来使用这个模型。
然而，需要注意的是GPT-2的免费版有一些限制。OpenAI放出的免费API有使用限制，包括每分钟的请求次数和生成的文本长度上限。此外，GPT-2的免费版本也没有公开其完整的训练数据，所以可能对特定领域的问题效果较差。