Yes, there is a possibility of a GPT-4 in the future. OpenAI has been consistently updating and improving its language models, so it is likely that they will continue to develop and release newer versions. However, whether GPT-4 will be released or not depends on various factors such as technological advancements, market demand, and OpenAI's strategic goals. As the field of natural language processing and AI continues to evolve, it is plausible for OpenAI to introduce an even more advanced and capable language model.