OpenAI CEO Sam Altman hinted that the company's next big model, GPT-5, is not likely to be released this year.During a Reddit Ask Me Anything (AMA) session, Altman used ChatGPT, OpenAI's generative AI chatbot, to answer some of the questions.The company is facing challenges in allocating computing resources towards multiple ideas and making hard decisions.Despite recent executive departures, Altman recently secured a historic $6.6 billion fundraising round for OpenAI.