It would not surprise me if this is what has delayed OpenAI in releasing a new model. After more than a year since GPT-4, they may have by now produced some meg

It would not surprise me if this is what has delayed OpenAI in releasing a new model. After more than a year since GPT-4, they may have by now produced some mega-trained mega-model, but running it is so expensive, and its eval improvement over GPT-4 so marginal, that releasing it to the public simply makes no commercial sense just yet. They may be working on how to optimize it to reduce cost, or re-engineer it to improve evals.