OpenAI is reportedly preparing to launch a limited preview of GPT-4.5, an upgraded version of its language model. References to GPT-4.5 have been found in the code for ChatGPT's Team Plan, suggesting that the new model may be introduced soon. Additionally, there is speculation that OpenAI may release 'Sora', a text-to-video model, as part of its '12 Days of OpenAI' event, during which the company is expected to announce new features and updates.