Elon Musk has announced that the Grok 4.5 model, based on the 1.5T V9 f base model, has entered private testing at SpaceX and Tesla. The model, which incorporates Cursor data in its supplementary training, is reportedly performing at levels close to or exceeding the Opus model. Musk highlighted the role of reinforcement learning in enhancing the model's capabilities and mentioned ongoing iterative optimization of the Grok Build training framework. Additionally, Musk disclosed plans for SpaceX to release a new model trained from scratch on a monthly basis throughout the year, indicating a commitment to continuous innovation and development in AI technology.