Baidu's ERNIE team released ERNIE 5.5 Flash Preview, the first post-training version built on its previously launched Base model. The model features 280B total parameters with 14B activated parameters and supports a 1M context window, delivering strong performance in coding, 3D modeling, knowledge work, and content creation while maintaining fast decoding speeds. The API is now live on Baidu's Qianfan platform, with open-source weights scheduled for release before November 25. Baidu noted the model remains an intermediate post-training version, acknowledging potential capability gaps from incomplete training that will be addressed in the upcoming official release.