Baidu releases ERNIE 5.5 Flash Base with 280 billion parameters as an open-source foundation model Matthias Bastian View the LinkedIn Profile of Matthias Bastian Nov 5, 2026 Baidu's AI development is still alive, but most of the work is on you. The Chinese company has released ERNIE-5.5-Flash-Base, an open foundation model that ships deliberately without fine-tuning or post-training. Developers are expected to decide for themselves where to take the model.