Baidu Releases ERNIE 5.5 Flash Preview, Open Weights Due Before Nov. 25

Baidu has released ERNIE 5.5 Flash Preview, a post-trained model built on ERNIE-5.5-Flash-Base, with an API available on Qianfan and open-source weights planned before Nov. 25.

The model has 280 billion total parameters, including 14 billion active parameters, and supports context windows of up to one million tokens.

Baidu described the model as performing strongly in coding, 3D modeling, knowledge work and content creation. It also scored competitively across multiple benchmarks while maintaining fast decoding.

Baidu characterized Preview as an intermediate stage, with post-training still underway. The company said some capabilities may remain incomplete and that improvements are expected in a subsequent official version.