Baidu releases the ERNIE 5.5 Flash Preview

Background

The preview is built on ERNIE 5.5 Flash Base, and it is the first post-trained model built on that base ^[1].

What happened

Baidu released the ERNIE 5.5 Flash Preview on 11 November 2026, according to its release page ^[1]. Baidu calls the release an intermediate post-training checkpoint and says some capabilities may still lag ^[1].

Key details

Baidu says the preview targets coding, 3D modeling, knowledge work and content creation ^[1]. It has 280B total parameters with 14B active, and a 1M-token context window ^[1].

Impact

The API is offered through Baidu Qianfan. Open weights are promised under Apache 2.0, a widely used open-source license, but they were not yet posted at release ^[1].