# Baidu open-sources ERNIE 5.5 Flash Base, a 280B MoE base model

> Original title: 百度开源文心5.5 Flash Base，多基准测试刷新同尺寸模型 SOTA

- Source: QbitAI
- Published: 2026-11-05T07:15:13.000Z
- Bad Influence: https://badinfluence.news/items/howkfykr9uegmp8xdk4pdaya2
- Original: https://www.qbitai.com/2026/11/507787.html

## Summary

Baidu says it has open-sourced ERNIE 5.5 Flash Base, a MoE base model with 280B total parameters and 14B active per token. The model was pretrained on 33.5 trillion tokens with a 128K context length, extendable to 1M tokens during fine-tuning and inference. Baidu reports state-of-the-art results among same-size models across several benchmarks, ahead of DeepSeek-V4-Flash-Base, Hy3-preview-Base, and MiMo-V2.5-Base.