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Baidu releases ERNIE 5.5 Flash Base, a 280B-parameter open-source MoE base model

Baidu published ERNIE 5.5 Flash Base on Hugging Face on November 5: a 280B sparse mixture-of-experts base model with 14B active parameters, pre-trained on 33.5 trillion tokens and released without any mid- or post-training.

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Timeline · 5 reports

  1. 2026-11-06 23:59 · DEV Community — AI
    Baidu's ERNIE-5.5-Flash-Base: can you self-host a 280B open model, and who is allowed to?
  2. 2026-11-06 18:50 · DEV Community — Machine Learning
    How to Run ERNIE 5.5 Flash Base Locally (8 H100s or 2 B300s, and It Won't Chat)
  3. 2026-11-05 21:36 · r/machinelearningnews
    Baidu releases ERNIE 5.5 Flash Base, a 280B MoE base checkpoint with 14B active params (78.4 MMLU-Pro, self-reported)
  4. 2026-11-05 21:33 · MarkTechPost
    Baidu Releases ERNIE 5.5 Flash Base: A 280B MoE Base Model With 14B Active Parameters
  5. 2026-11-05 17:56 · The Decoder
    Baidu releases ERNIE 5.5 Flash Base with 280 billion parameters as an open-source foundation model

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