Baidu open-sources ERNIE 5.5 Flash Base: 280B MoE with 14B active, 33.5T tokens, 1M context

teortaxesTex · x · 2026-11-06

Baidu's Sun Tianxiang announced ERNIE 5.5 Flash Base, his first release since joining the company: an open-sourced 280B MoE with only 14B active parameters, pretrained on 33.5T tokens, strong on reasoning/coding/long-context benchmarks, and supporting up to 1M context. Commentary highlights the LatentMoE design — multiple sigmoid routers addressing the mismatch between router scores and true expert usefulness without extra activated experts or communication overhead, plus a learnable per-expert scalar in Stable LatentMoE across 43 layers. Post-training is underway.

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