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Each item is one event, written from several sources, with a footnote for every fact.

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Release

StepFun releases Step 5 Preview

In September 2026 StepFun released Step 5 Preview as its new flagship foundation model. It is a sparse MoE with 600 billion total parameters, supports up to 1 million tokens of context, and is offered through the StepFun Open Platform API.

Release

Baidu releases ERNIE 5.1

Baidu released ERNIE 5.1 on 9 May 2026, a model derived from ERNIE 5.0's pre-training with about a third of its total parameters and much lower training cost, after a preview build topped Chinese models on LMArena.