Model · Language model

ERNIE 4.5 21B A3B

Baidu's June 30, 2025 open release of ERNIE 4.5 as a 21B-total, 3B-active mixture-of-experts text checkpoint with 131K context and tool calling, published under Apache 2.0 with safetensors weights on Baidu's Hugging Face organization alongside a technical report. No developer API or managed host is documented for this exact checkpoint. Reviewed by automation under ADR 055 with human spot-checks; verify against the cited evidence.

Developer

Baidu

Distribution

Downloadable weights

Artifact licensing

Open-licensed artifacts

License scope

Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.

Licenses

Apache License 2.0

Boundary

This record represents the ERNIE-4.5-21B-A3B-PT post-trained checkpoint of the ERNIE 4.5 family. The Base-PT and Thinking variants, the 0.3B, 30B, 300B, and 424B siblings, the VL multimodal variants, the Qianfan ernie-4.5-turbo API models, and the ERNIE Bot product are separate boundaries.

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