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ERNIE 4.5 21B-A3B Thinking

Baidu

Catalogue only Open weights

Last reviewed:

Sovereignty and hosting

Catalogue only

This model is catalogued for reference. It is not hosted on LLM EU yet, and no first-party endpoint serves it here. Requests to it go to the provider directly, under that provider's own terms.

Summary

ERNIE 4.5 21B-A3B Thinking is an open-weight language model from Baidu with 21.8B parameters, published under Apache-2.0. It takes text and returns text. The published configuration records no context window, so this card carries none. The checkpoint is instruction-tuned and ships a chat template. The card is catalogue-only: LLM EU does not run this model. The publisher lists 2 languages, 1 of them among the languages the European Union publishes in.

Specifications

Provider
Baidu (CN)
Context window
Not verified: the provider has not documented this claim.
Parameters
21.8B
Modalities
text
License
apache-2.0 · licence
Open weights
yes
Release date
08 Sept 2025
Tasks
Reasoning, Low cost

Languages

Strong: en

Adequate: zh

Strong

  • en

Adequate

  • zh

Not verified: the provider has not documented this claim. — a language is listed as strong only where a source claims it; the card links the evidence where one exists.

When to use it

Strengths

  • open weights are published on Hugging Face and can be downloaded without a vendor agreement
  • Apache-2.0 licence, so commercial self-hosting is permitted without a separate agreement
  • the model page lists en
  • instruction-tuned checkpoint with a chat template in the repository

Limits

  • catalogue only — LLM EU does not run this model, and nothing on this card implies an LLM EU endpoint
  • no evaluation has been run by LLM EU
  • the published configuration records no context window, so the card carries none
  • at 21.8B parameters, self-hosting needs a single accelerator with enough memory for the weights