Baidu Makes its Latest ERNIE 4.5 Series Models Open Source: Now Available Globally for Open Research and Development

The Chinese AI tech brand – Baidu Inc. has now made its latest ERNIE 4.5 series models open source. These models are now made available to the global AI community, allowing users to begin open research and development with them.

Read more about the update below.

Baidu’s ERNIE 4.5 Series Models – Now Open Source

After introducing its ERNIE 4.5 series models in a non-open version back in March 2025, Baidu has now officially made it open source. A total of 10 different variants are available in the ERNIE 4.5 family, and these models are MoE (Mixture of Experts). From 47B and 3B active parameters to a largest one having 424B total parameters, and to a 0.3 dense model, all of these have been made available to the global AI community. Those of you who are interested can explore these ERNIE 4.5 open source models on Hugging Face, GitHub, and Baidu AI Studio.

Speaking more, Baidu has trained its ERNIE 4.5 series models with the PaddlePaddle deep learning framework for high performance inference, and they are now publicly accessible under the Apache 2.0 license. These ERNIE 4.5 series models are optimized for language understanding and generation, with training in textual as well as visual modalities. Also, in addition to making the ERNIE 4.5 series models open source, the development toolkits have also been made open source for users.

Just to add, the AI tech world has already seen many other companies making its AI models open source and for Baidu, the direct competition is with DeepSeek and its AI model – DeepSeek R1 (made open source early this year in 2025). Alibaba and Huawei are also competitors in China for Baidu, while in the global sphere, it is competing with American brands like OpenAI, Google, and xAI. Also, this trend of making AI models open source is said to dominate the market, and it is considered to be a great approach for the companies to gain more profit and also let the AI tech community experience their latest developments.