Ernie 4.5 (documentation: https://github.com/PaddlePaddle/ERNIE) is a language model developed by Baidu in several versions from 0.3 B to 424 B of parameters, the latter version integrating reasoning features.

Most of these versions are testable on Hugging Face: https://huggingface.co/baidu/spaces, including a version with documents and one with web search.

Free, open-source and unlimited.