Today, PyThaiNLP use perceptron tagger. It still give the best score from Blackboard treebank Test set (https://pythainlp.github.io/Model-Cards/Part%20of%20speech/#blackboard-perceptron) but most people want to use with transformers.
I think It is good if Part-of-speech tagging use transformers model.
List Model:
- huggingface.co/airesearch/wangchanberta-base-att-spm-uncased
Docs: https://huggingface.co/learn/nlp-course/chapter7/2?fw=tf
List corpus: