Models based on UiPath Helix

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When using document understanding, there are multiple predefined models available. There seems to be no base model of UiPath Helix when creating a document understanding project.

Are the predefined models based on UiPath Helix ?

What is the best method currently available to have better accuracy in extracting certain details from pdf/image document? Do I need to train on my data like invoices to get best result, or UiPath Helix being an LLM has been trained on huge dataset already.

This link suggests almost all the models are based on UiPath Helix , but does not explicitly lists them:

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@Sumit_kumar4

UiPath Helix cannot be trained by use it is pretrained model as you understood

And few existing models are being trained on top using UiPath Helix ..those are the endpoints and details that are mentioned in the link you shared as well

Cheers