Update README.md

README.md

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-Two versions of Orthrus are available for use via HuggingFace ([See collection](https://huggingface.co/collections/quietflamingo/orthrus-67902c204932687e24cc1c01)):
+Three versions of Orthrus are available for use via HuggingFace ([See collection](https://huggingface.co/collections/quietflamingo/orthrus-67902c204932687e24cc1c01)):
 - [**Orthrus base 4-track**](https://huggingface.co/quietflamingo/orthrus-base-4-track): Encodes the mRNA sequence with a simplified one-hot approach.
+- [**Orthrus large 4-track**](https://huggingface.co/quietflamingo/orthrus-large-4-track): Larger version of the above.
 - [**Orthrus large 6-track**](https://huggingface.co/quietflamingo/orthrus-large-6-track): Adds biological context by including splice site indicators and coding sequence markers, which is crucial for accurate mRNA property prediction such as RNA half-life, ribosome load, and exon junction detection.
 
 The model cards in the above versions contain instructions to use Orthrus directly from HuggingFace. See below for more comprehensive instructions to run Orthrus from this HF repo based on the original github repo.