# Is there a pretrainer classifer for silva 138.1 specifically for 515-806 V4 sequences available on this website?

**URL:** https://forum.qiime2.org/t/is-there-a-pretrainer-classifer-for-silva-138-1-specifically-for-515-806-v4-sequences-available-on-this-website/28617
**Category:** Silva
**Tags:** taxonomy, silva
**Created:** [December 14, 2023, 10:07pm UTC](https://forum.qiime2.org/t/is-there-a-pretrainer-classifer-for-silva-138-1-specifically-for-515-806-v4-sequences-available-on-this-website/28617 "2023-12-14T22:07:45Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![Estewart](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/e/58956e/32.png) [@Estewart](https://forum.qiime2.org/u/Estewart)
#### Post date: [December 14, 2023, 10:07pm UTC](https://forum.qiime2.org/t/is-there-a-pretrainer-classifer-for-silva-138-1-specifically-for-515-806-v4-sequences-available-on-this-website/28617/1 "2023-12-14T22:07:45Z")

</div>

I have been using the pretrained classifier available on this website called "silva-138-99-515-806-nb-classifier.qza" but noticed silva released a 138.1 version in 2020. Is there a pretrainer classifier available for this version yet? Or will there be at some point?

---

<div class="post-metadata">

### Author: ![Nicholas\_Bokulich](https://forum.qiime2.org/user_avatar/forum.qiime2.org/nicholas_bokulich/32/19937_2.png) [@Nicholas\_Bokulich](https://forum.qiime2.org/u/Nicholas_Bokulich)
#### Post date: [December 15, 2023, 2:11pm UTC](https://forum.qiime2.org/t/is-there-a-pretrainer-classifer-for-silva-138-1-specifically-for-515-806-v4-sequences-available-on-this-website/28617/5 "2023-12-15T14:11:03Z")

</div>

Hi @Estewart ,

For the time being, I recommend using RESCRIPt to build a 138.1 classifier on your own. This is what we use to build the pre-trained classifiers, and 138.1 is the current default when using the `get-silva-data` action in that plugin. You can follow this tutorial:

> [@Processing, filtering, and evaluating the SILVA database (and other reference sequence data) with RESCRIPt](https://forum.qiime2.org/t/processing-filtering-and-evaluating-the-silva-database-and-other-reference-sequence-data-with-rescript/15494):
>
> construction Please consider this tutorial a living document, which may change based upon community feedback and ongoing plugin development. RESCRIPt [RESCRIPt](https://github.com/bokulich-lab/RESCRIPt) (REference Sequence annotation and CuRatIon Pipeline) is a python package and QIIME 2 plugin for formatting, managing, and manipulating sequence reference databases. This package was designed for compiling, manipulating, and evaluating sequence reference databases from SILVA, NCBI, Greengenes, GTDB, and other sources, and for construc…

The pre-trained classifiers will be updated to use 138.1 at some point in a future QIIME 2 release.

Good luck!