# Is there a pre-trained QIIME 2 classifier with full-length 16S (.qza)?

**URL:** https://forum.qiime2.org/t/is-there-a-pre-trained-qiime-2-classifier-with-full-length-16s-qza/33564
**Category:** Ideas and Suggestions
**Tags:** feature-classifier
**Created:** [August 11, 2025, 3:13pm UTC](https://forum.qiime2.org/t/is-there-a-pre-trained-qiime-2-classifier-with-full-length-16s-qza/33564 "2025-08-11T15:13:05Z")
**Posts on this page:** 1
**Showing post:** 14

<div class="post-metadata">

### Author: ![SoilRotifer](https://forum.qiime2.org/user_avatar/forum.qiime2.org/soilrotifer/32/21071_2.png) [@SoilRotifer](https://forum.qiime2.org/u/SoilRotifer)
#### Post date: [August 13, 2025, 6:18pm UTC](https://forum.qiime2.org/t/is-there-a-pre-trained-qiime-2-classifier-with-full-length-16s-qza/33564/14 "2025-08-13T18:18:05Z")

</div>

> [@Scarleth\_Bravo](#):
>
> So here I am, with my coffee (and a good dose of patience), waiting for it to finish.

🤣 Hahaha, I totally understand! Cheers! ☕

Yeah, I consensus vsearch can use a lot of resources.

I often try to find a small computer with a fast processor with ~32-64 GB RAM to train my classifiers. I am able to train a full SILVA DB on my M1 Max Macbook Pro in less than a few hours. The HPC that I have access too, has very slow and old CPUs... thus, it usually takes a couple days for that to perform the same task. ☹

Have you tried the [GTDB database](https://forum.qiime2.org/t/how-to-train-a-gtdb-ssu-classifier-using-rescript/25725)? You can use RESCRIPt to download the `226` version and see how that performs.

-Cheers!

---

_[View the full topic](https://forum.qiime2.org/t/is-there-a-pre-trained-qiime-2-classifier-with-full-length-16s-qza/33564)._