# ToxTransformer — Open-source molecular toxicity model

> A toxicity model you can read, run, and build on.

ToxTransformer is our in-house molecular toxicity model, open source and available today. It predicts 6,647 toxicity endpoints from structure alone, and the architecture, weights, and training code are all public — so you can see how a prediction is made, run it on your own molecules, or fine-tune it for your chemistry.

## Key facts
- **6,647** — toxicity endpoints
- **Open** — source, on GitHub
- **Today** — available now

## What ToxTransformer does

### Open source
The model is public — architecture, weights, and training code — so the field can inspect it, run it, and build on it.

### Structure to prediction
Score a molecule across 6,647 toxicity endpoints from its structure, no assay required.

### Yours to extend
Fine-tune it on your own chemistry, or wire it into a pipeline through ToxJobs — nothing is locked behind an API.

## Works closely with
- [Pleiome](https://toxindex.com/platform/pleiome.md): Generative multi-property transformer
- [ToxJobs](https://toxindex.com/platform/toxjobs.md): Prediction toolkit
- [Yard](https://toxindex.com/platform/yard.md): Raw data warehouse

## Frequently asked questions

**What is ToxTransformer?**

ToxTransformer is ToxIndex's in-house, open-source molecular toxicity model. It predicts 6,647 toxicity endpoints from chemical structure and is available today.

**Is ToxTransformer really open source?**

Yes. The architecture, weights, and training code are public at github.com/biobricks-ai/toxtransformer, so you can inspect it, run it, and extend it.

**How is ToxTransformer different from Pleiome?**

ToxTransformer is available today and open source, covering 6,647 endpoints. Pleiome is its generative successor, in development, predicting 150,000+ endpoints at once with inverse design.

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Canonical page: https://toxindex.com/platform/toxtransformer