Waypoint: Outpost Bio's Open Microbiome Foundation Models Overview Outpost Bio open-sourced three artefacts under Apache 2.0, described in Treloar et al., bioRxiv 2026.05.02.722381: | Artefact | What it is | Hugging Face | | --- | --- | --- | | Waypoint | GPT-2-style causal LMs over taxonomic tokens, 6M–170M params | , , | | Atlas | 539,308 microbiome samples scraped from MGnify (485,377 pretrain / 53,931 benchmark) | | | Compass | Eight downstream tasks over four studies | | The unifying idea: a microbiome sample is a sentence . Each taxon is one token, tokens are ordered by descending abund…