Soofi S releases a 30B-A3B open Mamba-MoE model trained on 27T tokens
_ScottCondron · x · 2026-07-23
The post announces the Soofi S pretraining tech report, describing a 30B-A3B mixture-of-experts hybrid Mamba model trained on about 27T tokens with intentionally up-weighted German.
Key claims from the report:
- It is the strongest fully open model in the authors’ evaluations on both the English and German aggregates, ahead of Olmo 3 32B and Apertus 70B.
- The release includes unusually complete transparency: per-source data accounting, hyperparameters, training and eval code, checkpoints, and a project page.
- The project was trained on Deutsche Telekom infrastructure, and the authors even released a Weights & Biases dashboard for the run.
The post is basically celebrating how unusually open the whole training stack is, not just the model weights.
Related event: Soofi S Releases 30B Hybrid Mamba Open-Source Model(2 posts)→
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