GitHub Repo
Nanbeige4.2-3B Compresses an Agent Model With a Looped Transformer, Supporting a 256K Context With 3B Non-Embedding Parameters
Nanbeige Lab has released Nanbeige4.2-3B, pretrained from scratch on 28 trillion tokens. It repeatedly applies the same set of Transformer layers to increase computational depth without adding parameters. In official agent benchmarks, it generally outperforms the larger Qwen3.5-9B, but the results depend heavily on Nanbeige's own execution framework and still require independent reproduction.