Index-Translate-35B-A3B

Index-Translate-35B-A3B-preview is a mixture-of-experts translation model from Bilibili's Index team, released in early October 2026. With 35B total and 3B active parameters, it covers 150 text languages under Apache 2.0, with weights free on Hugging Face and ModelScope. The shipped configuration supports a 262K-token context. Dense 2B and 9B siblings cover the laptop-to-server range, making it a full family rather than a single checkpoint — a notable example of a non-AI company open-sourcing a serious capability model.

The honest picture: it is a translation specialist, not a general chat or reasoning model — don't evaluate it as one. Bilibili is not a model vendor, so long-term maintenance, safety evaluations, and support are less certain than with dedicated labs, and quality on low-resource language pairs is unverified outside the team's own claims.