It is an in-house closed weight model for their own chat platform, mentioned in Section 5 of the original paper: https://arxiv.org/pdf/2509.17765 https://arxiv.

It is an in-house closed weight model for their own chat platform, mentioned in Section 5 of the original paper: https://arxiv.org/pdf/2509.17765 https://arxiv.org/pdf/2509.17765 I've seen it in their online materials too but can't seem to find it now.