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This model was released on 2025-12-09 and added to Hugging Face Transformers on 2025-12-16.

Jais2

Overview

Jais2 a next-generation Arabic open-weight LLM trained on the richest Arabic-first dataset to date. Built from the ground up with 8B and 70B parameters, Jais 2 understands Arabic the way it's truly spoken across dialects, cuulutre, and modern expression. It is developed by MBZUAI, Inception and Cerebras Systems and based on the transformer architecture with modifications including:

• LayerNorm instead of RMSNorm
• ReLU² activation function
• Rotary Position Embeddings (RoPE)

Jais2Config

[[autodoc]] Jais2Config

Jais2Model

[[autodoc]] Jais2Model - forward

Jais2ForCausalLM

[[autodoc]] Jais2ForCausalLM - forward