Context Window
256K tokens
Parameters
398B (MoE)
Source
Open
Modality
Text
Jamba 2 is AI21’s hybrid Mamba-Transformer architecture model, offering long-context efficiency with strong reasoning.
Specifications
Technical details
Developer
AI21 Labs
Model Family
Jamba
Parameters
398B (MoE)
Context Window
256,000 tokens (256K)
Modality
Text
Open Source
Yes
License
Jamba Open Model License
API Available
Yes
Release Date
August 1, 2025
Pricing
$2/$8 per M tokens