Lab release history
Last updated Aug 22, 2024
AI21 Labs model releases
Pioneer of hybrid Mamba-Transformer (Jamba) architectures. This page collects the lab's model releases, lifecycle events, source links, and model metadata in one crawlable record.
4
Models
1
Labs
2
Open
4
Recent
4 models
Jamba 1.5 Large
AvailableAI21 LabsOpen weights
Israel's AI21 hybrid Mamba-Transformer MoE, with a 256k context and strong long-document throughput.
Type
Hybrid
Params
398B
Context
256K
Top eval
—
Released
Aug 22, 2024
1.8y ago
Hybrid398B256K ctxAug 22, 2024
Jamba
AvailableAI21 LabsOpen weights
First Jamba hybrid Transformer-Mamba MoE model with open weights and a 256K context length.
Type
Hybrid
Params
52B
Context
256K
Top eval
—
Released
Mar 28, 2024
2.2y ago
Hybrid52B256K ctxMar 28, 2024
Jurassic-2 Ultra
DeprecatedAI21 LabsProprietary
Second-generation Jurassic model with better multilingual support, lower latency, and instruction following.
Type
—
Params
Undisc.
Context
—
Top eval
—
Released
Mar 9, 2023
3.3y ago
—Undisc.— ctxMar 9, 2023
Jurassic-1 Jumbo
RetiredAI21 LabsProprietary
AI21's first major API language model, launched through AI21 Studio.
Type
Dense
Params
178B
Context
—
Top eval
—
Released
Aug 11, 2021
4.9y ago
Dense178B— ctxAug 11, 2021