Jamba 1.5

AI21 Labs · 2024 · LLM · Israel

A to Z

A · App: No
B · Built By: AI21 Labs
C · CEO & Politics: Ori Goshen and Yoav Shoham (co-CEOs) — Centrist (Israel-based)
D · Date: 2024
E · Expertise: Intermediate+
F · Free Tier: Yes
G · Generates: Text only
H · Deployment: Cloud + Local (open weights)
I · Inputs: Text
J · Jurisdiction: Israel
K · Key Staffers: Ori Goshen (Co-CEO), Yoav Shoham (Co-CEO), Amnon Shashua (Chairman)
L · Languages: English-primary
M · Model Type: LLM
N · Safety Issues: None reported
O · Open Source: Yes — open weights
P · Pricing: Free (open weights, Jamba Open Model License)
Q · AIDb Rating: [UNKNOWN]
R · What Makes It Special: AI21 Labs' Jamba 1.5, instruction-tuned open models built on the Jamba hybrid Transformer-Mamba mixture-of-experts architecture for high throughput and low memory use: Jamba 1.5 Large (94B active, about 399B total parameters) and Jamba 1.5 Mini (12B active), both with an effective 256K-token context, the longest among open-weight models at release; ExpertsInt8 quantization fits Large on eight 80GB GPUs at full context. Jamba Open Model License.
S · Stock / Status: Private
T · Training Cutoff: [UNKNOWN]
U · Users: [UNKNOWN]
V · Voice Chat: No
W · Weights: Downloadable
X · X Handle: @AI21Labs
Y · Year Founded: [UNKNOWN]
Z · Bottom Line: Open-weights LLM from AI21 Labs, released 2024.

Data completeness 85% · Last verified 2026-05-12 · Primary source ↗

“Jamba 1.5.” AIDb — The AI Database. Verified 2026-05-12. https://theaidatabase.com/m/jamba-15.html