GPT-NeoX

EleutherAI · 2022 · LLM · USA

A to Z

A · App: Yes
B · Built By: EleutherAI
C · CEO & Politics: Community-led (no CEO) — N/A (open-source community)
D · Date: 2022
E · Expertise: Beginner (app available)
F · Free Tier: Yes
G · Generates: Text only
H · Deployment: Cloud + Local (open weights)
I · Inputs: Text
J · Jurisdiction: USA
K · Key Staffers: Sid Black (Lead author), Stella Biderman (Lead author), Eric Hallahan (Lead author)
L · Languages: English-primary
M · Model Type: LLM
N · Safety Issues: None reported
O · Open Source: Yes — open weights
P · Pricing: Free (open weights, Apache 2.0)
Q · AIDb Rating: 5/10 · AIDb v2.0 (rule-based): Capability 4/10 · Currency 4/10 · Access 10/10 · Significance 4/10 → 4.90
R · What Makes It Special: EleutherAI's 20B-parameter autoregressive language model (GPT-NeoX-20B), trained on the Pile; at release, the largest dense model with publicly available weights. Open weights (Apache 2.0).
S · Stock / Status: Non-profit
T · Training Cutoff: [UNKNOWN]
U · Users: [UNKNOWN]
V · Voice Chat: No
W · Weights: Downloadable
X · X Handle: @AiEleuther
Y · Year Founded: [UNKNOWN]
Z · Bottom Line: Open-weights LLM from EleutherAI, released 2022.

Data completeness 88% · Last verified 2026-06-11 · Primary source ↗

“GPT-NeoX.” AIDb — The AI Database. Verified 2026-06-11. https://theaidatabase.com/m/gpt-neox-eleutherai.html