Stanford s1-32B

Stanford · 2025 · Reasoning LLM · USA

A to Z

A · App: No
B · Built By: Stanford
C · CEO & Politics: N/A (academic research) — No public partisan activity documented
D · Date: 2025
E · Expertise: Intermediate+
F · Free Tier: Yes
G · Generates: Text only
H · Deployment: Cloud + Local (open weights)
I · Inputs: Text
J · Jurisdiction: USA
K · Key Staffers: Niklas Muennighoff (Co-lead author), Zitong Yang (Co-lead author), Weijia Shi (Co-lead author), Xiang Lisa Li (Co-lead author), Tatsunori Hashimoto (Senior author)
L · Languages: English-primary
M · Model Type: Reasoning LLM
N · Safety Issues: None reported
O · Open Source: Yes — open weights
P · Pricing: Free (open weights, Apache 2.0)
Q · AIDb Rating: 4/10 · AIDb v2.0 (rule-based): Capability 4/10 · Currency 4/10 · Access 5/10 · Significance 4/10 → 4.15
R · What Makes It Special: Reasoning model fine-tuned from Qwen2.5-32B-Instruct on just 1,000 examples; it matches o1-preview and scales at test time via 'budget forcing'. Apache 2.0.
S · Stock / Status: University
T · Training Cutoff: [UNKNOWN]
U · Users: [UNKNOWN]
V · Voice Chat: No
W · Weights: Downloadable
X · X Handle: @StanfordAILab
Y · Year Founded: [UNKNOWN]
Z · Bottom Line: Open-weights Reasoning LLM from Stanford, released 2025.

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

“Stanford s1-32B.” AIDb — The AI Database. Verified 2026-06-11. https://theaidatabase.com/m/stanford-s1-32b.html