Tulu-3-405B

Allen AI · 2025 · LLM · USA

A to Z

A · App: No
B · Built By: Allen AI
C · CEO & Politics: Ali Farhadi — Centrist / academic
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: Nathan Lambert (Lead author), Hannaneh Hajishirzi (Senior 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, Llama license)
Q · AIDb Rating: [UNKNOWN]
R · What Makes It Special: Ai2's Tülu 3 405B: Llama 3.1 405B post-trained with Ai2's fully open Tülu 3 recipe (supervised fine-tuning, DPO, then reinforcement learning with verifiable rewards), with its data, code and evaluation tools released; on Ai2's benchmark average it scored 80.7, above Llama 3.1 405B Instruct (79.0) and DeepSeek V3 (75.9) and below GPT-4o (81.6). Primarily English.
S · Stock / Status: Non-profit
T · Training Cutoff: [UNKNOWN]
U · Users: [UNKNOWN]
V · Voice Chat: No
W · Weights: Downloadable
X · X Handle: @allen_ai
Y · Year Founded: [UNKNOWN]
Z · Bottom Line: Open-weights LLM from Allen AI, released 2025.

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

“Tulu-3-405B.” AIDb — The AI Database. Verified 2026-05-12. https://theaidatabase.com/m/tulu-3-405b.html