Model family

Trinity

Family overview — summarizes releases; licenses and availability belong to each release.

Maintained by Arcee AI1

Trinity is Arcee AI's family of sparse mixture-of-experts language models: Trinity Nano (6B total, about 1B active parameters), Trinity Mini (26B total, 3B active), and Trinity Large (about 398B total, 13B active). Trinity Large is published as base, pre-anneal base, preview, and reasoning-tuned Thinking checkpoints.1 3 4

Website: Trinity overview (external site: arcee.ai)
Model hub: Arcee AI on Hugging Face (external site: huggingface.co)
Paper: Arcee Trinity Large Technical Report (external site: arxiv.org)

Last reviewedSep 29, 2026Entry updated Sep 29, 2026Documented release Dec 1, 2025

Releases assessed

Each release is assessed on its own. This family has no family-wide openness label.

Releases in the Trinity family
Release	Weights	Tier (USASI rubric v0.1)	License	Released
Trinity Mini	Weights: Public	Model-disclosure tier (USASI rubric v0.1): Open-weight	OpenMDW License Agreement, version 1.1	Dec 1, 2025
Trinity-Large-Thinking	Weights: Public	Model-disclosure tier (USASI rubric v0.1): Open-weight	OpenMDW License Agreement, version 1.1	Apr 1, 2026

What it is useful for

Arcee positions Nano for edge and on-device use and Mini for cloud or on-premises deployment, and lists the Large models as offered through its cloud API, with Trinity-Large-Thinking aimed at tool-calling and multi-step agent workflows.1 4

Organization context

Arcee AI

U.S. eligibility

Project eligibility rests on documented governing or maintaining entities, not on contributors.

Eligible · basis: U.S. headquarters

Developed and published by Arcee AI, Inc., a U.S. company with a documented San Francisco base (see the arcee-ai record). Arcee describes Trinity as trained end to end in the United States by an American company.2 1

Assessed Sep 29, 2026

Sources

1.
Trinity Models (external site: arcee.ai)
Arcee AI · Official page · accessed Sep 29, 2026
2.
The Trinity Manifesto (external site: arcee.ai)
Arcee AI · Announcement · published Dec 1, 2025 · accessed Sep 29, 2026
3.
Arcee Trinity Large Technical Report (external site: arxiv.org)
arXiv · Paper · published Feb 19, 2026 · accessed Sep 29, 2026
4.
arcee-ai/Trinity-Large-Thinking model card (external site: huggingface.co)
Arcee AI · Model card · accessed Sep 29, 2026

Report a correction Edit this entry

This listing is not an endorsement, a safety assessment, or a federal approval.

Releases assessed

What it is useful for

Organization context

U.S. eligibility

Sources

Support Us