Model release

INTELLECT-3.1

INTELLECT-3.1 is an open-weight model release in the INTELLECT family from Prime Intellect1, version INTELLECT-3.1. Its weights can be downloaded by the public1 2 under the MIT License1.

A 106B-parameter mixture-of-experts reasoning model (12B active) that continues the training of INTELLECT-3 with additional reinforcement learning on math, coding, software-engineering, and agentic tasks, using prime-rl and environments built with the verifiers library.1

On AI on Hugging Face: PrimeIntellect/INTELLECT-3.1

Last reviewedSep 29, 2026Entry updated Sep 29, 2026Documented release Unknown

Availability and license

Overall availability

Public

Weights download from Hugging Face without an access gate.1 2

Availability fact review: not separately recorded

Availability is separate from permission: read the license before using or redistributing.

MIT License (external site: huggingface.co)1
Applies to: Weights · SPDX MIT · on the rubric’s OSI-approved software-license list · fact-level rights review not recorded
Plain-language guide to the MIT License
Apache License 2.0 (prime-rl) (external site: raw.githubusercontent.com)5
Applies to: Code · SPDX Apache-2.0 · on the rubric’s OSI-approved software-license list · fact-level rights review not recorded
Plain-language guide to the Apache License 2.0
MIT License (verifiers) (external site: raw.githubusercontent.com)6
Applies to: Code · SPDX MIT · on the rubric’s OSI-approved software-license list · fact-level rights review not recorded
Plain-language guide to the MIT License

The MIT license for the weights is declared in the model card metadata; the repository has no separate LICENSE file. The card says the model, training frameworks, and environments are released under MIT and Apache 2.0 licenses.1 3

Component reuse rights

A readable or downloadable component is not automatically reusable. These indicators concern recorded license evidence, not system certification.

weights: Unknown — no complete fact-level rights review
code: Unknown — no complete fact-level rights review
data: Unknown — no complete fact-level rights review
documentation: Unknown — no complete fact-level rights review

No complete system-rights review is recorded for this release.

Model-disclosure tier

Computed from the checklist below using USASI rubric v0.2. An editorial category, not a certification.

Open-weight

The model parameters for this release can be downloaded by the public. License terms may still restrict use, redistribution, or commercial use.

How tiers are computed

Public materials checklist

Items for a model under USASI rubric v0.2. Unknown means unassessed or insufficient evidence.

Public materials checklist for INTELLECT-3.1
Item	Status	Notes and evidence
WeightsCan the general public download the model parameters for this release?	Public	BF16 safetensors in an ungated Hugging Face repository.1 2
Inference codeIs code for running the model published?	Public	The model card gives a vLLM serving command with the qwen3_coder tool-call parser and deepseek_r1 reasoning parser.1
Training codeIs the code used to train the model published?	Partial	The card says training was done with prime-rl (Apache 2.0) and verifiers environments (MIT), both open source. This covers Prime Intellect's training only, not the pretraining of the GLM-4.5-Air base.1 5 6
Training-data informationDoes the information cover provenance, scope, acquisition, selection, labeling, processing, and where data or alternatives can be obtained? Access alone does not establish completeness.	Unknown	Not assessed.
Training-data accessCan the training data be obtained? This is independent of information completeness and reuse rights; original unshareable data need not be downloadable.	Unknown	Not assessed.
Complete training pipelineIs the complete base-training and preprocessing pipeline published, including configuration? Fine-tuning code or an inference SDK alone is insufficient.	Unknown	Not assessed.
Legacy data assessment (v0.1)Historical assessment combining download access and disclosure. Preserved for traceability; excluded from the v0.2 tier calculation. See the new separate assessments above.	Partial	The card names the task areas of the added RL (math, coding, software engineering, agentic tasks) and says all training and evaluation environments are on the Environments Hub, but does not list which environments or datasets were used for 3.1. The INTELLECT-3 data it builds on is described in the INTELLECT-3 report.1 4
Training recipeAre the training configuration and procedure documented in enough detail to follow?	Partial	The card describes 3.1 only as continued RL from INTELLECT-3 and refers to the INTELLECT-3 technical report, which documents the INTELLECT-3 post-training; settings for the additional 3.1 RL are not given.1 4
Evaluation materialsPublic = evaluation code or prompts that let others re-run the evaluations are published. Partial = results only.	Unknown	The INTELLECT-3.1 model card does not report evaluation results, and no separate 3.1 evaluation report was found.

What it is useful for

The model card presents it as an update of INTELLECT-3 aimed at math, coding, software-engineering, and agentic tasks.1

Run and use notes

Documented facts only. No hardware or performance claims are made without a cited source and stated assumptions.

The model card states that the model can be served with vLLM on 2x H200 GPUs with tensor parallel size 2; Hugging Face metadata shows the published weights are stored in BF16.1 2

Organization context

Prime Intellect

Provenance and derivatives

Continued training of Prime Intellect's INTELLECT-3, which was itself post-trained from GLM-4.5-Air-Base, a base model released by Z.ai (zai-org). The base model is not a catalog member and is not treated as U.S.-developed.1 7

Derived from: INTELLECT-3 — Same organization; starting checkpoint.
Derived from: GLM-4.5-Air-Base (Z.ai) (external site: huggingface.co) — Third-party base model underlying INTELLECT-3; not a catalog member.

Other releases in the INTELLECT family

INTELLECT-3Model-disclosure tier (USASI rubric v0.2): Open-weight

INTELLECT family overview

What this catalog does not know

Unknown means the sources reviewed for this record do not document it. It is not evidence that something does not exist.

Release date: not documented in the sources reviewed.
Training-data information: unknown.
Training-data access: unknown.
Complete training pipeline: unknown.
Evaluation materials: unknown.

Have a primary source? How to report a correction.

U.S. eligibility

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

Eligible · basis: U.S. headquarters

Trained and published by Prime Intellect, Inc., a Delaware corporation with U.S. locations (see the prime-intellect record). Eligibility covers Prime Intellect's training only; the underlying GLM-4.5-Air-Base model was released by Z.ai and is not treated as a U.S.-developed model.1 8 7

Assessed Sep 29, 2026

Sources

1.
PrimeIntellect/INTELLECT-3.1 model card (external site: huggingface.co)
Prime Intellect · Model card · accessed Sep 29, 2026
2.
PrimeIntellect/INTELLECT-3.1 repository metadata (Hugging Face API) (external site: huggingface.co)
Hugging Face · Repository · accessed Sep 29, 2026
3.
INTELLECT-3.1 repository file listing (external site: huggingface.co)
Hugging Face · Repository · accessed Sep 29, 2026
4.
INTELLECT-3: Technical Report (PDF) (external site: storage.googleapis.com)
Prime Intellect · Paper · accessed Sep 29, 2026
5.
prime-rl LICENSE (Apache 2.0) (external site: raw.githubusercontent.com)
Prime Intellect · License · accessed Sep 29, 2026
6.
verifiers LICENSE (MIT) (external site: raw.githubusercontent.com)
Prime Intellect · License · accessed Sep 29, 2026
7.
zai-org/GLM-4.5-Air-Base model card (external site: huggingface.co)
Z.ai · Model card · accessed Sep 29, 2026
8.
Prime Intellect, Inc. Form D (accession 0001231919-26-000720) (external site: sec.gov)
U.S. Securities and Exchange Commission · Filing · published Jul 1, 2026 · accessed Sep 29, 2026

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

Cite this page

APA style

USASI. (2026, September 29). INTELLECT-3.1. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/open/intellect-3-1/

BibTeX

@misc{usasi_intellect_3_1,
  author = {{USASI}},
  title = {INTELLECT-3.1},
  year = {2026},
  month = sep,
  howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/open/intellect-3-1/}},
  note = {United States of America Superintelligence. Last updated 2026-09-29}
}

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