Model release

Cogito v2 Preview Llama 405B

Cogito v2 Preview Llama 405B is an open-weight model release in the Cogito family from Deep Cogito1 4, version cogito-v2-preview-llama-405B, released Jul 31, 2025. Its weights can be downloaded by the public1 2 under the Llama 3.1 Community License Agreement1 6.

A 405B-parameter dense hybrid reasoning model that Deep Cogito post-trained from Meta's Llama 3.1 405B, released in July 2025 as one of four Cogito v2 Preview models. It can answer directly or reason first, supports a 128k-token context, and was trained in over 30 languages using Deep Cogito's Iterated Distillation and Amplification approach.1 4 5

Model hub: Model card (Hugging Face) (external site: huggingface.co)
Release notes: Cogito v2 Preview announcement (external site: deepcogito.com)
Repository: Cogito v2 and v2.1 repository (external site: github.com)

On AI on Hugging Face: deepcogito/cogito-v2-preview-llama-405B

Last reviewedSep 29, 2026Entry updated Sep 29, 2026Documented release Jul 31, 2025

Availability and license

Overall availability

Public

Weights download from Hugging Face without an access gate; use is subject to the Llama 3.1 Community License. Deep Cogito's repository also lists hosted access through OpenRouter and Together AI.1 2 5

Availability fact review: not separately recorded

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

Llama 3.1 Community License Agreement (external site: raw.githubusercontent.com)1 6
Applies to: Weights · custom license (no SPDX identifier) · fact-level rights review not recorded
Plain-language guide to the Llama 3.1 Community License Agreement

The model card's license field is "llama3.1" and its license section says the repository and weights are under the Llama 3.1 Community License Agreement. That agreement requires including it and displaying "Built with Llama" when redistributing, beginning the names of distributed derived models with "Llama", and following Meta's acceptable use policy; it requires licensees whose products had more than 700 million monthly active users in the month before the Llama 3.1 release to request a license from Meta, and ends for anyone who sues Meta or any other entity alleging that the Llama materials or outputs infringe their IP. California law governs.1 6

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.

The weights are under a license that is not on the rubric's OSI-approved list. Read its terms before 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 Cogito v2 Preview Llama 405B
Item	Status	Notes and evidence
WeightsCan the general public download the model parameters for this release?	Public	BF16 weights in an ungated Hugging Face repository.1 2
Inference codeIs code for running the model published?	Public	The model card gives Transformers examples for standard and reasoning modes and for tool calling; the repository's config declares the LlamaForCausalLM architecture.1 3
Training codeIs the code used to train the model published?	Unknown	No training code was found in the model card, announcement, or GitHub repository.
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.	Unknown	The model card and announcement do not describe the post-training data; Meta's pretraining data for the base model is not public.
Training recipeAre the training configuration and procedure documented in enough detail to follow?	Partial	The announcement describes Iterated Distillation and Amplification (distilling the results of inference-time reasoning back into the model's parameters) at a conceptual level without configurations or data details.4 1
Evaluation materialsPublic = evaluation code or prompts that let others re-run the evaluations are published. Partial = results only.	Partial	The model card shows a benchmark chart and refers to the announcement for more results; evaluation code is not linked.1 4

What it is useful for

The model card describes it as optimized for coding, STEM, instruction following, and general helpfulness, with multilingual, coding, and tool-calling abilities.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 shows Transformers usage in bfloat16 and explains that reasoning is enabled by passing enable_thinking=True to the chat template or by a specific system prompt with the response prefilled with a think tag.1

Organization context

Deep Cogito

Provenance and derivatives

Post-trained by Deep Cogito from Meta's Llama 3.1 405B base model. Deep Cogito's contribution is the post-training; the base model was pretrained by Meta.1 5

Derived from: Llama 3.1 405B (meta-llama/Llama-3.1-405B) — Meta base model; see the Llama family record.

Other releases in the Cogito family

Cogito v2.1 671BModel-disclosure tier (USASI rubric v0.2): Open-weight

Cogito 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.

Training code: unknown.
Training-data information: unknown.
Training-data access: unknown.
Complete training pipeline: unknown.
Legacy data assessment (v0.1): 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

Post-trained and published by Deep Cogito Inc., headquartered in San Francisco (see the deep-cogito record). The Llama 3.1 405B base model is Meta's; this record's eligibility rests on Deep Cogito's post-training and does not re-attribute the base model.1 7 8

Assessed Sep 29, 2026

Sources

1.
deepcogito/cogito-v2-preview-llama-405B model card (external site: huggingface.co)
Deep Cogito · Model card · accessed Sep 29, 2026
2.
deepcogito/cogito-v2-preview-llama-405B repository metadata (Hugging Face API) (external site: huggingface.co)
Hugging Face · Repository · accessed Sep 29, 2026
3.
cogito-v2-preview-llama-405B config.json (external site: huggingface.co)
Deep Cogito · Repository · accessed Sep 29, 2026
4.
Cogito v2 Preview: From Inference-time Search to Self-Improvement (external site: deepcogito.com)
Deep Cogito · Announcement · published Jul 31, 2025 · accessed Sep 29, 2026
5.
DeepCogito/cogito-v2 README (external site: github.com)
Deep Cogito · Repository · accessed Sep 29, 2026
6.
Llama 3.1 Community License Agreement (external site: raw.githubusercontent.com)
Meta · License · published Jul 23, 2024 · accessed Sep 29, 2026
7.
Deep Cogito (external site: deepcogito.com)
Deep Cogito · Official page · accessed Sep 29, 2026
8.
Deep Cogito Inc. Form D/A (accession 0002128259-26-000002) (external site: sec.gov)
U.S. Securities and Exchange Commission · Filing · published Apr 24, 2026 · accessed Sep 29, 2026

Email a correction Report a correction Edit this entry

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

Cite this page

APA style

USASI. (2026, September 29). Cogito v2 Preview Llama 405B. United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/open/cogito-v2-preview-llama-405b/

BibTeX

@misc{usasi_cogito_v2_preview_llama_405b,
  author = {{USASI}},
  title = {Cogito v2 Preview Llama 405B},
  year = {2026},
  month = sep,
  howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/open/cogito-v2-preview-llama-405b/}},
  note = {United States of America Superintelligence. Last updated 2026-09-29}
}

The date is when this page was last updated. Add the date you read it if your style needs one.

For maintainers: a “Listed in USASI” badge

Links to this page. It says the entry is listed, not endorsed or rated. About the badge

Markdown (for a README)

[![Listed in the USASI catalog](https://unitedstatesofamericasuperintelligence.com/badges/listed.svg)](https://unitedstatesofamericasuperintelligence.com/open/cogito-v2-preview-llama-405b/)

HTML

<a href="https://unitedstatesofamericasuperintelligence.com/open/cogito-v2-preview-llama-405b/"><img src="https://unitedstatesofamericasuperintelligence.com/badges/listed.svg" alt="Listed in the USASI catalog" height="20"></a>