ChatGPT Mil

Name: ChatGPT Mil
Brand: OpenAI

ChatGPT Mil is a military version of ChatGPT deployed by OpenAI on GenAI.mil — the U.S. Department of War's secure, enterprise generative AI platform. Launched on 31 August 2026, it marks the adoption phase of an enterprise partnership established between the Department and OpenAI in 2025.

The system is accredited to handle Controlled Unclassified Information (CUI) at Impact Level 5 (IL5) and runs in authorized government cloud infrastructure. Data processed on GenAI.mil stays isolated within the government environment and is not used to train OpenAI's public or commercial models.

The core experience centers on chat, files, projects, and custom GPTs. ChatGPT Mil supports document-heavy unclassified work — planning, policy, logistics, and administration — including summarizing and analyzing documents, drafting procurement and contracting materials, and generating reports and compliance checklists.

It is built for scale to support more than 3 million Department personnel. The deployment is led by the Chief Digital and AI Office (CDAO) and the Office of the Under Secretary of War for Research and Engineering, and supports the government AI Action Plan.

Web appEnterprise

Released 31 Aug 2026Updated 2 Sept 2026Enterprise only · United States

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Overview

System type

Input

TextDocuments

Output

TextSummariesReports

Access & Pricing

PUBLIC

Access channels

Web app

Access through a browser-based web application.

Availability scope

Enterprise only

United States

Available only to U.S. Department of War personnel (over 3 million users) via the GenAI.mil platform. Approved for unclassified (CUI) work.

Subscription model

Enterprise

Pricing

Updated 31 Aug 2026Official pricing

Government deployment under an enterprise partnership with the Department of War (established in 2025). No public pricing is disclosed.

Capabilities

4 capabilities

Reasoning & Planning

Agency & Action

Task Specialization

Integrations

Product features

Ecosystem

Related technologies

LLM

Architecture

Security & Enterprise

Security source

Compliance Controls

CUI / IL5 accreditation.

Data Residency

Data isolated in government cloud; no training on customer data.

Enterprise Access

SSO / SAML / Enterprise

Accredited for Controlled Unclassified Information (CUI) at Impact Level 5 (IL5). Runs in authorized government cloud infrastructure; data stays isolated within the government environment and is not used to train OpenAI public or commercial models.

Sources

2 sources

Bringing ChatGPT to GenAI.mil (OpenAI)

BlogFetched: 2 Sept 2026

Department of War Launches OpenAI's ChatGPT Mil on GenAI.mil

Official siteFetched: 2 Sept 2026