Description: Anthropic reported that a northern Yemen-based weapons cell, designated GTG-87001, used Claude Code across three weapons programs to develop guidance, navigation, and control software. The actors reportedly test-fired a guided rocket that appeared to fail, then returned to Claude for failure analysis. Anthropic said it banned associated accounts and shared threat intelligence with partners.
Editor Notes: (1) Incident ID date 09/10/2026 uses Anthropic's first public disclosure because no GTG-87001-specific event date was disclosed; the report covers activity from 12/2025–08/2026. (2) Anthropic said it banned associated accounts, shared threat intelligence with public- and private-sector partners, and strengthened safeguards. (3) On 09/11/2026, FT and AP connected the northern Yemen location to Houthi-controlled territory, but Anthropic did not identify the actors as Houthis.
Entities
View all entitiesAlleged: Anthropic , Large language model developers , AI agent system developers and Chatbot developers developed an AI system deployed by GTG-87001 , Threat actors and Chatbot users, which harmed National security and intelligence stakeholders.
Alleged implicated AI systems: Claude Code , Claude , Large language models , Chatbots and AI agent systems
Incident Stats
Incident ID
1687
Report Count
1
Incident Date
2026-09-10
Editors
Daniel Atherton
Incident Reports
Reports Timeline
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Yemeni militants sought to use Anthropic’s Claude AI model to develop guidance, control and navigation software for its ballistic missiles, the US company said.
In its intelligence threat report released on Thursday, Anthropic did not name …
Variants
A "variant" is an AI incident similar to a known case—it has the same causes, harms, and AI system. Instead of listing it separately, we group it under the first reported incident. Unlike other incidents, variants do not need to have been reported outside the AIID. Learn more from the research paper.
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