ARTFEED — Contemporary Art Intelligence

Anthropic AI Source Code Leak Sparks Intense Interest Among Chinese Tech Community

digital · 2026-04-02

Anthropic, a U.S.-based artificial intelligence startup, experienced a significant security breach when an employee accidentally included modified source code for Claude Code, the company's AI-powered coding assistant, in a publicly accessible software package. The leak, containing over 512,000 lines of code, was discovered and decrypted by software engineer and cybersecurity researcher Shou Chaofan on Tuesday. He subsequently shared the findings on X.com, where the post garnered more than 33 million views by Thursday, attracting global attention. This incident has generated considerable excitement within China's developer community, where individuals have been actively downloading and analyzing the leaked materials. Anthropic, along with other major AI firms like OpenAI and Google, does not offer its services in mainland China, citing national security concerns. The company had previously identified China as an adversarial nation and implemented access restrictions. Despite these barriers, Chinese developers have shown strong interest in Anthropic's AI models due to their advanced capabilities in automating programming tasks such as code writing and debugging, which enhance development efficiency. Typically, developers in China access such services through virtual private networks. The countries currently blocked from using Claude's chatbots and AI models include China, Russia, North Korea, Afghanistan, Iran, and Cuba.

Key facts

  • Anthropic, a U.S. AI startup, accidentally leaked source code for Claude Code, its AI coding tool.
  • The leak occurred when an employee included modified source code in a software package hosted online.
  • Software engineer and cybersecurity researcher Shou Chaofan discovered and decrypted the code on Tuesday.
  • Shou Chaofan posted the code on X.com, where it received over 33 million views by Thursday.
  • The source code comprises more than 512,000 lines.
  • Chinese developers have been actively downloading and studying the leaked code.
  • Anthropic restricts access to its services in mainland China, citing national security concerns.
  • Other countries blocked from using Claude's services include Russia, North Korea, Afghanistan, Iran, and Cuba.

Entities

Institutions

  • Anthropic
  • OpenAI
  • Google

Locations

  • China
  • United States
  • Russia
  • North Korea
  • Afghanistan
  • Iran
  • Cuba

Sources