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On November 4, 2026, reports said that ByteDance issued new internal rules on the use of AI tools, restricting employees from using external AI tools such as Claude and Codex through personal accounts to access the company's internal materials. According to a Phoenix Technology report, the rules, effective this month, impose a ban on external AI access to all L4-level code repositories and Feishu documents across the company, and AI accounts purchased by employees themselves will no longer be able to access the relevant internal resources. Hong Dingkun, a ByteDance executive, responded on the company's internal network that internal information security is an important consideration behind this adjustment, and that the consequences of any leak of L3-and-above content would be serious. A cnBeta report the same day also mentioned this restriction and pointed out that when external AI tools read a company's internal code repositories and technical documents, they may bring the risk of sensitive information being transmitted to third-party services. The rules have now entered the implementation stage, and no further developments have been disclosed.
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Report: ByteDance to Broadly Restrict Employees' Internal Personal-Paid Use of Claude, Codex and OthersDevelopments
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ByteDance restricts employees from using external AI tools to access internal materials
Source:Phoenix Technology
Reports and discussion timeline
Browse reports and discussion by time. Their evidence levels remain distinct.
Nov 4
IT Home · Artificial Intelligence
Report: ByteDance to Broadly Restrict Employees' Internal Personal-Paid Use of Claude, Codex and Others
According to a tip from Dachang Ribao on November 3, ByteDance will broadly restrict the internal use of personal accounts for Claude, Codex and others; the notice, issued last week, sparked internal discussion. ByteDance Technical Vice President Hong Dingkun responded on the internal network that once L3-and-above content leaks, the consequences are very serious, and held that promoting a product should not rely on banning other options to force usage. Previously, in May 2025, ByteDance's security and risk control department had announced that starting June 30, 2025, third-party AI development software such as Cursor and Windsurf would be banned in batches, with Trae as the replacement.
cnBeta
ByteDance to Broadly Restrict Employee Use of External AI Tools Such as Claude and Codex
ByteDance will broadly restrict employee use of external AI coding tools such as Claude and Codex. Hong Dingkun, the person in charge, responded on the internal network that internal information security is an important consideration behind this adjustment, and that once L3-and-above content is leaked, the consequences are serious. The report notes that when external AI tools read a company's internal code repositories and technical documents, they may bring the risk of sensitive information being transmitted to third-party services.
Phoenix Technology
Report: ByteDance Restricts Employee Access to Internal Materials via External AI Tools Such as Claude and Codex
According to a report by Dachang Ribao, ByteDance has introduced new internal rules on the use of AI tools. Starting this month, external AI access is banned for all L4-level code repositories and Feishu documents company-wide, and AI accounts purchased by employees themselves will no longer be able to access the relevant internal resources. ByteDance executive Hong Dingkun responded on the internal network that internal information security is an important consideration behind this adjustment, and that the consequences of any leak of L3-and-above content would be serious.