As a company that is preparing to go public on the biggest stock exchange in the world (New York Stock Exchange), Anthropic, the company otherwise known for its world-renowned AI assistant Claude, has just made one, if not the biggest mistake yet… leaking its source code.
On March 31, 2026, Anthropic, the flagship company behind Claude, accidentally leaked the source code behind the Claude Code, an AI-based coding agent. A file known as a “source map,” a file typically used to connect private code, was made public by accident. The code, as reported by Zscaler, contained 513,000 lines of code and was discovered by security researcher Chaofan Shou.
This quickly caught the attention of the developer community, and soon enough, the GitHub repository containing this code was copied or “forked” over tens of thousands of times within hours.
However, the timing of this incident only made it worse. For a company such as Anthropic with plans of going public in the near future, competitors now have the exact blueprint for one of the most in-demand models in the AI sector, an AI model known as “Mythos,” known to be the company’s most advanced and powerful model yet.
According to Anthropic, the cause of this error was a packaging error. A spokesperson said, “This was a release packaging issue caused by human error, not a security breach. We’re rolling out measures to prevent this from happening again.”
To the average person, this source code leak might just sound like a technical problem. But this leak raises new implications beyond the model.
Claude is a product that millions of students, employees, and users rely on daily, and its coding assistant is one of the most used tools to-date. When the blueprint behind that model is accidentally “handed” or leaked to the entire world, it raises an ethical concern. Can we trust the people building the everyday tools that we depend on?
There is a significant safety concern behind this. Researchers warn that with enough exposed code, users would be able to steal sensitive information, such as login credentials and personal data. This doesn’t just create another privacy concern, but exposes the people who used these products and have entrusted them with their personal information. Beyond this, Anthropic claimed privacy was their priority in comparison to all the other models competing with Claude. But this leak raises questions about Anthropic’s brand promise and what it stands for. But does this mean we cannot trust these models? Anthropic will likely recover from this setback and push the already growing industry to even higher standards, but if it does not, its next mistake could be very costly.