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Tech stocks today: Anthropic does damage control after Claude leak, Iran threaten Big Tech operations
Tech stocks rose on Wednesday morning as markets staged a comeback to end the first quarter on a high note after a brutal March.
Shares of Apple (AAPL), Google (GOOG), Nvidia (NVDA), and Microsoft (MSFT) were modestly higher despite a warning from Iran’s Revolutionary Guard Corps (IRGC) that it would target the companies’ operations.
In other tech news, Anthropic raced to remove copies of leaked source code for its Claude AI agent app after the company accidentally exposed Claude Code’s underlying instructions, giving competitors and hackers new information about the model.
Anticipation continues to build around an Anthropic (ANTH.PVT) IPO, expected as early as this year, as well as the public debut of Elon Musk’s SpaceX (SPAX.PVT).
Anthropic accidentally leaked thousands of lines of code
Anthropic PBC inadvertently released internal source code behind its popular artificial intelligence-powered Claude coding assistant, raising questions about the security of an AI model developer that has built its brand on prioritizing safety.
“Earlier today, a Claude Code release included some internal source code. No sensitive customer data or credentials were involved or exposed,” Anthropic said in an emailed statement late Tuesday. “This was a release packaging issue caused by human error, not a security breach.”
The accidental release marked Anthropic’s second security slip-up in a matter of days, compromising approximately 1,900 files and 512,000 lines of code related to Claude Code — an agentic coding tool that runs directly inside developer environments. Last week, Fortune separately reported that Anthropic had been storing thousands of internal files on a publicly accessible system, including a draft blog post that detailed an upcoming model known internally as both “Mythos” and “Capybara.”
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Exclusive: Anthropic is testing ‘Mythos,’ its ‘most powerful AI model ever developed’
AI company Anthropic is developing, and has begun testing with early access customers, a new AI model more capable than any it has released previously, the company said, following a data leak that revealed the model’s existence.
An Anthropic spokesperson said the new model represents “a step change” in AI performance and is “the most capable we’ve built to date.” The company said the model is currently being trialed by “early access customers.”Descriptions of the model were inadvertently stored in a publicly accessible data cache and were reviewed by Fortune.
A draft blog post that was available in an unsecured and publicly searchable data store prior to Thursday evening said the new model is called Claude Mythos and that the company believes it poses unprecedented cybersecurity risks.
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