Key Takeaways Federal authorities have removed export restrictions on Anthropic’s Fable 5 and Mythos 5 artificial intelligence systems, which were halted on June 12 due to cybersecurity issue
The U.S. Department of Commerce has removed export restrictions on Anthropic’s most sophisticated artificial intelligence systems, Fable 5 and Mythos 5, approximately three weeks following their suspension due to national security considerations.
Claude Fable 5 will be available again globally tomorrow.
After a series of productive conversations with the US government, we're redeploying the model with a new set of classifiers to target and block more cybersecurity tasks. In the near term, some routine tasks like coding…
— Anthropic (@AnthropicAI) July 1, 2026
The company announced it would begin reinstating access to both systems starting Wednesday after receiving official notification that limitations had been removed.
The pair of AI systems were suddenly withdrawn on June 12 following federal government concerns regarding their potential use in exploiting computer system vulnerabilities.
Security analysts had identified a possible “jailbreak” technique — a workaround method to circumvent the systems’ integrated safety protocols.
Anthropic contested the action initially, arguing that authorities had not specified particular security issues and that a “limited potential exploit” provided insufficient justification to withdraw a product serving hundreds of millions globally.
Fable 5 represents a consumer-oriented system engineered for advanced reasoning capabilities and autonomous task execution. Mythos 5 targets enterprise clients and cybersecurity experts, featuring functionality to detect and assess weaknesses in software code.
Commerce Secretary Howard Lutnick issued correspondence to Anthropic verifying the removal of restrictions.
The communication outlined that Anthropic has committed to implementing proactive security threat identification and remediation protocols, along with mandatory government notification regarding malicious activities.
The organization has further agreed to engage in collaborative oversight with authorities concerning future model deployments. Federal officials retained authority to reinstate limitations if circumstances warrant.
Anthropic emphasized that while individual safety mechanisms may have limitations, their combined implementation creates substantial barriers to system misuse.
Amazon and Broadcom represent the primary infrastructure providers supporting Anthropic’s artificial intelligence platforms.
Amazon has previously committed $13 billion in investment to Anthropic with authorization for an additional $20 billion in future funding. Anthropic has contracted to allocate over $100 billion across a decade utilizing Amazon Web Services infrastructure.
Broadcom disclosed an agreement earlier this year to provide Anthropic with 3.5 gigawatts of computational resources via Google’s AI processing units, commencing in 2027.
During Wednesday’s opening trading session, Amazon shares remained essentially unchanged while Broadcom declined approximately 1.9%.
The prolonged suspension had generated investor concerns about Anthropic potentially losing competitive positioning. OpenAI indicated its GPT-5.6 systems would launch with restricted access for vetted customers initially, with expanded availability anticipated in subsequent weeks.
Market analysts expect both Anthropic and OpenAI to pursue initial public offerings with valuations exceeding $1 trillion before year-end.
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