While the company implemented safeguards to limit misuse, the launch still caused debate in the crypto industry about the potential impact of advanced AI on blockchain security. Some experts believe the technology could make it easier to discover smart contract vulnerabilities, while others argue that operational security risks, like compromised wallets and infrastructure attacks, remain the bigger concern.
Crypto Security Concerns Grow…
Anthropic has officially released the first public version of its highly anticipated Claude Mythos artificial intelligence model, now branded as Fable 5. The launch opened many discussions in the cryptocurrency industry, with some investors, developers, and security experts expressing concerns about the potential impact the powerful AI system could have on blockchain security and decentralized finance (DeFi) platforms.
The concerns stem largely from Anthropic's previous disclosures about Mythos' capabilities. Earlier this year, the company revealed that the model identified more than 10,000 high- and critical-severity vulnerabilities across systemically important software projects. These findings raised questions about whether technology capable of discovering security flaws at such a scale should be actually made available to the public.
Anthropic tried to address these concerns by implementing safeguards that are designed to limit misuse. According to the company, Fable 5 has been adapted for general public use and includes built-in restrictions that redirect certain cybersecurity-related tasks to a separate model, Claude Opus 4.8. Anthropic acknowledged that a model with advanced cybersecurity capabilities carries inherent risks and stated that the guardrails were designed to reduce the likelihood of harmful applications.
Despite these protections, some members of the crypto community are still very worried. Moonrock Capital founder Simon Dedic warned that advanced AI models could dramatically reduce the expertise and resources needed to identify vulnerabilities in smart contracts.
He argued that unaudited protocols may become vulnerable as attackers gain access to more sophisticated automated tools capable of finding exploitable weaknesses. Dedic suggested that users take precautionary measures, including reviewing wallet permissions, reducing exposure to risky protocols, and storing assets in secure hardware wallets.
Not everyone agrees that the threat level is as severe. Curve Finance co-founder Michael Egorov argued that the success Mythos demonstrated in traditional software environments may not necessarily translate to smart contract ecosystems. He said that many of the software systems where vulnerabilities were discovered contain millions of lines of code, whereas smart contracts are generally much smaller and easier for both human auditors and existing AI tools to analyze.
Egorov suggested that the bigger risk may lie in operational security failures rather than direct smart contract exploits. He pointed to potential threats like compromised multisignature wallets, supply chain attacks targeting frontend dependencies, and other infrastructure-related weaknesses that support decentralized applications.
Anthropic also confirmed that a limited group of cybersecurity and infrastructure organizations will receive access to Claude Mythos 5, which is a version of the model that operates with fewer restrictions than the publicly available Fable 5 release.