Sam Blackshear, the co-founder and Chief Technology Officer of Mysten Labs, has announced his departure from the company to pursue a new role at the artificial intelligence safety firm Anthropic. As a primary architect behind the Sui blockchain and the creator of the Move programming language, Blackshear’s transition marks a significant leadership shift within the Web3 infrastructure sector. According to a statement released on August 6, 2026, he will pivot his focus toward defensive security research within the AI landscape.
Shift to AI Security and Continued Ecosystem Involvement
Blackshear noted that his motivation for joining Anthropic stems from a perceived shift in the balance between offensive and defensive capabilities in modern technology. By transitioning to AI-focused security, he aims to contribute to the resilience of emerging systems. Despite leaving his full-time executive position, Blackshear will not fully sever ties with the decentralized finance (DeFi) space.
- Blackshear will remain an advisor to both Mysten Labs and the broader Sui ecosystem.
- He will actively participate in the newly formed Move Foundation to oversee the language's development.
- His research at Anthropic will prioritize mitigating systemic risks associated with large-scale AI models.
Leadership Transition and the Future of Sui
The technical leadership at Mysten Labs will be assumed by Evan Cheng, the current CEO and co-founder (known as @EvanWeb3), who will integrate these responsibilities into the company’s ongoing roadmap. This transition occurs as the Sui Network continues to scale its throughput and expand its utility in the Layer 1 blockchain market. The Move language, originally developed at Meta (formerly Facebook), remains a cornerstone of the Sui architecture, designed to provide enhanced safety and resource management for smart contracts.
"The balance of offensive and defensive capabilities is shifting, and I am motivated to dedicate myself to the field of security", stated Blackshear regarding his move to Anthropic.
The departure of a high-profile technical founder highlights the increasing intersection between blockchain security principles and artificial intelligence safety. While Mysten Labs enters a new chapter of technical governance under Cheng, the Move community is expected to maintain its trajectory through the structured support of the Move Foundation, ensuring that the core programming logic of the Sui blockchain remains robust and decentralized.
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