Mariano-Florentino Cuéllar
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Mariano-Florentino (Tino) Cuéllar is a legal scholar, former California Supreme Court justice and AI-policy executive. Stanford's biography, reviewed October 8, 2026, identifies him as Anthropic's first Chief Global Affairs Officer, responsible for policy priorities, global and national-security strategy, and government relationships. He co-chaired California's working group on frontier artificial intelligence and has held academic roles addressing public law, AI and international security.[1]
Scholarship · AI governance · Public institutions · Frontier-AI policy
Roles and affiliations
Cuéllar joined Stanford's faculty in 2001 and served until 2015, including as a professor of law and director of the Freeman Spogli Institute for International Studies. He became a California Supreme Court justice in 2015 and continued teaching at Stanford during his nearly seven years on the court. He subsequently served as president of the Carnegie Endowment for International Peace. Stanford's January 15, 2026 account describes his scholarship on AI's effects on organizations, including liability, governance, decision-making norms, innovation and risk.[2]
His institutional biography records service in the White House and federal agencies across three presidential administrations and on the President's Intelligence Advisory Board and State Department's Foreign Affairs Policy Board. It also records service as Cameron Schrier Family Professor at Stanford Law School and senior fellow at Stanford's Institute for Human-Centered Artificial Intelligence.[1]
Contributions to AI law and policy
California frontier-AI policy
Cuéllar worked with Fei-Fei Li and Jennifer Tour Chayes on the Joint California Policy Working Group on AI Frontier Models. The Governor's office released the group's final California Report on Frontier AI Policy on June 17, 2025. Its release describes recommendations for evidence-based policymaking, transparency balanced with security considerations, and determining appropriate regulatory intervention as the technology develops. The final report incorporated public feedback following a March 2025 draft.[3]
Stanford's January 2026 account states that the report informed California Senate Bill 53, the Transparency in Frontier Artificial Intelligence Act. The report's recommendations and the enacted statute are separate instruments; Cuéllar's documented contribution was through the policy working group.[2]
Anthropic governance and government relations
Anthropic announced Cuéllar's appointment to its Long-Term Benefit Trust on January 21, 2026. The company's account describes the Trust as an independent body that selects directors and advises the board and leadership on the company's public-benefit mission. Cuéllar's accompanying statement advocated corporate governance connecting technological development with civic responsibility and the broader public interest.[4]
On August 4, 2026, Anthropic announced that he would join the company as Chief Global Affairs Officer and had stepped down from the Trust to do so. In that announcement, Cuéllar argued that democratic institutions should shape AI's development. The appointment gave him responsibility for policy, international engagement and government relationships; Stanford's subsequent biography identifies him as holding that role.[5][1]
Selected work
- The California Report on Frontier AI Policy (June 17, 2025) — working-group contribution; the Governor's release provides an accessible description and links to the report.[3]
Institutional coverage
- Stanford Report's January 2026 account of his academic career and AI-policy work.[2]
- Anthropic's January and August 2026 announcements concerning the Trust and executive appointment.[4][5]
Related articles
- Neel Guha — Coauthor of research on the feasibility of AI regulatory mechanisms.
- People in AI and Law
- Anthropic
- Policy
References
- ↑ 1.0 1.1 1.2 Stanford University, “Mariano-Florentino (Tino) Cuéllar,” institutional biography. Accessed October 8, 2026.
- ↑ 2.0 2.1 2.2 Melissa De Witte, Stanford Report, “Mariano-Florentino Cuéllar to return to Stanford,” January 15, 2026. Accessed October 8, 2026.
- ↑ 3.0 3.1 Governor of California, release announcing the California Report on Frontier AI Policy, June 17, 2025. Accessed October 8, 2026.
- ↑ 4.0 4.1 Anthropic, “Mariano-Florentino Cuéllar appointed to Anthropic’s Long-Term Benefit Trust,” January 21, 2026. Accessed October 8, 2026.
- ↑ 5.0 5.1 Anthropic, “Mariano-Florentino (Tino) Cuéllar to join Anthropic as Chief Global Affairs Officer,” August 4, 2026. Accessed October 8, 2026.