Ben Mann
Anthropic co-founder; co-author of the GPT-3 paper and of Anthropic's RLHF and Constitutional AI papers
Ben Mann is a co-founder of Anthropic. Mann's own site says Mann spent six years as a software engineer at Google, then worked at OpenAI and MIRI before co-founding Anthropic, and that as of 2023 Mann was leading product engineering there. Anthropic's January 2026 announcement of its expanded Labs team, which incubates experimental products at the frontier of Claude's capabilities, said Mike Krieger would join Labs to build alongside Mann, and in October 2026 Anthropic named Mann as the co-founder who signed its memorandum of understanding with Singapore's Ministry of Digital Development and Information. Mann is the second-listed author of "Language Models are Few-Shot Learners" (2020), the GPT-3 paper, and a co-author of Anthropic's 2022 papers on training a helpful and harmless assistant with RLHF and on Constitutional AI.123567
Career
Ben Mann's personal site describes six years as a software engineer at Google, followed by starting a company and then turning to AI safety through work at OpenAI and MIRI. Mann then co-founded Anthropic and, as of 2023, was leading product engineering there.1
Anthropic's January 2026 announcement of an expanded Labs team, focused on incubating experimental products at the edge of Claude's capabilities, said Mike Krieger would join Labs to build alongside Mann. Mann has also represented Anthropic as a co-founder at public events, sharing the opening keynote with Dario Amodei at the Tokyo Builder Summit in October 2025.24
In October 2026 Mann signed a memorandum of understanding between Anthropic and Singapore's Ministry of Digital Development and Information, covering technical exchanges on model evaluation, testing standards and incident response, as Anthropic opened an office in Singapore.3
Research
Mann is the second-listed author, after Tom B. Brown, of "Language Models are Few-Shot Learners" (2020), the paper that introduced GPT-3. At Anthropic, Mann co-authored the 2022 paper on training a helpful and harmless assistant with reinforcement learning from human feedback, and the December 2022 Constitutional AI paper on training harmless assistants from AI feedback guided by a set of principles.567
Work
Language Models are Few-Shot Learners (GPT-3) (external site: arxiv.org)Published research
Second-listed author, after Tom B. Brown, of the 2020 paper that introduced GPT-3.5
Training a Helpful and Harmless Assistant with Reinforcement Learning from Human Feedback (external site: arxiv.org)Published research
Co-author of the 2022 Anthropic paper on applying preference modeling and RLHF to fine-tune language models as helpful and harmless assistants.6
Constitutional AI: Harmlessness from AI Feedback (external site: arxiv.org)Published research
Co-author of the 2022 Constitutional AI paper.7
Career timeline
May 28, 2020
Second-listed author of "Language Models are Few-Shot Learners", the GPT-3 paper.5
Apr 12, 2022
Co-authored Anthropic's paper on training a helpful and harmless assistant with RLHF.6
Dec 15, 2022
Co-authored "Constitutional AI: Harmlessness from AI Feedback".7
2023
Leading product engineering at Anthropic, according to Mann's personal site.1
Oct 28, 2025
Gave the opening keynote with Dario Amodei at Anthropic's Tokyo Builder Summit.4
Jan 13, 2026
Named in Anthropic's announcement of the expanded Labs team, which Mike Krieger joined to build alongside Mann.2
Oct 14, 2026
Signed Anthropic's memorandum of understanding with Singapore's Ministry of Digital Development and Information.3
Other documented roles
Roles the sources document but that are not confirmed as current.
In the news
USASI news stories that name Ben Mann.
Related people
More sourced profiles at the same organization, in the same field, or from the same school.
- Amanda AskellAlso at Anthropic
- Arthur ConmyAlso at Anthropic
- Ami VoraAlso at Anthropic
- Aylin CaliskanSafety and alignment
- Awni HannunAlso at Anthropic
- Collin BurnsAlso at OpenAI
- Boris ChernyAlso at Anthropic
- Diogo AlmeidaAlso at OpenAI
- Cat WuAlso at Anthropic
- Eric Michael SmithSafety and alignment
- Chris OlahAlso at Anthropic
- Ethan PerezAlso at Anthropic
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