Method: a primary-source record, not a quotation contest
The source set contains 23 dated items: 6 for Amodei, 8 for Altman, 5 for Musk, and 4 for Hassabis. The record begins in 2015 and ends at the research cutoff. Every substantive timeline entry links to the full public source.
An item qualified if the named person wrote it, signed it, delivered it as testimony, or spoke in a full recording or official transcript. A company publication qualified only when it identified the person as author or speaker. The 2023 Future of Life Institute letter is attributed to Musk as a signatory, not as its author. The TIME interview with Hassabis is used as a direct question-and-answer source, with the publication's notice that the interview was condensed and edited. Automated video transcripts were checked against the full recordings and are paraphrased unless a short quotation is necessary.
The analysis uses three labels deliberately:
- Documented overlap means 2 or more speakers expressly endorsed the same principle in their own records. It does not imply a negotiated agreement.
- Direct disagreement requires a statement that rejects, displaces, or materially contradicts another recorded proposal.
- Difference means the speakers emphasized different risks or institutions without establishing a contradiction.
Silence is not disagreement. A change in detail is not automatically a reversal. Company interest can be relevant to a reader's evaluation, but this paper does not infer motive from position.
Primary-source index
Dario Amodei
- D01 · July 25, 2023. Written Testimony: Oversight of A.I.—Principles for Regulation. U.S. Senate Committee on the Judiciary.
- D02 · November 1, 2023. Prepared remarks at the AI Safety Summit. Anthropic.
- D03 · February 11, 2025. Statement on the Paris AI Action Summit. Anthropic.
- D04 · January 2026. The Adolescence of Technology. Authored essay.
- D05 · June 2026. Policy on the AI Exponential. Authored essay.
- D06 · July 27, 2026. Our position on open-weights models. Anthropic; identified as a post by Dario Amodei.
Sam Altman
- S01 · January 14, 2015. Policy for Growth and Innovation. Authored blog post.
- S02 · March 2, 2015. Machine Intelligence, Part 2. Authored blog post.
- S03 · May 16, 2023. Oversight of A.I.—Rules for Artificial Intelligence. Official U.S. Senate hearing transcript.
- S04 · May 22, 2023. Governance of Superintelligence. Coauthored with Greg Brockman and Ilya Sutskever.
- S05 · June 22, 2023. Written testimony before the U.S. Senate. OpenAI.
- S06 · June 22, 2023. Senate Questions for the Record. OpenAI.
- S07 · July 22, 2025. Federal Reserve fireside chat. Official transcript.
- S08 · April 6, 2026. Sam Altman on Building the Future of AI. OpenAI Forum event replay and transcript.
Elon Musk
- E01 · July 15, 2017. Conversation with Elon Musk at the National Governors Association. Full session; official NGA archive page and complete recording.
- E02 · March 11, 2018. Elon Musk Answers Your Questions—SXSW 2018. Full SXSW session recording.
- E03 · March 22, 2023. Pause Giant AI Experiments: An Open Letter. Future of Life Institute; Musk is a signatory.
- E04 · November 2, 2023. Conversation with Prime Minister Rishi Sunak. Full 10 Downing Street conversation.
- E05 · July 29, 2026. The full-length interview with Elon Musk. The Economist full interview recording.
Demis Hassabis
- H01 · September 7, 2023. TIME100 AI Q&A. Direct interview; condensed and edited by TIME.
- H02 · August 14, 2024. Unreasonably Effective AI. Google DeepMind Podcast, full episode.
- H03 · June 2, 2026. A Conversation with Demis Hassabis. Stanford Graduate School of Business, full conversation.
- H04 · July 14, 2026. A Framework for Frontier AI and the Dawning of a New Age. Authored essay.
Source and interpretation limits
This corpus is broad, not exhaustive. It prioritizes sources in which regulation is discussed at enough length to reveal the proposed mechanism and its limits. Public remarks can omit private beliefs, later changes, or details expressed elsewhere. A signature establishes endorsement of a letter, not authorship. An interview transcript can contain transcription errors; the analysis therefore relies on the full recording and avoids making a disputed word carry a conclusion.
The research cutoff is September 13, 2026. Later statements may change the comparison.
Research and editorial production: RVA Cyber Citation format: Speaker initial plus chronological item number. Editorial standard: Exact. Humane. Consequential.