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94 people, organisations and other records · 122 relationships · 34 claims about a valueEverything recorded up to the chosen year, whether or not still in effect · Undated records included
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Liam Fedus posted on X on 17 March 2025 a message to his OpenAI colleagues saying that he had decided to leave OpenAI as an employee. Copy claim link
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Machine-checked, not reviewed by an editor Stated in source Supported
Supporting evidence: primary + secondary · 2 sources
Date 2025-03-17 · event Role VP of research for post-training Scope and limits The post establishes the announcement; the role left is taken from TechCrunch’s report of the same day (reporting). The post as retrieved is truncated and does not give a last working day; the record does not establish the terms of any later partnership with OpenAI.
The evidence 02 primary source Supports the claim
Liam Fedus post on X, 17 March 2025 ↗ X · 2025-03-17
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Paraphrase Fedus introduces a message he sent to colleagues at OpenAI, which says he decided to leave OpenAI as an employee while seeking to work with it as a partner.
Location in source X post, first two sentences
How it was read Post text read through X’s syndication endpoint, which can truncate long notes
Machine-checked · 2026-10-15
Source details and check notes Authors Liam Fedus Version Dated post, retrieved on 2026-10-15 (SHA-256 4fe8256a31af652a3e4365cdd009261d1f2820ed5e1873e8d3021ecd4ad05f3a) through X’s own syndication endpoint for the post’s text, which truncates long notes. Canonical address Open the canonical source ↗ Accessed 2026-10-15 Language English (en) Attribution Liam Fedus, “Liam Fedus post on X, 17 March 2025”, 2025-03-17. Reuse No open redistribution licence asserted. Bibliographic metadata, editorial paraphrases and short attributed quotations (at most 50 words each). Recheck terms before wider redistribution. Check notes Candidate pack passage, lab genealogy (research/lab-genealogy). The paraphrase’s verbatim anchor “to leave OpenAI” matched the retrieved text on 2026-10-15 and again in a fresh retrieval the same day. Read through X’s own syndication endpoint for the post’s text, which truncates long notes. Matching ignored differences of whitespace, case, quotation marks, apostrophes, dashes and Unicode compatibility forms, so the source’s typography can differ. The paraphrase is Selekoa’s; only the anchor is the source’s wording. No human editorial review. secondary source Supports the claim
OpenAI exec leaves to found materials science startup ↗ TechCrunch · 2025-03-17
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Source excerpt “Liam Fedus, OpenAI’s VP of research for post-training, is leaving the company to found a materials science AI startup.” Location in source Paragraph 1
How it was read Retrieved directly from the publisher
Machine-checked · 2026-10-15
Source details and check notes Authors Kyle Wiggers Version Dated page, retrieved on 2026-10-15 (SHA-256 76d8ae1bc1337c227ab6b0f7958aabcd02482d4fd6aa9b06ad1a48b8471e9b09) directly from the publisher. Canonical address Open the canonical source ↗ Accessed 2026-10-15 Language English (en) Attribution Kyle Wiggers, “OpenAI exec leaves to found materials science startup”, 2025-03-17. Reuse No open redistribution licence asserted. Bibliographic metadata, editorial paraphrases and short attributed quotations (at most 50 words each). Recheck terms before wider redistribution. Check notes Candidate pack passage, lab genealogy (research/lab-genealogy). The quotation (19 words) matched the retrieved text on 2026-10-15 and again in a fresh retrieval the same day. Read directly from the publisher. Matching ignored differences of whitespace, case, quotation marks, apostrophes, dashes and Unicode compatibility forms, so the source’s typography can differ. No human editorial review. Status and meaning Editorial status. Not reviewed by an editor . An exploratory record that no editor has accepted. This status does not say whether a person has read any linked passage. Each evidence record above shows how it was checked.
Relation. A source announced this person’s departure from a specified role. The event date is the announcement, not an inferred final working day or end of every association.
Date. Date of the X post (20:59 UTC); not a last working day.
Record ID lg-gw-fedus-openai-departure-2025