“Co-founders John Schulman also left, so did Andrej Karpathy and Jan Leike, and perhaps a dozen others.”
Our reading, the sentence that was checked:
John Schulman, Andrej Karpathy, Jan Leike and perhaps a dozen others have left OpenAI.
Assessment: Supported Evidence as of
Where and when Gary Marcus wrote it
Marcus on AI, OpenAI’s slow-motion train wreck, paragraph 6.
- Said
- Source observed
- live page, full text, public
- Evidence as of
- the cutoff for this assessment
- Assessment recorded
- assessment marcus-openais-slow-motion-train-wreck-dd6d38-a1
We recorded 6 claims from this post. See every claim from this post.
The wording above is the version this site observed on 2026-10-28. The source may have been edited after 2024-09-25. This page does not claim the wording was captured then.
What the claim commits to
- Kind
- Observation
- Deadline, as the speaker wrote it
- None stated. This site does not add one.
- Deadline state when assessed
- No horizon
- Deadline state on 2026-10-29
- No horizon (the release’s reference date)
From the speaker
- John Schulman also left
- so did Andrej Karpathy and Jan Leike
- perhaps a dozen others
Our interpretation
- The firm, checkable commitment is that each of the three named people had left OpenAI by September 25, 2024.
- No starting date is stated for the departures, so the target interval has an open beginning.
- 'Perhaps a dozen others' is a hedged estimate with no defined population or counting period; support for the named departures does not verify that number.
- Read the co-founder description as applying to Schulman, rather than as a separate assertion that every subsequently named person co-founded OpenAI.
Counts as supported if: Reliable dated records establish that Schulman, Karpathy, and Leike had each left OpenAI by publication.
Counts as contradicted if: Reliable records establish that at least one named person had not left OpenAI by publication.
Retrospective: these criteria were written after the outcome was public.
Current assessment
Was it true for the period described?
Outcome: Supported
The dated evidence matches what the claim committed to, under the criteria frozen before grading.
Scored on a plain reading. The speaker named no measure for this claim, so it was judged on the reading an informed reader would take, stated below under our interpretation. Both reviews had to find that reading fair.
- Evidence as of
- Deadline state when assessed
- No horizon
- Assessment recorded
- Policy version
- 2026-10-28.7
Rationale
All three named departures are supported: Karpathy left in February, Leike in May, and Schulman in August. The outcome applies to those firm factual statements. It does not certify the hedged suggestion of another dozen departures.
Limitations
- The additional count remains unverified and lacks a defined counting period.
- The cited records are news reports; two include company confirmations, and the third is a profile of Leike.
Evidence (3 items)
Supports the claim: TechCrunch,
John Schulman, one of the co-founders of OpenAI, has left the company for rival AI startup Anthropic.
Why it matters here: The report establishes Schulman's departure before the post and identifies him as a co-founder.
- Where
- Opening paragraph
- Publisher
- TechCrunch
- Kind of source
- News report
- Describes events of
- Public from
Supports the claim: TechCrunch,
Andrej Karpathy, a widely respected research scientist, announced today that he has left OpenAI.
Why it matters here: Karpathy's February departure preceded Marcus's September post. Month precision avoids confusion between the article's local date and the embedded social post's date.
- Where
- Opening sentence
- Publisher
- TechCrunch
- Kind of source
- News report
- Describes events of
- Public from
Supports the claim: TIME,
But in May, Leike made a dramatic exit, accusing OpenAI of prioritizing “shiny products” over safety.
Why it matters here: The profile explicitly places Leike's departure in May, before the post.
- Publisher
- TIME
- Kind of source
- News report
- Describes events of
- Public from
Where it was said (1)
Said once in the sources this register covers.
: Marcus on AI, OpenAI’s slow-motion train wreck
Co-founders John Schulman also left, so did Andrej Karpathy and Jan Leike, and perhaps a dozen others.
- Where
- paragraph 6
- Published
- 2024-09-25
- Source observed
- , live page
- Access
- full text, public
History
Assessment versions
- Assessment marcus-openais-slow-motion-train-wreck-dd6d38-a1: Current. Outcome: Supported. Evidence as of 2026-10-28. Public date not recorded.
Recorded events
Assessment publishedBy this site
First assessment published after both reviews and the final-text check passed.
About assessment marcus-openais-slow-motion-train-wreck-dd6d38-a1.