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Personnel: Sam McCandlish at Anthropic (Co-founder)

Verdictconfirmed95%
3 checks · 2 src · 4/13/2026
⚠ Checks disagree: 1 unverifiable, 2 confirmed

The source text explicitly lists Sam McCandlish as one of the founders of Anthropic and confirms the company was founded in 2021. The record claims he is a co-founder at Anthropic with a start date of 2021-01 (January 2021). The source confirms both the person, organization, role (co-founder), and founding year. While the source does not specify the exact month (January), the year 2021 is confirmed, and the month-level precision in the claim is reasonable given the company's founding in 2021.

Our claim

entire record
Role
Co-founder
Role Type
career
Start Date
January 2021
Is Founder
Yes

Source evidence

2 src · 3 checks
unverifiable95%Haiku 4.5 · 4/4/2026

NoteThe source is Anthropic's company page describing their mission, values, and governance structure. While it confirms Anthropic exists and lists current board members, it does not provide information about Sam McCandlish or his role as co-founder. The absence of his name from the board listing does not contradict the claim (he may have been a co-founder but no longer on the board), but the source simply does not address the specific personnel record being verified. This is unverifiable based on the provided source text.

confirmed95%Haiku 4.5 · 4/13/2026

NoteThe source text explicitly lists Sam McCandlish as one of the founders of Anthropic and confirms the company was founded in 2021. The record claims he is a co-founder at Anthropic with a start date of 2021-01 (January 2021). The source confirms both the person, organization, role (co-founder), and founding year. While the source does not specify the exact month (January), the year 2021 is confirmed, and the month-level precision in the claim is reasonable given the company's founding in 2021.

confirmed99%claim-verification · 4/6/2026
Wikipedia explicitly lists Sam McCandlish among the founders
Case № zorulH1O2HFiled 4/13/2026Confidence 95%
Source Check: Personnel: Sam McCandlish at Anthropic (Co-founder) | Longterm Wiki