Daniela Amodei said she and colleagues had been working during 2021 on Anthropic, which they announced on 2021-05-28.

True if Anthropic was publicly announced on or about 2021-05-28, and dated records (the announcement, press coverage, filings or interviews) show that Daniela Amodei and her colleagues worked on founding or setting up Anthropic during 2021 before that announcement. Mostly true if the announcement and the work both happened but a minor detail is off, for example the founding work began in late 2020 rather than 'this year', or the announcement date is off by a few days. Mixed if the announcement on that date concerned Anthropic but Daniela Amodei's involvement in the 2021 work cannot be confirmed, or the reverse. Mostly false if what was announced that day was something other than Anthropic's launch, while still related to her work. False if no such announcement was made around that date, or if the evidence shows she was not involved in Anthropic's founding work.

Set before the research began.

1. E1 Anthropic raises $124 million Series A Anthropic · 28 May 2021 Own record

   “The company is led by siblings Dario Amodei (CEO) and Daniela Amodei (President).”

2. E2 Anthropic raises $124 million Series A Anthropic · 28 May 2021 Own record

   “Anthropic, an AI safety and research company, has raised $124 million in a Series A.”

3. E3 Anthropic: history, people and positions frontierminds.ai · 27 October 2026

   “At the end of 2020 Dario Amodei, OpenAI's vice president of research, left with six colleagues: his sister Daniela, Jared Kaplan, Chris Olah, Tom Brown, Sam McCandlish and Jack Clark.”

4. E4 Anthropic: history, people and positions frontierminds.ai · 27 October 2026

   “In January 2021, Daniela Amodei told Wired, the group met for the first time under a tent in Dario's backyard, in the rain, to pitch Eric Schmidt.”

Anthropic's announcement dated 2021-05-28 (E1, E2) reports its $124 million Series A and names Daniela Amodei as President. An independent profile (E3) says she was one of the group that left OpenAI with Dario Amodei at the end of 2020. Citing her account to Wired, the same profile (E4) says the group first met in January 2021 to pitch Eric Schmidt, which places founding work in 2021 before the announcement. Leaving OpenAI in late 2020 does not show that founding work began then, since the group's first meeting was in January 2021, so the claim meets the criteria for true.