{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2021-05-28-anthropic-founded/","md":"https://postcutoff.com/e/2021-05-28-anthropic-founded/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2021-05-28-anthropic-founded","date":"2021-05-28","date_precision":"day","short_title":"Anthropic launches with a focus on AI safety","deck":null,"takeaway":"Anthropic, founded by former OpenAI researchers including Dario and Daniela Amodei, announced a $124M Series A to build reliable, interpretable and steerable AI systems.","category":"business","category_label":"Business","importance":3,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":[{"n":1,"title":"Anthropic raises $124 million (Anthropic)","url":"https://www.anthropic.com/news/anthropic-raises-124-million-to-build-more-reliable-general-ai-systems","type":"official","group":"primary","domain":"anthropic.com"},{"n":2,"title":"Wikipedia: Anthropic","url":"https://en.wikipedia.org/wiki/Anthropic","type":"discussion","group":"reactions","domain":"en.wikipedia.org"}],"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"],"title":"Anthropic launches with a focus on AI safety","summary":"Anthropic, founded by former OpenAI researchers including Dario and Daniela Amodei, announced a $124M Series A to build reliable, interpretable and steerable AI systems.","key_facts":["Series A: $124 million, announced May 2021","Co-founders include Dario Amodei (CEO) and Daniela Amodei (President)","Structured as a public benefit corporation","Later developed Constitutional AI and the Claude model family"],"key_numbers":[],"tags":["organization","safety","anthropic"],"science":null,"body_md":"## What happened\n\nAnthropic emerged publicly with its first funding round and a research agenda centered on safety.\n\n## Why it matters\n\nBecame one of the three leading frontier labs, whose Claude models and safety research (RSP, interpretability) shaped the industry.","disputed":[],"related":[{"id":"2023-03-14-claude-1","url":"https://postcutoff.com/e/2023-03-14-claude-1/","date":"2023-03-14","date_precision":"day","short_title":"Anthropic releases Claude","deck":null,"takeaway":"Started the Claude model family, which became a leading competitor to GPT models, especially in coding and agents.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]},{"id":"2022-12-15-constitutional-ai","url":"https://postcutoff.com/e/2022-12-15-constitutional-ai/","date":"2022-12-15","date_precision":"day","short_title":"Anthropic introduces Constitutional AI (RLAIF)","deck":null,"takeaway":"Showed alignment could scale with AI supervision, making values explicit and auditable; RLAIF is now widespread.","category":"policy-safety","category_label":"Policy & safety","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Anthropic"]}],"people":[{"id":"dario-amodei","name":"Dario Amodei","url":"https://postcutoff.com/person/dario-amodei/"},{"id":"daniela-amodei","name":"Daniela Amodei","url":"https://postcutoff.com/person/daniela-amodei/"}],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":null}