---
id: "2021-05-28-anthropic-founded"
url: "https://postcutoff.com/e/2021-05-28-anthropic-founded/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2021-05-28"
date_precision: day
category: business
importance: 3
confidence: medium
status: [Partly confirmed]
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2021-05-28-anthropic-founded/

# Anthropic launches with a focus on AI safety

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

## What happened

Anthropic emerged publicly with its first funding round and a research agenda centered on safety.

## Why it matters

Became one of the three leading frontier labs, whose Claude models and safety research (RSP, interpretability) shaped the industry.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Anthropic raises $124 million (Anthropic)](https://www.anthropic.com/news/anthropic-raises-124-million-to-build-more-reliable-general-ai-systems) (anthropic.com, official)
2. [Wikipedia: Anthropic](https://en.wikipedia.org/wiki/Anthropic) (en.wikipedia.org, discussion)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2023-03-14: [Anthropic releases Claude](https://postcutoff.com/e/2023-03-14-claude-1/index.md)
- 2022-12-15: [Anthropic introduces Constitutional AI (RLAIF)](https://postcutoff.com/e/2022-12-15-constitutional-ai/index.md)
- People: [Dario Amodei](https://postcutoff.com/person/dario-amodei/), [Daniela Amodei](https://postcutoff.com/person/daniela-amodei/)