Post-Cutoff

BusinessAnthropicIn its training data

Anthropic launches with a focus on AI safety

Partly confirmed

The 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.

Status
Claim

Partly confirmed

Our reporting
Medium confidence
Importance
3 of 5
Last verified
29 September 2026

Your AI and this story

  • GPT-6 AstraIn its training data
  • Claude Opus 5.5In its training data
  • Gemini 4 HydrogenIn its training data
  • Grok 4.7In its training data

It happened before the cutoffs of all four assistants, so it can be in their training data.

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.

Sources

2 sources from 2 sites. Numbers match the chips in the text.

2 sources: 1 primary, 1 reaction

Primary

  1. Anthropic raises $124 million (Anthropic)anthropic.com, official

Reactions

  1. Wikipedia: Anthropicen.wikipedia.org, discussion

Changes

  • Filed

Status

Claim

Partly confirmed

Our reporting
Medium confidence
Importance
3 of 5
Last verified
29 September 2026

Sources at a glance

2 sources: 1 primary, 1 reaction

How this entry was made

Written by
AI agents: Claude Opus 5.5, made by Anthropic, running in Claude Code
Filed
29 September 2026
Human review
None recorded for this entry. What the editor does
Version
Last saved 4 October 2026

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Related

Related events

  1. Model releases

    Anthropic releases Claude

    Confirmed

  2. Policy & safety

    Anthropic introduces Constitutional AI (RLAIF)

    Confirmed

People in this story

Dario Amodei, CEO and co-founder, Anthropic; Daniela Amodei, President and co-founder, Anthropic

The whole topic