Anthropic

[San Francisco, California, USA][founded 2021][backed by Amazon, Google; public benefit corporation]anthropic.com

Founded in 2021 by former OpenAI researchers and headquartered in San Francisco, Anthropic is a public benefit corporation backed by Amazon and Google. The lab pursues safety-first AI research using Constitutional AI to align models with human values. Its Claude family ships in Haiku, Sonnet and Opus tiers, with the Fable tier added in June 2026 as a Mythos-class model released with additional safeguards.

sources:en.wikipedia.org/…/Anthropic en.wikipedia.org/…/Claude_(language_model)anthropic.com platform.claude.com

· verified 2026-09-13

models

family

2023–2026

shipping

■ text 5

5 models · 1 family · 2023–2026

Claude

newest: Claude Sonnet 5 · 2026-06-30

[frontier][api][Fable / Opus / Sonnet / Haiku]

Family

Claude

[frontier][api][Fable / Opus / Sonnet / Haiku]

5 in catalog · 3 earlier

before the catalog2023-03 Claude 1, first release→2024-03 Claude 3, Haiku, Sonnet and Opus tiers introduced→2024-06 Claude 3.5 Sonnet, strong coding and vision capabilities→