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 flagship Claude family emphasises long-context understanding, nuanced instruction-following, and steerable behaviour.

Models by Anthropic (5)

Claude Fable 5

Anthropic

Newest Claude flagship with 1M context and frontier agentic reasoning

Context Length1,000,000

Release Date2026-06-09

[text]

Show Workflow (1)

Claude Sonnet 5

Anthropic

Most agentic Sonnet yet, near-Opus 4.8 performance at a fraction of the cost (intro pricing $2/$10 through Aug 31)

Context Length1,000,000

Release Date2026-06-30

[text]

Show Workflow (1)

Claude Sonnet 4.6

Anthropic

Previous Sonnet with 1M context and advanced reasoning

Context Length1,000,000

Release Date2026-02-19

[text]

Show Workflow (1)

Claude Opus 4.8

Anthropic

Most capable Claude with 1M context and fast mode

Context Length1,000,000

Release Date2026-05-29

[text]

Show Workflow (1)

Claude Haiku 4.5

Anthropic

Sonnet-4-level coding performance at 1/3 cost and 2x speed

Context Length200,000

Release Date2025-10-15

[text]

Show Workflow (1)