Anthropic

San Francisco, United StatesFounded 2021anthropic.com

Anthropic is a public benefit corporation. It sells the Claude models through its API and its own apps, and every current model has a published system card. None has open weights.

Flagship

Claude
Opus
5.5

Flagship

The Claude model Anthropic's docs tell most users to start with, priced at $4 and $20 per million tokens, with thinking that cannot be turned off.

Read: Claude Opus 5.5

Lineup

Measure

  1. Claude Opus 5.5

    Flagship

    Total
    Undisclosed
    Active
    Undisclosed
    Context
    1M

  2. Claude Sonnet 5.5

    Total
    Undisclosed
    Active
    Undisclosed
    Context
    1M

  3. Claude Fable 5.1

    Total
    Undisclosed
    Active
    Undisclosed
    Context
    1M

  4. Claude Haiku 4.5

    Total
    Undisclosed
    Active
    Undisclosed
    Context
    200k

Other providers