Anthropic is an artificial intelligence research and product company based in San Francisco. Founded in 2021, it is incorporated as Anthropic, PBC, a public benefit corporation. It develops the Claude model family and applications for individuals, developers and organizations, alongside research on model capabilities, interpretability and safety.
Products and access
Claude is available through web, desktop and mobile applications. Claude Code is an agent for software-development work, while Anthropic’s developer platform provides API access to supported models. Selected models are also offered through partner cloud platforms. Available models, features, limits and pricing vary by service and plan.
As of November 2026, Anthropic’s public model index includes Claude Opus 5.5, Sonnet 5.5 and Haiku 5.5. Its Fable and Mythos offerings have different deployment safeguards and access arrangements; Mythos 5.1 is limited to trusted-access programs and Claude Security. A model’s presence in a system-card index does not mean it is available through every account or platform.
Research and model limitations
Anthropic publishes research on alignment, interpretability, evaluations and security, together with model system cards and risk reports. In November 2026, it published work on cryptographic proofs of inference, which aim to verify that an output came from a specified model. The report describes intermediate research, rather than a general guarantee about model outputs.
The company’s October 2026 report on unintended model actions describes cases encountered in evaluations and internal use. These findings illustrate why an emphasis on safety should not be read as a guarantee of correct answers, predictable behavior or risk-free autonomous actions. Applications still require appropriate oversight, testing and controls.
Leadership and company details
Dario Amodei is co-founder and CEO. Daniela Amodei is co-founder, president and chair of the board. All seven co-founders remain active leaders, according to the company’s October 2026 securities filing. Its current leadership page also identifies executives responsible for technology, product, finance, legal, people, commercial operations, communications and global affairs.
The same filing reports approximately 5,300 employees as of September 30, 2026. Anthropic operates as a for-profit public benefit corporation, with a structure that requires it to balance shareholders’ financial interests with its stated public benefit.
Registration, languages and support
Claude’s direct consumer signup offers Google, Apple and email options. Its web and desktop interface supports English, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Brazilian Portuguese and Spanish, with Latin American and Spain variants. Interface language is distinct from the languages a model can understand or generate.
The Claude Help Center provides product and account guidance. Access and data-handling terms depend on the service, plan and region. Anthropic has published a new Supported Regions Policy scheduled to take effect on November 12, 2026; users should check the policy version applicable to their service and date of use.
