Anthropic API Terms

These terms govern your use of Anthropic's API and place most of the risk on you: Anthropic can shut down or change the service at any time without notice, and its financial liability to you is capped at a small amount. By default, Anthropic may use what you submit to train its AI models — you can opt out in your account settings, but that opt-out does not apply if your content is flagged for safety review or if you give Anthropic feedback about it. All payments are non-refundable except where the terms or law specifically say otherwise.

The Anthropic API Terms establish the conditions under which users access Anthropic's Services, allocating substantial risk to users through a layered liability limitation structure: aggregate liability is capped at the greater of fees paid in the prior six months or $100, indirect and consequential damages are excluded in their entirety, and the Services are provided on an 'as is' basis with no warranties. Anthropic reserves unilateral, no-notice discretion to modify, suspend, or discontinue the Services or any user's access. Data usage rights permit Anthropic to use user Materials for model training unless users opt out via account settings, though that opt-out is overridden when Materials are flagged for safety review or when users submit Feedback. Users must represent that their Inputs carry all necessary rights, and are prohibited from using the Services to develop competing AI products, train competing models, or resell access.

As a user of the API, your submissions are used by Anthropic to train its models unless you actively opt out through your account settings — doing so is the one concrete step available to limit that use, though the opt-out does not apply when your Materials are flagged for safety review or when you submit Feedback about them. If you sign up with a work email address, your account may be linked to your employer's enterprise account and made accessible to your employer's administrator. If a dispute arises, you must pursue it exclusively in courts in San Francisco, California, and any recovery is limited to the greater of fees you paid in the prior six months or $100, with no recovery for indirect or consequential losses.