# Use your own Anthropic key in the chat 2026-10-16 · Product > Add an Anthropic API key under Settings, Providers and keys, and pick the new anthropic-byok models in the chat. You can now save your own Anthropic API key under Settings, Providers and keys. ZeroLog checks it against Anthropic when you save it. The badge shows whether the key is verified or not. Models with the prefix `anthropic-byok/` use your key. They never switch over to the shared model pool, so a request is either answered with your key or fails with a message that the key is missing or no longer valid. The output length is capped at the limit Anthropic publishes for each model. Tool names with dots are encoded for Anthropic and decoded again in the answer. Requests that use your own provider key follow that provider's data rules, not ZeroLog's zero-data-retention promise.