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With BYOK, model requests go directly from the sandbox to the provider using your API key. You pay the provider at their rates; Twill tracks the spend for visibility but doesn’t bill it. Sandbox compute stays covered by your plan.
BYOK is available on the Max plan. See Pricing.

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Supported providers

Configure keys in Settings → Bring Your Own Keys. Each provider takes an API key and an optional base URL (for proxies or compatible gateways):

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Behavior

  • Keys are stored encrypted and injected only into your workspace’s sandboxes.
  • If a task’s model has no key configured for its provider, the task falls back to platform credits.
  • Base URLs are scoped per provider, so you can route one provider through a gateway while others go direct.