Billing resumes for some pre-output refusals

Refusals that arrive before any output are billed again when stop_details.category is bio, frontier_llm or reasoning_extraction, at the rates of the model that ran the request. Refusals in other categories stay free.

Who is affected:

Apps whose requests are refused in the bio, frontier_llm or reasoning_extraction categories.

What to do:

Check refusal volume by category in your usage data.