Option
units of model
Where the answer of the service says what was used.
Value
A record from a unit to a dotted path into the answer, or to a fixed number for each call. Left out, only calls is counted.
Example
TypeScript
export const writer = model('writer', {
provider: 'service',
name: 'claude-sonnet-5-5',
units: { tokensIn: 'usage.input_tokens' },
})