Struct Usage 

pub struct Usage {
    pub input_tokens: Option<u64>,
    pub output_tokens: Option<u64>,
    pub reasoning_tokens: Option<u64>,
    pub cached_input_tokens: Option<u64>,
    pub total_tokens: Option<u64>,
}

Token accounting reported by a provider response.

Fields stay None when the provider did not report that exact value. The Kit does not derive aggregate totals or request counts from other fields.

Examples

let usage = providers_kit::generation::Usage {
    input_tokens: Some(12),
    output_tokens: Some(34),
    reasoning_tokens: None,
    cached_input_tokens: Some(5),
    total_tokens: Some(46),
};
assert_eq!(usage.cached_input_tokens, Some(5));
assert_eq!(usage.total_tokens, Some(46));

Fields

input_tokens: Option<u64>

Input tokens billed or counted for the request.

output_tokens: Option<u64>

Output tokens generated by the provider.

reasoning_tokens: Option<u64>

Reasoning or thinking tokens reported separately by the provider.

cached_input_tokens: Option<u64>

Input tokens served from prompt cache rather than recomputed.

total_tokens: Option<u64>

Total token count when the provider reports an aggregate value.

Trait Implementations

impl Clone for Usage

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Usage

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Usage

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Usage

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Usage

impl PartialEq for Usage

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Usage

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Usage