Struct Usage 

pub struct Usage {
    pub input_tokens: u32,
    pub output_tokens: u32,
    pub cache_read_tokens: u32,
    pub cache_write_tokens: u32,
}

Token usage from a single LLM request.

Fields

input_tokens: u32

Tokens consumed by the input prompt.

output_tokens: u32

Tokens generated in the output.

cache_read_tokens: u32

Tokens served from the prompt cache.

cache_write_tokens: u32

Tokens written into the prompt cache.

Implementations

impl Usage

pub fn total_tokens(&self) -> u32

Total tokens across input and output (excludes cache).

pub fn cost(&self, pricing: &ModelPricing) -> Cost

Calculate dollar cost given a model’s pricing.

pub fn add(&mut self, other: &Usage)

Accumulate another usage into this one.

Trait Implementations

impl Clone for Usage

fn clone(&self) -> Usage

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() -> Usage

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 PartialEq for Usage

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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 Eq for Usage

impl StructuralPartialEq for Usage