Struct Usage 

pub struct Usage {
    pub input_tokens: i64,
    pub output_tokens: i64,
    pub cache_creation_input_tokens: i64,
    pub cache_read_input_tokens: i64,
}

Provider-reported token accounting for one LLM call.

All counts are in tokens; field names mirror the OpenAI-shape usage block (input/output) plus the cache-related fields the OpenRouter and Anthropic streams expose. Cost aggregators (evals/rust/src/cost.rs) read input_tokens, output_tokens, cache_creation_input_tokens, cache_read_input_tokens directly.

Fields

input_tokens: i64

output_tokens: i64

cache_creation_input_tokens: i64

cache_read_input_tokens: i64

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