Struct Usage 

pub struct Usage {
    pub input: u64,
    pub output: u64,
    pub cache_read: u64,
    pub cache_write: u64,
    pub reasoning: Option<u64>,
    pub total_tokens: Option<u64>,
    pub cost: Cost,
    pub cache_write_1h: Option<u64>,
}

Token usage and cost of one request.

Fields

input: u64

output: u64

cache_read: u64

cache_write: u64

reasoning: Option<u64>

Reasoning tokens, already included in output.

total_tokens: Option<u64>

Absent in sessions written by early pi versions.

cost: Cost

cache_write_1h: Option<u64>

Part of cacheWrite with one-hour retention; Anthropic only.

Implementations

impl Usage

pub fn combine(&self, other: &Usage) -> Usage

The sum of two usages, as pi’s combineUsage: the optional counts are present when either side has them.

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 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