Struct ModelUsage 

pub struct ModelUsage {
    pub input_tokens: u32,
    pub output_tokens: u32,
    pub cache_read_input_tokens: u32,
    pub cache_creation_input_tokens: u32,
    pub web_search_requests: u32,
    pub web_fetch_requests: u32,
    pub cost_usd: f64,
    pub context_window: u32,
}

Per-model usage statistics tracking.

This tracks API usage for each model separately, enabling accurate cost attribution when multiple models are used (e.g., Haiku for tool summarization, Opus for main agent).

Fields

input_tokens: u32

Input tokens consumed by this model.

output_tokens: u32

Output tokens generated by this model.

cache_read_input_tokens: u32

Cache read tokens.

cache_creation_input_tokens: u32

Cache creation tokens.

web_search_requests: u32

Number of local web search requests made by this model.

web_fetch_requests: u32

Number of local web fetch requests made by this model.

cost_usd: f64

Estimated cost in USD for this model’s usage.

context_window: u32

Context window size for this model.

Implementations

impl ModelUsage

pub fn from_usage(usage: &Usage, model: &str) -> Self

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

pub fn add_usage(&mut self, usage: &Usage, model: &str)

pub fn total_tokens(&self) -> u32

Trait Implementations

impl Clone for ModelUsage

fn clone(&self) -> ModelUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ModelUsage

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

Formats the value using the given formatter.

impl Default for ModelUsage

fn default() -> ModelUsage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ModelUsage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ModelUsage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.