Struct CostMetrics 

pub struct CostMetrics {
    pub prompt_tokens: u64,
    pub completion_tokens: u64,
    pub total_tokens: u64,
    pub cost_usd: Option<f64>,
    pub latency_ms: u64,
}

Available on crate feature eval only.

Cost and latency metrics for a single evaluation turn.

Captures token usage, estimated cost, and wall-clock latency for a set of events produced during agent execution.

Fields

prompt_tokens: u64

Number of prompt/input tokens used.

completion_tokens: u64

Number of completion/output tokens generated.

total_tokens: u64

Total token count (prompt + completion).

cost_usd: Option<f64>

Estimated cost in USD (None if pricing unavailable for the model).

latency_ms: u64

Wall-clock latency in milliseconds.

Trait Implementations

impl Clone for CostMetrics

fn clone(&self) -> CostMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CostMetrics

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

Formats the value using the given formatter.

impl Default for CostMetrics

fn default() -> CostMetrics

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CostMetrics

fn deserialize<__D>( __deserializer: __D, ) -> Result<CostMetrics, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CostMetrics

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

where __S: Serializer,

Serialize this value into the given Serde serializer.