Struct LlmUsage 

pub struct LlmUsage {
    pub input_tokens: u64,
    pub output_tokens: u64,
    pub model: String,
    pub provider: String,
    pub cost_usd: Option<f64>,
    pub latency_ms: u64,
}

Token usage and cost data for a single LLM call.

Fields

input_tokens: u64

Number of prompt/input tokens consumed.

output_tokens: u64

Number of completion/output tokens generated.

model: String

Model identifier (e.g. "gpt-4o", "claude-sonnet-4-5").

provider: String

Provider name (e.g. "openrouter", "anthropic").

cost_usd: Option<f64>

Calculated cost in USD, if pricing data was available.

latency_ms: u64

End-to-end request latency in milliseconds.

Implementations

impl LlmUsage

pub fn total_tokens(&self) -> u64

Returns the sum of input and output tokens.

pub fn with_cost(self, cost_usd: f64) -> LlmUsage

Attaches a cost figure and returns the updated value.

Trait Implementations

impl Clone for LlmUsage

fn clone(&self) -> LlmUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LlmUsage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LlmUsage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for LlmUsage

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.