Struct TokenUsage 

pub struct TokenUsage {
    pub input_tokens: u32,
    pub output_tokens: u32,
    pub total_tokens: u32,
    pub estimated_cost_usd: Option<f64>,
    pub model: Option<String>,
    pub provider: Option<String>,
}

Token usage information from an LLM API call

Fields

input_tokens: u32

Number of tokens in the input/prompt

output_tokens: u32

Number of tokens in the output/completion

total_tokens: u32

Total tokens (input + output)

estimated_cost_usd: Option<f64>

Estimated cost in USD (if available)

model: Option<String>

Model used for the request

provider: Option<String>

Provider name

Implementations

impl TokenUsage

pub fn new(input_tokens: u32, output_tokens: u32) -> Self

Create a new TokenUsage with the given counts

pub fn unknown() -> Self

Create an empty/unknown token usage (for providers that don’t report usage)

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

Set the estimated cost based on provider pricing

pub fn with_model(self, model: impl Into<String>) -> Self

Set the model name

pub fn with_provider(self, provider: impl Into<String>) -> Self

Set the provider name

pub fn calculate_cost( &mut self, input_price_per_million: f64, output_price_per_million: f64, )

Calculate cost based on standard pricing (per 1M tokens)

Trait Implementations

impl Clone for TokenUsage

fn clone(&self) -> TokenUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TokenUsage

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

Formats the value using the given formatter.

impl Default for TokenUsage

fn default() -> TokenUsage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TokenUsage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for TokenUsage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.