Struct TokenUsage

pub struct TokenUsage {
    pub input: u64,
    pub output: u64,
    pub total: u64,
}

Token usage statistics for a message

Tracks the number of tokens consumed by Claude for processing input and generating output. Useful for monitoring costs and staying within limits.

Examples

let usage = TokenUsage {
    input: 150,
    output: 500,
    total: 650,
};

// Calculate approximate cost (example rates)
let input_cost = usage.input as f64 * 0.000003;  // $3/million tokens
let output_cost = usage.output as f64 * 0.000015; // $15/million tokens
let total_cost = input_cost + output_cost;

Fields

input: u64

Number of input tokens processed

output: u64

Number of output tokens generated

total: u64

Total tokens used (input + output)

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<'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.