Struct Usage 

pub struct Usage {
    pub prompt_tokens: u32,
    pub completion_tokens: u32,
    pub total_tokens: u32,
    pub cached_tokens: Option<u32>,
    pub reasoning_tokens: Option<u32>,
}

Usage statistics for API calls

Fields

prompt_tokens: u32

Number of tokens in the prompt

completion_tokens: u32

Number of tokens in the completion

total_tokens: u32

Total number of tokens used

cached_tokens: Option<u32>

Number of cached tokens (if applicable)

reasoning_tokens: Option<u32>

Reasoning tokens (for models with reasoning capabilities)

Implementations

impl Usage

pub fn new(prompt_tokens: u32, completion_tokens: u32) -> Self

Create new usage statistics

pub fn with_cached_tokens(self, cached_tokens: u32) -> Self

Set cached tokens

pub fn with_reasoning_tokens(self, reasoning_tokens: u32) -> Self

Set reasoning tokens

pub fn effective_prompt_tokens(&self) -> u32

Get effective prompt tokens (excluding cached)

pub fn total_cost(&self) -> u32

Get total cost in tokens

Trait Implementations

impl Clone for Usage

fn clone(&self) -> Usage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Usage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Usage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Usage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.