Struct Usage 

pub struct Usage {
    pub prompt_tokens: Option<i32>,
    pub completion_tokens: Option<i32>,
    pub total_tokens: Option<i32>,
}

Token usage metadata from the AI response.

Fields are optional because providers do not all report the same counters, and streaming responses only include usage on the final event.

Fields

prompt_tokens: Option<i32>

Tokens consumed by the prompt (input tokens).

completion_tokens: Option<i32>

Tokens produced by the model (output tokens).

total_tokens: Option<i32>

Prompt plus completion 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 Default for Usage

fn default() -> Usage

Returns the “default value” for a type.

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 PartialEq for Usage

fn eq(&self, other: &Usage) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

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.

impl StructuralPartialEq for Usage