Struct TokenUsage 

pub struct TokenUsage {
    pub input: u64,
    pub output: u64,
    pub cached_input: u64,
    pub reasoning: u64,
}

Tokens the provider reported for a call.

Zero means “not reported”: no provider distinguishes a real zero from a missing count, and a cost estimate built on a guess is worse than one built on a zero.

Fields

input: u64

Prompt tokens.

output: u64

Generated tokens.

cached_input: u64

Prompt tokens served from the provider’s cache, already counted in input.

reasoning: u64

Reasoning tokens, already counted in output where the provider bills them that way.

Implementations

impl TokenUsage

pub const fn new(input: u64, output: u64) -> Self

Usage with input and output counts only.

pub const fn none() -> Self

Nothing reported.

pub const fn with_cached_input(self, cached: u64) -> Self

Records cached prompt tokens.

pub const fn with_reasoning(self, reasoning: u64) -> Self

Records reasoning tokens.

pub const fn total(self) -> u64

Input plus output.

pub const fn is_unreported(self) -> bool

Returns true when the provider reported nothing.

Trait Implementations

impl Clone for TokenUsage

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TokenUsage

impl Debug for TokenUsage

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

Formats the value using the given formatter.

impl Default for TokenUsage

fn default() -> Self

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 Eq for TokenUsage

impl Hash for TokenUsage

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TokenUsage

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

Equality operator ==.

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

Inequality operator !=.

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.

impl StructuralPartialEq for TokenUsage