Struct Usage 

pub struct Usage {
    pub input_tokens: u64,
    pub output_tokens: u64,
    pub cache_creation_input_tokens: u64,
    pub cache_read_input_tokens: u64,
}

Four-field token usage as returned by Anthropic API and Bedrock Converse.

Field names match Anthropic’s API; the From impls in this crate map Bedrock Converse’s camelCase names (cacheReadInputTokens, cacheWriteInputTokens -> cache_creation_input_tokens) onto these.

Fields

input_tokens: u64

Tokens in the input prompt that were not cached.

output_tokens: u64

Tokens in the model output.

cache_creation_input_tokens: u64

Tokens written to the prompt cache on this request (cache miss).

cache_read_input_tokens: u64

Tokens served from the prompt cache (cache hit).

Implementations

impl Usage

pub fn cache_hit(&self) -> bool

True when the request hit the prompt cache.

pub fn total_tokens(&self) -> u64

Total tokens billed (input + output + cache_creation + cache_read).

pub fn from_bedrock_converse( input_tokens: u64, output_tokens: u64, cache_read_input_tokens: u64, cache_write_input_tokens: u64, ) -> Self

Build a Usage from Bedrock Converse’s camelCase JSON shape.

The inputTokens field on Bedrock includes only fresh input (cache fields are reported separately), so we map them 1:1.

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 PartialEq for Usage

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Usage

impl Eq for Usage

impl StructuralPartialEq for Usage