Struct Usage 

pub struct Usage {
    pub prompt_tokens: u32,
    pub completion_tokens: u32,
    pub total_tokens: u32,
    pub reasoning_tokens: Option<u32>,
    pub prompt_cached_tokens: Option<u32>,
    pub prompt_cache_creation_tokens: Option<u32>,
    pub completion_reasoning_tokens: Option<u32>,
    pub prompt_tokens_details: Option<PromptTokensDetails>,
    pub completion_tokens_details: Option<CompletionTokensDetails>,
}

Usage statistics that can deserialize from both OpenAI and Anthropic formats.

OpenAI uses prompt_tokens/completion_tokens, while Anthropic uses input_tokens/output_tokens. The serde aliases allow this struct to deserialize from either format automatically.

Fields

prompt_tokens: u32

completion_tokens: u32

total_tokens: u32

reasoning_tokens: Option<u32>

prompt_cached_tokens: Option<u32>

prompt_cache_creation_tokens: Option<u32>

completion_reasoning_tokens: Option<u32>

prompt_tokens_details: Option<PromptTokensDetails>

completion_tokens_details: Option<CompletionTokensDetails>

Implementations

impl Usage

pub fn from_metrics(metrics: UsageMetrics) -> Option<Self>

Create a Usage from UsageMetrics, returning None if no metrics are present.

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 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.