Struct Generation 

pub struct Generation {
    pub model: String,
    pub provider: String,
    pub model_parameters: HashMap<String, Value>,
    pub usage: TokenUsage,
    pub cost: Option<CostDetails>,
    pub completion_start_time: Option<SystemTime>,
    pub finish_reason: Option<String>,
    pub prompt_name: Option<String>,
    pub prompt_version: Option<u32>,
}

LLM-specific data carried on a Generation span.

Fields

model: String

Concrete model id (e.g. “gpt-4o-2024-08-06”).

provider: String

Provider tag (e.g. “openai”, “anthropic”).

model_parameters: HashMap<String, Value>

Provider-supplied request parameters (temperature, max_tokens, …).

usage: TokenUsage

Token usage broken out by category.

cost: Option<CostDetails>

USD cost, structured. None when the model is not in the price table.

completion_start_time: Option<SystemTime>

Time-to-first-token, when the provider reports it.

finish_reason: Option<String>

Provider’s stop reason (“stop”, “length”, “tool_calls”, …).

prompt_name: Option<String>

Set when the prompt came from a PromptStore.

prompt_version: Option<u32>

Set when the prompt came from a PromptStore.

Trait Implementations

impl Clone for Generation

fn clone(&self) -> Generation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Generation

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

Formats the value using the given formatter.

impl Default for Generation

fn default() -> Generation

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Generation

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Generation

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

where __S: Serializer,

Serialize this value into the given Serde serializer.