Struct LlmGenerationMetadata 

pub struct LlmGenerationMetadata {
    pub model: String,
    pub provider: Option<String>,
    pub usage: Option<TokenUsage>,
    pub duration_ms: Option<u64>,
    pub time_to_first_token_ms: Option<u64>,
    pub success: bool,
    pub error: Option<String>,
    pub finish_reasons: Option<Vec<String>>,
    pub response_id: Option<String>,
    pub retry: Option<LlmRetryInfo>,
    pub compaction: Option<LlmCompactionInfo>,
    pub request_options: Option<LlmRequestOptions>,
}

Metadata about an LLM generation

Fields

model: String

Model identifier used for generation

provider: Option<String>

Provider type (openai, anthropic, etc.)

usage: Option<TokenUsage>

Token usage statistics

duration_ms: Option<u64>

Duration of the generation in milliseconds

time_to_first_token_ms: Option<u64>

Time to first token in milliseconds (streaming latency)

success: bool

Whether the generation was successful

error: Option<String>

Error message if generation failed

finish_reasons: Option<Vec<String>>

Finish reasons from the LLM (e.g., [“stop”], [“tool_calls”]) Required for gen-ai semantic conventions

response_id: Option<String>

Unique response identifier from the LLM provider Required for gen-ai semantic conventions

retry: Option<LlmRetryInfo>

Retry information if rate limit retries occurred Contains number of retries and total wait time

compaction: Option<LlmCompactionInfo>

Compaction information if context was compressed before generation Occurs when the conversation context exceeded the model’s limit

request_options: Option<LlmRequestOptions>

Request-side driver options that were enabled for this generation.

Trait Implementations

impl Clone for LlmGenerationMetadata

fn clone(&self) -> LlmGenerationMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LlmGenerationMetadata

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LlmGenerationMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for LlmGenerationMetadata

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

where __S: Serializer,

Serialize this value into the given Serde serializer.