Langfuse JS/TS SDKs
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    Interface ObservationsView

    interface ObservationsView {
        calculatedInputCost: null | number;
        calculatedOutputCost: null | number;
        calculatedTotalCost: null | number;
        completionStartTime: null | string;
        costDetails: Record<string, number>;
        endTime: null | string;
        environment: string;
        id: string;
        input?: unknown;
        inputPrice: null | number;
        latency: null | number;
        level: ObservationLevel;
        metadata?: unknown;
        model: null | string;
        modelId: null | string;
        modelParameters?: unknown;
        name: null | string;
        output?: unknown;
        outputPrice: null | number;
        parentObservationId: null | string;
        promptId: null | string;
        promptName: null | string;
        promptVersion: null | number;
        startTime: string;
        statusMessage: null | string;
        timeToFirstToken: null | number;
        totalPrice: null | number;
        traceId: null | string;
        type: string;
        usage: Usage;
        usageDetails: Record<string, number>;
        version: null | string;
    }

    Hierarchy (View Summary)

    Index

    Properties

    calculatedInputCost calculatedOutputCost calculatedTotalCost completionStartTime costDetails endTime environment id input? inputPrice latency level metadata? model modelId modelParameters? name output? outputPrice parentObservationId promptId promptName promptVersion startTime statusMessage timeToFirstToken totalPrice traceId type usage usageDetails version

    Properties

    calculatedInputCost: null | number

    (Deprecated. Use usageDetails and costDetails instead.) The calculated cost of the input in USD

    calculatedOutputCost: null | number

    (Deprecated. Use usageDetails and costDetails instead.) The calculated cost of the output in USD

    calculatedTotalCost: null | number

    (Deprecated. Use usageDetails and costDetails instead.) The calculated total cost in USD

    completionStartTime: null | string

    The completion start time of the observation

    costDetails: Record<string, number>

    The cost details of the observation. Key is the name of the cost metric, value is the cost in USD. The total key is the sum of all (non-total) cost metrics or the total value ingested.

    endTime: null | string

    The end time of the observation.

    environment: string

    The environment from which this observation originated. Can be any lowercase alphanumeric string with hyphens and underscores that does not start with 'langfuse'.

    id: string

    The unique identifier of the observation

    input?: unknown

    The input data of the observation

    inputPrice: null | number

    The price of the input in USD

    latency: null | number

    The latency in seconds.

    level: ObservationLevel

    The level of the observation

    metadata?: unknown

    Additional metadata of the observation

    model: null | string

    The model used for the observation

    modelId: null | string

    The unique identifier of the model

    modelParameters?: unknown

    The parameters of the model used for the observation

    name: null | string

    The name of the observation

    output?: unknown

    The output data of the observation

    outputPrice: null | number

    The price of the output in USD.

    parentObservationId: null | string

    The parent observation ID

    promptId: null | string

    The prompt ID associated with the observation

    promptName: null | string

    The name of the prompt associated with the observation

    promptVersion: null | number

    The version of the prompt associated with the observation

    startTime: string

    The start time of the observation

    statusMessage: null | string

    The status message of the observation

    timeToFirstToken: null | number

    The time to the first token in seconds

    totalPrice: null | number

    The total price in USD.

    traceId: null | string

    The trace ID associated with the observation

    type: string

    The type of the observation

    usage: Usage

    (Deprecated. Use usageDetails and costDetails instead.) The usage data of the observation

    usageDetails: Record<string, number>

    The usage details of the observation. Key is the name of the usage metric, value is the number of units consumed. The total key is the sum of all (non-total) usage metrics or the total value ingested.

    version: null | string

    The version of the observation

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