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List evals

Documents the GET /evals endpoint for listing evaluations, including query parameters, response structure, and grader types.

May 2, 2026
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What this file does

Documents the GET /evals endpoint for listing evaluations, including query parameters, response structure, and grader types.

When to use it

  • Building a client that fetches evaluation lists from the OpenAI API
  • Understanding pagination options for eval endpoints
  • Reviewing the data source configs and grader types available in evals
  • Writing integration tests that call the list evals endpoint

Assumes this stack

OpenAI APIRESTJSON

List

get /evals

List evaluations for a project.

Query Parameters

  • after: optional string

    Identifier for the last eval from the previous pagination request.

  • limit: optional number

    Number of evals to retrieve.

  • order: optional "asc" or "desc"

    Sort order for evals by timestamp. Use asc for ascending order or desc for descending order.

    • "asc"

    • "desc"

  • order_by: optional "created_at" or "updated_at"

    Evals can be ordered by creation time or last updated time. Use created_at for creation time or updated_at for last updated time.

    • "created_at"

    • "updated_at"

Returns

  • data: array of object { id, created_at, data_source_config, 4 more }

    An array of eval objects.

    • id: string

      Unique identifier for the evaluation.

    • created_at: number

      The Unix timestamp (in seconds) for when the eval was created.

    • data_source_config: EvalCustomDataSourceConfig or object { schema, type, metadata } or EvalStoredCompletionsDataSourceConfig

      Configuration of data sources used in runs of the evaluation.

      • EvalCustomDataSourceConfig = object { schema, type }

        A CustomDataSourceConfig which specifies the schema of your item and optionally sample namespaces. The response schema defines the shape of the data that will be:

        • Used to define your testing criteria and

        • What data is required when creating a run

        • schema: map[unknown]

          The json schema for the run data source items. Learn how to build JSON schemas here.

        • type: "custom"

          The type of data source. Always custom.

          • "custom"
      • LogsDataSourceConfig = object { schema, type, metadata }

        A LogsDataSourceConfig which specifies the metadata property of your logs query. This is usually metadata like usecase=chatbot or prompt-version=v2, etc. The schema returned by this data source config is used to defined what variables are available in your evals. item and sample are both defined when using this data source config.

        • schema: map[unknown]

          The json schema for the run data source items. Learn how to build JSON schemas here.

        • type: "logs"

          The type of data source. Always logs.

          • "logs"
        • metadata: optional Metadata

          Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard.

          Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters.

      • EvalStoredCompletionsDataSourceConfig = object { schema, type, metadata }

        Deprecated in favor of LogsDataSourceConfig.

        • schema: map[unknown]

          The json schema for the run data source items. Learn how to build JSON schemas here.

        • type: "stored_completions"

          The type of data source. Always stored_completions.

          • "stored_completions"
        • metadata: optional Metadata

          Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard.

          Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters.

    • metadata: Metadata

      Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format, and querying for objects via API or the dashboard.

      Keys are strings with a maximum length of 64 characters. Values are strings with a maximum length of 512 characters.

    • name: string

      The name of the evaluation.

    • object: "eval"

      The object type.

      • "eval"
    • testing_criteria: array of LabelModelGrader or StringCheckGrader or TextSimilarityGrader or 2 more

      A list of testing criteria.

      • LabelModelGrader = object { input, labels, model, 3 more }

        A LabelModelGrader object which uses a model to assign labels to each item in the evaluation.

        • input: array of object { content, role, type }

          • content: string or ResponseInputText or object { text, type } or 3 more

            Inputs to the model - can contain template strings. Supports text, output text, input images, and input audio, either as a single item or an array of items.

            • TextInput = string

              A text input to the model.

            • ResponseInputText = object { text, type }

              A text input to the model.

              • text: string

                The text input to the model.

              • type: "input_text"

                The type of the input item. Always input_text.

                • "input_text"
            • OutputText = object { text, type }

              A text output from the model.

              • text: string

                The text output from the model.

              • type: "output_text"

                The type of the output text. Always output_text.

                • "output_text"
            • InputImage = object { image_url, type, detail }

              An image input block used within EvalItem content arrays.

              • image_url: string

                The URL of the image input.

              • type: "input_image"

                The type of the image input. Always input_image.

                • "input_image"
              • detail: optional string

                The detail level of the image to be sent to the model. One of high, low, or auto. Defaults to auto.

            • ResponseInputAudio = object { input_audio, type }

              An audio input to the model.

              • input_audio: object { data, format }

                • data: string

                  Base64-encoded audio data.

                • format: "mp3" or "wav"

                  The format of the audio data. Currently supported formats are mp3 and wav.

                  • "mp3"

                  • "wav"

              • type: "input_audio"

                The type of the input item. Always input_audio.

                • "input_audio"
            • GraderInputs = array of string or ResponseInputText or object { text, type } or 2 more

              A list of inputs, each of which may be either an input text, output text, input image, or input audio object.

              • TextInput = string

                A text input to the model.

              • ResponseInputText = object { text, type }

                A text input to the model.

                • text: string

                  The text input to the model.

                • type: "input_text"

                  The type of the input item. Always input_text.

                  • "input_text"
              • OutputText = object { text, type }

                A text output from the model.

                • text: string

                  The text output from the model.

                • type: "output_text"

                  The type of the output text. Always output_text.

                  • "output_text"
              • InputImage = object { image_url, type, detail }

                An image input block used within EvalItem content arrays.

                • image_url: string

                  The URL of the image input.

                • type: "input_image"

                  The type of the image input. Always input_image.

                  • "input_image"
                • detail: optional string

                  The detail level of the image to be sent to the model. One of high, low, or auto. Defaults to auto.

              • ResponseInputAudio = object { input_audio, type }

                An audio input to the model.

                • input_audio: object { data, format }

                  • data: string

                    Base64-encoded audio data.

                  • format: "mp3" or "wav"

                    The format of the audio data. Currently supported formats are mp3 and wav.

                    • "mp3"

                    • "wav"

                • type: "input_audio"

                  The type of the input item. Always input_audio.

                  • "input_audio"
          • role: "user" or "assistant" or "system" or "developer"

            The role of the message input. One of user, assistant, system, or developer.

            • "user"

            • "assistant"

            • "system"

            • "developer"

          • type: optional "message"

            The type of the message input. Always message.

            • "message"
        • labels: array of string

          The labels to assign to each item in the evaluation.

        • model: string

          The model to use for the evaluation. Must support structured outputs.

        • name: string

          The name of the grader.

        • passing_labels: array of string

          The labels that indicate a passing result. Must be a subset of labels.

        • type: "label_model"

          The object type, which is always label_model.

          • "label_model"
      • StringCheckGrader = object { input, name, operation, 2 more }

        A StringCheckGrader object that performs a string comparison between input and reference using a specified operation.

        • input: string

          The input text. This may include template strings.

        • name: string

          The name of the grader.

        • operation: "eq" or "ne" or "like" or "ilike"

          The string check operation to perform. One of eq, ne, like, or ilike.

          • "eq"

          • "ne"

          • "like"

          • "ilike"

        • reference: string

          The reference text. This may include template strings.

        • type: "string_check"

          The object type, which is always string_check.

          • "string_check"
      • TextSimilarityGrader = TextSimilarityGrader

        A TextSimilarityGrader object which grades text based on similarity metrics.

        • pass_threshold: number

          The threshold for the score.

      • PythonGrader = PythonGrader

        A PythonGrader object that runs a python script on the input.

        • pass_threshold: optional number

          The threshold for the score.

      • ScoreModelGrader = ScoreModelGrader

        A ScoreModelGrader object that uses a model to assign a score to the input.

        • pass_threshold: optional number

          The threshold for the score.

  • first_id: string

    The identifier of the first eval in the data array.

  • has_more: boolean

    Indicates whether there are more evals available.

  • last_id: string

    The identifier of the last eval in the data array.

  • object: "list"

    The type of this object. It is always set to "list".

    • "list"

Example

curl https://api.openai.com/v1/evals \
    -H "Authorization: Bearer $OPENAI_API_KEY"

What's inside

1 endpoint definition, 4 query parameters, 5 grader types, 3 data source configs, 1 example request

Change this for your project

  • Replace $OPENAI_API_KEY with your actual API key
  • Replace https://api.openai.com/v1/evals with your own base URL if self-hosting

Where it goes

Keep alongside your test suite. Used to define and score model evaluations.

Worth borrowing

  • Pagination via after and has_more fields for large result sets
  • Grader polymorphism with a type discriminator for extensibility

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