---
title: "Extend Dataset Content"
method: POST
path: "/v2/datasets/extend"
tags: ["datasets"]
---

# Extend Dataset Content

`POST /v2/datasets/extend`

Extends the dataset content

## Request body

- SyntheticDatasetExtensionRequest — Request for a synthetic dataset run job.
  - `prompt_settings` PromptRunSettingsInput — Prompt run settings.
    - `logprobs` boolean
    - `top_logprobs` integer
    - `echo` boolean
    - `n` integer
    - `reasoning_effort` string
    - `verbosity` string
    - `deployment_name` string, nullable
    - `model_alias` string
    - `temperature` number, nullable
    - `max_tokens` integer
    - `stop_sequences` string[], nullable
    - `top_p` number
    - `top_k` integer
    - `frequency_penalty` number
    - `presence_penalty` number
    - `tools` object[], nullable
    - `tool_choice` union
      - string
      - OpenAIToolChoice
        - `type` string
        - `function` OpenAIFunction, required
          - `name` string, required
    - `response_format` object, nullable
    - `known_models` Model[]
      - `name` string, required
      - `alias` string, required
      - `integration` 'anthropic' | 'aws_bedrock' | 'aws_sagemaker' | 'azure' | 'custom' | 'databricks' | 'mistral' | 'nvidia' | 'openai' | 'vegas_gateway' | 'vertex_ai' | 'writer'
      - `user_role` string, nullable
      - `assistant_role` string, nullable
      - `system_supported` boolean
      - `input_modalities` ContentModality[] — Input modalities that the model can accept.
      - `alternative_names` string[] — Alternative names for the model, used for matching with various current, versioned or legacy names.
      - `input_token_limit` integer, nullable
      - `output_token_limit` integer, nullable
      - `token_limit` integer, nullable
      - `cost_by` 'tokens' | 'characters'
      - `is_chat` boolean
      - `provides_log_probs` boolean
      - `formatting_tokens` integer
      - `response_prefix_tokens` integer
      - `api_version` string, nullable
      - `legacy_mistral_prompt_format` boolean
      - `requires_max_tokens` boolean
      - `max_top_p` number, nullable
      - `params_map` RunParamsMap — Maps the internal settings parameters (left) to the serialized parameters (right) we want to send in the API requests.
        - `model` string, nullable
        - `temperature` string, nullable
        - `max_tokens` string, nullable
        - `stop_sequences` string, nullable
        - `top_p` string, nullable
        - `top_k` string, nullable
        - `frequency_penalty` string, nullable
        - `presence_penalty` string, nullable
        - `echo` string, nullable
        - `logprobs` string, nullable
        - `top_logprobs` string, nullable
        - `n` string, nullable
        - `api_version` string, nullable
        - `tools` string, nullable
        - `tool_choice` string, nullable
        - `response_format` string, nullable
        - `reasoning_effort` string, nullable
        - `verbosity` string, nullable
        - `deployment_name` string, nullable
      - `output_map` OutputMap
        - `response` string, required
        - `token_count` string, nullable
        - `input_token_count` string, nullable
        - `output_token_count` string, nullable
        - `completion_reason` string, nullable
      - `input_map` InputMap
        - `prompt` string, required
        - `prefix` string
        - `suffix` string
  - `prompt` string, nullable
  - `instructions` string, nullable
  - `examples` string[]
  - `source_dataset` SyntheticDataSourceDataset — Configuration for dataset examples in synthetic data generation.
    - `dataset_id` string, uuid4, required
    - `dataset_version_index` integer, nullable
    - `row_ids` string[], nullable
  - `data_types` SyntheticDataTypes[], nullable
  - `count` integer
  - `project_id` string, uuid4, nullable

## Response `200`

Successful Response

- SyntheticDatasetExtensionResponse — Response for synthetic dataset extension requests.
  - `dataset_id` string, uuid4, required

## Other responses

- `422` — Validation Error

---

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