> ## Documentation Index
> Fetch the complete documentation index at: https://docs.coval.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# List available metric models

> Returns all LLM models available for metric evaluation, grouped by access tier.

- **standard** models are available to all organizations.
- **enterprise** models require an Enterprise plan and will return a `403
  MODEL_TIER_ACCESS_DENIED` error if used in `runtime_config` by a non-Enterprise org.

Use the `model_id` values from this response when setting `runtime_config.model_version`
on a metric.




## OpenAPI

````yaml /api-reference/v1/metrics-v1.yaml get /models/metric
openapi: 3.0.3
info:
  title: Coval Metrics API
  version: 1.0.0
  description: |
    Manage custom evaluation metrics for agent testing and monitoring.
  contact:
    name: Coval API Support
    email: support@coval.dev
    url: https://docs.coval.ai
  license:
    name: Proprietary
    url: https://coval.dev/terms
servers:
  - url: https://api.coval.dev/v1
    description: Production API
security:
  - ApiKeyAuth: []
tags:
  - name: Metrics
    description: CRUD operations for custom evaluation metrics
paths:
  /models/metric:
    get:
      tags:
        - Metrics
      summary: List available metric models
      description: >
        Returns all LLM models available for metric evaluation, grouped by
        access tier.


        - **standard** models are available to all organizations.

        - **enterprise** models require an Enterprise plan and will return a
        `403
          MODEL_TIER_ACCESS_DENIED` error if used in `runtime_config` by a non-Enterprise org.

        Use the `model_id` values from this response when setting
        `runtime_config.model_version`

        on a metric.
      operationId: listMetricModels
      responses:
        '200':
          description: List of available metric models
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListMetricModelsResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '500':
          $ref: '#/components/responses/InternalError'
components:
  schemas:
    ListMetricModelsResponse:
      type: object
      required:
        - models
      properties:
        models:
          type: array
          items:
            $ref: '#/components/schemas/MetricModelResource'
    MetricModelResource:
      type: object
      description: A single LLM model available for metric evaluation
      required:
        - model_id
        - display_name
        - provider
        - tier
        - supports_thinking
      properties:
        model_id:
          type: string
          description: Canonical colon-separated model identifier
          example: openai:gpt-4.1-mini-2025-04-14
        display_name:
          type: string
          description: Human-readable model name
          example: GPT-4.1 Mini
        provider:
          type: string
          description: Model provider
          enum:
            - openai
            - anthropic
            - google
        tier:
          type: string
          description: >-
            Access tier — standard models are available to all orgs; enterprise
            models require an Enterprise plan
          enum:
            - standard
            - enterprise
        supports_thinking:
          type: boolean
          description: >-
            Whether extended thinking / reasoning mode is supported on this
            model
    ErrorResponse:
      type: object
      required:
        - error
      properties:
        error:
          type: object
          required:
            - code
            - message
          properties:
            code:
              type: string
              enum:
                - INVALID_ARGUMENT
                - UNAUTHENTICATED
                - PERMISSION_DENIED
                - NOT_FOUND
                - ALREADY_EXISTS
                - INTERNAL
            message:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  field:
                    type: string
                    nullable: true
                  description:
                    type: string
  responses:
    Unauthorized:
      description: Authentication failed
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            error:
              code: UNAUTHENTICATED
              message: Authentication failed
              details:
                - field: X-API-Key
                  description: Invalid or missing API key
    InternalError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
          example:
            error:
              code: INTERNAL
              message: Internal server error
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key for authentication

````