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

# Get evaluations compare

> Requires scopes: eval:read



## OpenAPI

````yaml /api-reference/openapi.json get /api/evaluations/{id}/auto-sessions/{sessionId}/experiments/compare
openapi: 3.1.0
info:
  title: EvalGate API
  version: 3.7.6
  description: EvalGate API. See docs/api-contract.md for stability commitments.
servers:
  - url: https://evalgate.com
    description: Production
  - url: http://localhost:3000
    description: Local
security: []
paths:
  /api/evaluations/{id}/auto-sessions/{sessionId}/experiments/compare:
    get:
      tags:
        - evaluations
      summary: Get evaluations compare
      description: 'Requires scopes: eval:read'
      operationId: get_evaluations_id_auto_sessions_sessionId_experiments_compare
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: integer
        - name: sessionId
          in: path
          required: true
          schema:
            type: string
        - name: exp1
          in: query
          required: false
          schema:
            type: string
        - name: exp2
          in: query
          required: false
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/GetApiEvaluationsIdAutoSessionsSessionIdExperimentsCompareResponse200ApplicationJson
        '400':
          $ref: '#/components/responses/ValidationError'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '409':
          $ref: '#/components/responses/Conflict'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/InternalError'
      security:
        - bearerAuth:
            - eval:read
components:
  schemas:
    GetApiEvaluationsIdAutoSessionsSessionIdExperimentsCompareResponse200ApplicationJson:
      type: object
      properties:
        comparison:
          type: object
          properties:
            experiment1:
              type: object
              properties:
                id:
                  type: string
                sessionId:
                  type: string
                iteration:
                  type: number
                strategyTrack:
                  type: string
                candidatePatch:
                  oneOf:
                    - type: 'null'
                    - type: string
                utilityScore:
                  oneOf:
                    - type: 'null'
                    - type: number
                objectiveReduction:
                  oneOf:
                    - type: 'null'
                    - type: number
                regressions:
                  oneOf:
                    - type: 'null'
                    - type: number
                improvements:
                  oneOf:
                    - type: 'null'
                    - type: number
                decision:
                  oneOf:
                    - type: 'null'
                    - type: string
                hardVetoReason:
                  oneOf:
                    - type: 'null'
                    - type: string
                reflection:
                  oneOf:
                    - type: 'null'
                    - type: string
                detailsJson:
                  oneOf:
                    - type: 'null'
                    - type: string
                rejectionSource:
                  oneOf:
                    - type: 'null'
                    - type: string
                rejectionReason:
                  oneOf:
                    - type: 'null'
                    - type: string
                createdAt:
                  type: string
                  format: date-time
              additionalProperties: false
              required:
                - id
                - sessionId
                - iteration
                - strategyTrack
                - candidatePatch
                - utilityScore
                - objectiveReduction
                - regressions
                - improvements
                - decision
                - hardVetoReason
                - reflection
                - detailsJson
                - rejectionSource
                - rejectionReason
                - createdAt
            experiment2:
              type: object
              properties:
                id:
                  type: string
                sessionId:
                  type: string
                iteration:
                  type: number
                strategyTrack:
                  type: string
                candidatePatch:
                  oneOf:
                    - type: 'null'
                    - type: string
                utilityScore:
                  oneOf:
                    - type: 'null'
                    - type: number
                objectiveReduction:
                  oneOf:
                    - type: 'null'
                    - type: number
                regressions:
                  oneOf:
                    - type: 'null'
                    - type: number
                improvements:
                  oneOf:
                    - type: 'null'
                    - type: number
                decision:
                  oneOf:
                    - type: 'null'
                    - type: string
                hardVetoReason:
                  oneOf:
                    - type: 'null'
                    - type: string
                reflection:
                  oneOf:
                    - type: 'null'
                    - type: string
                detailsJson:
                  oneOf:
                    - type: 'null'
                    - type: string
                rejectionSource:
                  oneOf:
                    - type: 'null'
                    - type: string
                rejectionReason:
                  oneOf:
                    - type: 'null'
                    - type: string
                createdAt:
                  type: string
                  format: date-time
              additionalProperties: false
              required:
                - id
                - sessionId
                - iteration
                - strategyTrack
                - candidatePatch
                - utilityScore
                - objectiveReduction
                - regressions
                - improvements
                - decision
                - hardVetoReason
                - reflection
                - detailsJson
                - rejectionSource
                - rejectionReason
                - createdAt
            deltas:
              type: object
              properties:
                utilityScore:
                  oneOf:
                    - type: 'null'
                    - type: number
                objectiveReduction:
                  oneOf:
                    - type: 'null'
                    - type: number
                regressions:
                  oneOf:
                    - type: 'null'
                    - type: number
                improvements:
                  oneOf:
                    - type: 'null'
                    - type: number
              additionalProperties: false
              required:
                - utilityScore
                - objectiveReduction
                - regressions
                - improvements
          additionalProperties: false
          required:
            - experiment1
            - experiment2
            - deltas
      additionalProperties: false
      required:
        - comparison
    ApiError:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - UNAUTHORIZED
                - FORBIDDEN
                - NOT_FOUND
                - VALIDATION_ERROR
                - RATE_LIMITED
                - CONFLICT
                - INTERNAL_ERROR
                - SERVICE_UNAVAILABLE
                - QUOTA_EXCEEDED
                - NO_ORG_MEMBERSHIP
                - CROSS_ORG_REFERENCE
                - INCOMPLETE
                - MALFORMED
            message:
              type: string
            details: {}
            requestId:
              type: string
              format: uuid
          required:
            - code
            - message
      required:
        - error
  responses:
    ValidationError:
      description: Validation error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Unauthorized:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Forbidden:
      description: Forbidden
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Conflict:
      description: Conflict
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    RateLimited:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    InternalError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key or Session Token

````