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

# Create LLM

> Provision a new UponAI large language model configuration.



## OpenAPI

````yaml /openapi.json post /api/llms
openapi: 3.1.0
info:
  title: UponAI Platform API
  version: '2026-04-20'
  description: >-
    Programmatic control plane for configuring UponAI agents, LLM
    configurations, conversation flows, knowledge bases, calls, chats, voices,
    and test tooling. All endpoints require a bearer token obtained from your
    profile settings.
servers:
  - url: https://api.upon-ai.com
    description: Production
security:
  - bearerAuth: []
tags:
  - name: Calls
    description: Initiate and manage UponAI powered voice and web calls.
  - name: Agents
    description: Configure agents that power calls and web sessions.
  - name: LLM Models
    description: Manage reusable large language model configurations for agents.
  - name: Chat Agents
    description: Configure agents for browser and messaging chat sessions.
  - name: Chats
    description: Start and manage live chat sessions.
  - name: Conversation Flows
    description: Build and maintain reusable dialog graphs for agents.
  - name: Knowledge Bases
    description: Store and curate grounded knowledge sources.
  - name: Voices
    description: Discover, search, add, and clone speech synthesis voices.
  - name: Test Case Definitions
    description: Define simulation test cases for response engines.
  - name: Test Runs
    description: Retrieve results for individual and batch test runs.
  - name: Account
    description: Account level utilities and limits.
  - name: Phone Numbers
    description: List and assign phone numbers to agents.
paths:
  /api/llms:
    post:
      tags:
        - LLM Models
      summary: Create LLM
      description: Provision a new UponAI large language model configuration.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateLlmRequest'
            examples:
              default:
                value:
                  workspaceId: 42
                  display_name: Concierge with cold transfer
                  model: gpt-4o-mini
                  general_prompt: >-
                    You are the voice of UponAI. Help callers and transfer them
                    when needed.
                  begin_message: Hi there! Thanks for calling.
                  responsiveness: fast
                  general_tools:
                    - type: transfer_call
                      name: transfer_to_support
                      description: >-
                        Transfer the caller to support when they ask for a
                        human.
                      transfer_destination:
                        type: predefined
                        number: '+18885551212'
                      transfer_option:
                        type: cold_transfer
                        cold_transfer_mode: sip_invite
                        show_transferee_as_caller: false
      responses:
        '201':
          description: Newly created LLM configuration.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Llm'
              examples:
                default:
                  value:
                    llm_id: llm_1ab234cde567fgh
                    display_name: Concierge v2
                    version: 1
                    model: gpt-4o-mini
                    general_prompt: You are the voice of UponAI...
                    begin_message: Hi there! Thanks for calling UponAI.
                    updated_at: '2025-02-08T17:21:34.000Z'
components:
  schemas:
    CreateLlmRequest:
      type: object
      required:
        - workspaceId
        - display_name
      properties:
        workspaceId:
          type: integer
        display_name:
          type: string
        model:
          type: string
        general_prompt:
          type: string
        begin_message:
          type: string
          nullable: true
        responsiveness:
          type: string
        general_tools:
          type: array
          items:
            $ref: '#/components/schemas/Tool'
    Llm:
      allOf:
        - $ref: '#/components/schemas/LlmSummary'
        - type: object
          properties:
            model:
              type: string
            general_prompt:
              type: string
              nullable: true
            begin_message:
              type: string
              nullable: true
            responsiveness:
              type: string
              nullable: true
            general_tools:
              type: array
              items:
                $ref: '#/components/schemas/Tool'
            updated_at:
              type: string
              format: date-time
              nullable: true
    Tool:
      type: object
      required:
        - name
        - type
      properties:
        name:
          type: string
        description:
          type: string
        type:
          type: string
    LlmSummary:
      type: object
      required:
        - llm_id
        - display_name
        - version
      properties:
        llm_id:
          type: string
        display_name:
          type: string
        version:
          type: integer
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: Generate tokens from your profile settings at app.uponai.com.

````