NVIDIA NIM

NVIDIA NIM Completions API

Legacy OpenAI-compatible text completion endpoint (/v1/completions) for non-chat foundation models served by NIM. Accepts a raw prompt and returns generated text with the same streaming, sampling, and stopping-criterion controls as the chat endpoint.

Documentation GitHub OpenAPI

Business capability

Artificial Intelligence Management BC-610.60

Operations 1

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

POST /v1/completions Complete a raw text prompt · Create A Text Completion #

Ask an LLM

“Can I send a plain prompt string, not chat messages, and get a raw text continuation back?”

“Is it possible to get token log probabilities or echo the prompt in a text completion?”

Tell an agent

Continue the raw prompt {prompt} with the {model} model.

Complete {prompt} on {model}, generating at most {max_tokens} tokens and stopping at {stop}.

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OpenAPI Specification

openapi: 3.2.0
info:
  title: NVIDIA NIM Biology (BioNeMo) ASR Completions API
  description: NVIDIA BioNeMo NIMs for drug discovery and structural biology. Each model is a containerized microservice with its own task-specific payload but a consistent JSON contract. Includes protein structure prediction (AlphaFold2, ESMFold, OpenFold), protein generation (ProtGPT2, RFDiffusion), molecular property prediction (MolMIM), small molecule generation, and molecular docking (DiffDock).
  version: '2026-05-25'
  contact:
    name: NVIDIA Developer Support
    url: https://forums.developer.nvidia.com/c/ai-data-science/nemo-llm-service/
  license:
    name: NVIDIA AI Enterprise License
    url: https://www.nvidia.com/en-us/data-center/products/ai-enterprise/
servers:
- url: https://integrate.api.nvidia.com
  description: NVIDIA-hosted NIM endpoint
- url: http://localhost:8000
  description: Self-hosted NIM container default
security:
- BearerAuth: []
tags:
- name: Completions
  description: Legacy text completion operations
paths:
  /v1/completions:
    post:
      summary: Create A Text Completion
      description: Generate a text completion from a raw prompt against a supported NIM-served model.
      operationId: createCompletion
      tags:
      - Completions
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CompletionRequest'
      responses:
        '200':
          description: Completion response (or SSE stream when stream=true).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompletionResponse'
        '400':
          description: Invalid request.
        '401':
          description: Missing or invalid API key.
        '429':
          description: Rate limit exceeded.
components:
  schemas:
    CompletionRequest:
      type: object
      required:
      - model
      - prompt
      properties:
        model:
          type: string
        prompt:
          oneOf:
          - type: string
          - type: array
            items:
              type: string
        max_tokens:
          type: integer
          default: 1024
        temperature:
          type: number
          default: 0.2
        top_p:
          type: number
          default: 0.7
        n:
          type: integer
          default: 1
        stream:
          type: boolean
          default: false
        stop:
          oneOf:
          - type: string
          - type: array
            items:
              type: string
        seed:
          type: integer
        frequency_penalty:
          type: number
        presence_penalty:
          type: number
        echo:
          type: boolean
        logprobs:
          type: integer
    CompletionResponse:
      type: object
      properties:
        id:
          type: string
        object:
          type: string
          example: text_completion
        created:
          type: integer
        model:
          type: string
        choices:
          type: array
          items:
            type: object
            properties:
              text:
                type: string
              index:
                type: integer
              finish_reason:
                type: string
        usage:
          type: object
          properties:
            prompt_tokens:
              type: integer
            completion_tokens:
              type: integer
            total_tokens:
              type: integer
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: nvapi-...