Responses

For authentication and model list, see Overview.

Endpoint

POST https://api.pipellm.ai/v1/responses

This free route accepts OpenAI Responses requests and routes only to OpenAI-compatible platforms. Cross-protocol routing for the Responses API is not available yet. If you need cross-protocol routing today, use the OpenAI Format Converter with Chat Completions.

Code Examples

cURL
Python
TypeScript

curl https://api.pipellm.ai/v1/responses \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $PIPELLM_API_KEY" \
  -d '{
    "model": "gpt-4.1",
    "input": "Write a one-sentence explanation of why the sky is blue."
  }'

import os
from openai import OpenAI

client = OpenAI(
  api_key=os.getenv("PIPELLM_API_KEY"),
  base_url="https://api.pipellm.ai/v1"
)

response = client.responses.create(
  model="gpt-4.1",
  input="Write a one-sentence explanation of why the sky is blue."
)

print(response.output_text)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.PIPELLM_API_KEY,
  baseURL: "https://api.pipellm.ai/v1",
});

const response = await client.responses.create({
  model: "gpt-4.1",
  input: "Write a one-sentence explanation of why the sky is blue.",
});

console.log(response.output_text);

Common Request Fields

Field	Type	Required	Description
`model`	string	Yes	OpenAI-compatible model ID
`input`	string or array	Yes	Text or structured input items
`instructions`	string	No	Developer or system instruction
`stream`	boolean	No	Enable streaming output
`tools`	array	No	Built-in or custom tools
`temperature`	number	No	Sampling temperature
`max_output_tokens`	integer	No	Maximum output tokens

Response Shape

{
  "id": "resp_123",
  "object": "response",
  "model": "gpt-4.1",
  "output": [
    {
      "type": "message",
      "role": "assistant",
      "content": [
        {
          "type": "output_text",
          "text": "The atmosphere scatters blue light more strongly than red light."
        }
      ]
    }
  ]
}

Routing & Protocols

Understand native route constraints

OpenAI Overview

OpenAI-compatible endpoints on PipeLLM

OpenAI Migration Guide

Official guidance on Responses vs Chat Completions

Overview

Using the API

OpenAI Compatible

Anthropic

Gemini

Endpoint

Code Examples

Common Request Fields

Response Shape

Routing & Protocols

OpenAI Overview

OpenAI Migration Guide

Overview

Using the API

OpenAI Compatible

Anthropic

Gemini

​Endpoint

​Code Examples

​Common Request Fields

​Response Shape

​Related Docs

Routing & Protocols

OpenAI Overview

OpenAI Migration Guide

Endpoint

Code Examples

Common Request Fields

Response Shape

Related Docs