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

# ChatGPT Compatible Endpoint

> Use the OpenAI SDK to access all chat models on Upmore through a single /v1/chat/completions endpoint.

Upmore is fully compatible with the OpenAI Chat Completions API. If you're already using the OpenAI SDK, switching to Upmore requires only a base URL change — no code rewrite needed.

## Endpoint

```
POST https://api.upmore.net/v1/chat/completions
```

## Authentication

Include your Upmore API key as a Bearer token:

```
Authorization: Bearer YOUR_API_KEY
```

## Quick example

<CodeGroup>
  ```bash cURL theme={null}
  curl https://api.upmore.net/v1/chat/completions \
    -H "Authorization: Bearer YOUR_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
      "model": "gpt-5.5",
      "messages": [
        { "role": "user", "content": "Hello!" }
      ]
    }'
  ```

  ```python Python theme={null}
  from openai import OpenAI

  client = OpenAI(
      api_key="YOUR_API_KEY",
      base_url="https://api.upmore.net/v1"
  )

  response = client.chat.completions.create(
      model="gpt-5.5",
      messages=[
          {"role": "user", "content": "Hello!"}
      ]
  )
  print(response.choices[0].message.content)
  ```

  ```javascript Node.js theme={null}
  import OpenAI from "openai";

  const client = new OpenAI({
    apiKey: "YOUR_API_KEY",
    baseURL: "https://api.upmore.net/v1",
  });

  const response = await client.chat.completions.create({
    model: "gpt-5.5",
    messages: [{ role: "user", content: "Hello!" }],
  });
  console.log(response.choices[0].message.content);
  ```
</CodeGroup>

## Supported models

| Provider  | Models                                                                                                                                                                                                                                   |
| --------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Anthropic | gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5, gpt-5.5                                                                                                                                                 |
| OpenAI    | gpt-5-4, gpt-5-3-codex, gpt-5-2, gpt-5-1, gpt-5, gpt-5-pro, gpt-5-mini, gpt-5-nano, gpt-4o, gpt-4o-mini, gpt-4-1, gpt-4                                                                                                                  |
| DeepSeek  | deepseek-v3-2-speciale, deepseek-v3-2, deepseek-v3-1-terminus, deepseek-v3-1, deepseek-v3                                                                                                                                                |
| Alibaba   | qwen3.5-397b-a17b, qwen3-coder-next, qwen3-coder, qwen3-235b-a22b, qwen3-32b, qwen3-14b, qwen2.5-72b-instruct                                                                                                                            |
| ByteDance | doubao-seed-2.0-pro, doubao-seed-2.0-code, doubao-seed-2.0-lite, doubao-seed-2.0-mini, doubao-seed-1-8-251228, doubao-seed-1-6-flash-250828, doubao-seed-1-6-251015, doubao-seed-1-6-lite-251015, doubao-seed-1-6-vision-250815, glm-4.7 |
| MiniMax   | minimax-m2.5, minimax-m2.1                                                                                                                                                                                                               |
| MoonShot  | kimi-k2.5                                                                                                                                                                                                                                |
| xAI       | grok-3, grok-3-mini, grok-4-fast-reasoning, grok-4-fast-non-reasoning, grok-4-1-fast-reasoning, grok-4-1-fast-non-reasoning                                                                                                              |
| Google    | gemini-3.1-pro-preview, gemini-3-pro-preview, gemini-3-flash-preview, gemini-2.5-pro, gemini-2.5-flash, gemini-2.0-flash                                                                                                                 |

## Features

* **Streaming** — Set `stream: true` for real-time token streaming via SSE
* **Function calling** — Use the `tools` and `tool_choice` parameters
* **JSON mode** — Set `response_format: { type: "json_object" }`
* **Multi-turn conversations** — Include full message history in `messages`