DeepSeek V4.1 Flash API

DeepSeek V4.1 Flash through PixMind's OpenAI-compatible chat completions endpoint.

Provider

DeepSeek

Model ID

deepseek-v4.1-flash

Endpoint

POST /api-platform/v1/chat/completions

Open model playground Create API key

Authentication

Base URL: https://aihub-admin.aimix.pro. Send Authorization: Bearer <PIXMIND_API_KEY> on both creation and polling requests, and Content-Type: application/json when submitting JSON. Keep your key in a server environment variable.

Model notes

Keep the API key on your server and use streaming when the client needs incremental output.
DeepSeek V4.1 Flash offers a 1M-token context window, up to 384K output tokens, image input, tool calling, and three thinking levels (low / high / max, enabled by default).

Request parameters

Parameter	Type	Required	Description
`model`	string	Yes	Stable PixMind model ID. Use `deepseek-v4.1-flash`. Allowed values: `deepseek-v4.1-flash`
`messages`	array	Yes	OpenAI-compatible chat messages. Gemini user content may be a string or an array of text, image_url, and video_url blocks.
`max_tokens`	integer	No	Maximum completion tokens; send a positive integer. The default and upper limit depend on the selected model. Playground default: `4096`
`temperature`	number	No	Sampling temperature, a number from 0 to 2 where supported. Default: `1`
`stream`	boolean	No	Return tokens incrementally when enabled. Allowed values: `true`, `false` Default: `false`

Request example

cURL

curl --request POST 'https://aihub-admin.aimix.pro/api-platform/v1/chat/completions' \
  -H "Authorization: Bearer $PIXMIND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "deepseek-v4.1-flash",
  "messages": [
    {
      "role": "user",
      "content": "Draft three launch concepts for this product."
    }
  ],
  "stream": false
}'

JavaScript

// Node.js 20+. Keep the API key on your server.
const apiKey = process.env.PIXMIND_API_KEY;
if (!apiKey) throw new Error("PIXMIND_API_KEY is required");

const response = await fetch("https://aihub-admin.aimix.pro/api-platform/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${apiKey}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
  "model": "deepseek-v4.1-flash",
  "messages": [
    {
      "role": "user",
      "content": "Draft three launch concepts for this product."
    }
  ],
  "stream": false
}),
  signal: AbortSignal.timeout(30_000)
});

const task = await response.json();
if (!response.ok) {
  throw new Error(task.message ?? task.error?.message ?? `HTTP ${response.status}`);
}
console.log(task);

Response example

Non-streaming chat completions return choices directly. With stream: true, consume the SSE stream instead.

200 OK

{
  "id": "chatcmpl_example",
  "object": "chat.completion",
  "model": "deepseek-v4.1-flash",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello!"
      },
      "finish_reason": "stop"
    }
  ]
}