Gemini 3.5 Flash Chat Completions

Call Gemini 3.5 Flash through PixMind for multimodal understanding, tool calls, and streaming.

Gemini 3.5 Flash balances multimodal input, tool use, and response speed for visual Q&A, video understanding, and everyday agent tasks.

Gemini 3.5 Flash through PixMind's OpenAI-compatible chat completions endpoint.

Provider

Google

Model ID

gemini-3.5-flash

Endpoint

POST /api-platform/v1/chat/completions

Open model playground Create API key

Model notes

Keep the API key on your server and use streaming when the client needs incremental output.
Gemini accepts up to 10 images (10MB each) and one video (20MB) per request. Media URLs must use HTTPS.

Request parameters

Parameter	Type	Required	Description
`model`	string	Yes	Stable PixMind model ID. Use `gemini-3.5-flash`. Allowed values: `gemini-3.5-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 number of completion tokens to generate. Default: `4096`
`temperature`	number	No	Sampling temperature for the response. Allowed values: `0`, `0.5`, `1`, `2` Default: `1`
`stream`	boolean	No	Return tokens incrementally when enabled. Allowed values: `true`, `false` Default: `false`

Request example

cURL

curl https://aihub-admin.aimix.pro/api-platform/v1/chat/completions \
  -H "Authorization: Bearer $PIXMIND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gemini-3.5-flash",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "Compare the product image with the motion in the video."
        },
        {
          "type": "image_url",
          "image_url": {
            "url": "https://example.com/product.png"
          }
        },
        {
          "type": "video_url",
          "video_url": {
            "url": "https://example.com/motion.mp4"
          }
        }
      ]
    }
  ],
  "stream": false
}'

JavaScript

const response = await fetch("https://aihub-admin.aimix.pro/api-platform/v1/chat/completions", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.PIXMIND_API_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
  "model": "gemini-3.5-flash",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "Compare the product image with the motion in the video."
        },
        {
          "type": "image_url",
          "image_url": {
            "url": "https://example.com/product.png"
          }
        },
        {
          "type": "video_url",
          "video_url": {
            "url": "https://example.com/motion.mp4"
          }
        }
      ]
    }
  ],
  "stream": false
})
});

const task = await response.json();

Accepted task response

Generation is asynchronous. Save taskId and poll GET /api-platform/v1/tasks/{taskId} until status is ready or failed.

200 OK

{
  "code": 1000,
  "data": {
    "id": "img_44160",
    "taskId": 44160,
    "type": "image",
    "model": "gemini-3.5-flash",
    "status": "processing"
  }
}

API pricing

Configuration	Price
Input tokens	1346.8 credits / 1M tokens
Output tokens	8190 credits / 1M tokens
Cache read	152.88 credits / 1M tokens

API pricing uses the apiPlatform role and is separate from PixMind Studio credits. The accepted task response is the final pricing snapshot.