GPT-5.6 Terra Chat Completion

Call the balanced GPT-5.6 Terra model for reasoning, vision, tools, and streaming through the PixMind API.

GPT-5.6 Terra is the balanced production route for everyday reasoning and multimodal workloads. Its token table includes cache reads and writes, plus a separate tier for requests above 272K input tokens.

GPT-5.6 Terra through PixMind's OpenAI-compatible chat completions endpoint.

Provider

OpenAI

Model ID

gpt-5.6-terra

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.
The pricing tier is selected from the request's input-token count. Above 272K input tokens, the long-context tier applies to the entire request—not only the excess tokens. Cache reads and cache writes are billed independently.

Request parameters

Parameter	Type	Required	Description
`model`	string	Yes	Stable PixMind model ID. Use `gpt-5.6-terra`. Allowed values: `gpt-5.6-terra`
`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": "gpt-5.6-terra",
  "messages": [
    {
      "role": "user",
      "content": "Draft three launch concepts for this product."
    }
  ],
  "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": "gpt-5.6-terra",
  "messages": [
    {
      "role": "user",
      "content": "Draft three launch concepts for this product."
    }
  ],
  "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": "gpt-5.6-terra",
    "status": "processing"
  }
}

API pricing

Configuration	Price
Input · ≤272K input tokens	1477.84 credits (~$1.56) / 1M tokens
Output · ≤272K input tokens	8867.04 credits (~$9.36) / 1M tokens
Cache read · ≤272K input tokens	147.784 credits (~$0.16) / 1M tokens
Cache write · ≤272K input tokens	1847.3 credits (~$1.95) / 1M tokens
Input · >272K input tokens	2955.68 credits (~$3.12) / 1M tokens
Output · >272K input tokens	13300.56 credits (~$14.04) / 1M tokens
Cache read · >272K input tokens	295.568 credits (~$0.32) / 1M tokens
Cache write · >272K input tokens	3694.6 credits (~$3.90) / 1M tokens

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