Claude Fable 5 Chat Completion

Call Claude Fable 5 through PixMind with documented request parameters and token pricing.

Claude Fable 5 is available through the PixMind chat-completions API. Pricing separates input, output, cache reads, and cache writes with 5-minute and 1-hour TTLs.

Claude Fable 5 through PixMind's OpenAI-compatible chat completions endpoint.

Provider

Anthropic

Model ID

claude-fable-5

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.
Claude 5 and 4.8 use adaptive thinking. Set output_config.effort to low, medium, high, xhigh, or max; reasoning_effort is accepted as an OpenAI-compatible alias.
Changing thinking or effort starts a new prompt-cache prefix. Thinking tokens are billed as output tokens.

Request parameters

Parameter	Type	Required	Description
`model`	string	Yes	Stable PixMind model ID. Use `claude-fable-5`. Allowed values: `claude-fable-5`
`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`
`thinking`	object	No	Claude thinking mode. Use {"type":"adaptive"}. Default: `{"type":"adaptive"}`
`output_config`	object	No	Thinking depth, for example {"effort":"high"}. Default: `{"effort":"high"}`
`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": "claude-fable-5",
  "messages": [
    {
      "role": "user",
      "content": "Draft three launch concepts for this product."
    }
  ],
  "thinking": {
    "type": "adaptive"
  },
  "output_config": {
    "effort": "high"
  },
  "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": "claude-fable-5",
  "messages": [
    {
      "role": "user",
      "content": "Draft three launch concepts for this product."
    }
  ],
  "thinking": {
    "type": "adaptive"
  },
  "output_config": {
    "effort": "high"
  },
  "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": "claude-fable-5",
    "status": "processing"
  }
}

API pricing

Configuration	Price
Input tokens	7644 credits / 1M tokens
Output tokens	38220 credits / 1M tokens
Cache read	764.4 credits / 1M tokens
Cache write · 5-minute TTL	9555 credits / 1M tokens
Cache write · 1-hour TTL	15288 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.