OpenLuxClaude Fable 5.1 API
Claude Fable 5.1 targets long-form creation and research, holding quality over very long outputs: $1.765 per million tokens — 82% below list pricing — on the OpenLux endpoint.
Pay-as-you-go rate
$1.765 / 1M tokens
-82% vs official list pricing. Billed in USD, metered per request with real-time cost in the console.
Access
One OpenLux key and the OpenAI-compatible endpoint: set base_url to https://openlux.lol/v1 and pass claude-fable-5-1 as the model.
Get started
Create a key in the console, then follow the five-minute docs for streaming, tools and error codes.
What Claude Fable 5.1 delivers
Fable is the specialist of the Claude line: book-length drafts, deep research reports and content where consistency across tens of thousands of words matters more than per-request cost.
It is the most expensive model in the text catalogue at $1.765 per 1M tokens, and worth it for output you would otherwise rewrite; for shorter creative work, Sonnet 4.5 is usually indistinguishable at a fraction of the rate.
A combined approach is typical: research and outline with cheaper models, then hand final synthesis to Fable for the pass that determines quality.
Call Claude Fable 5.1 in minutes
Every OpenLux model speaks the OpenAI protocol. Reuse your existing SDKs and replace two values: the base URL and the API key.
cURL
curl https://openlux.lol/v1/chat/completions \
-H "Authorization: Bearer $OPENLUX_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-fable-5-1",
"messages": [{"role": "user", "content": "Outline a 10-section research report on the economics of AI inference."}]
}'Python (OpenAI SDK)
from openai import OpenAI
client = OpenAI(
api_key="sk-openlux-...",
base_url="https://openlux.lol/v1",
)
resp = client.chat.completions.create(
model="claude-fable-5-1",
messages=[{"role": "user", "content": "Outline a 10-section research report on the economics of AI inference."}],
)
print(resp.choices[0].message.content)Node.js (OpenAI SDK)
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.OPENLUX_API_KEY,
baseURL: "https://openlux.lol/v1",
});
const resp = await client.chat.completions.create({
model: "claude-fable-5-1",
messages: [{ role: "user", content: "Outline a 10-section research report on the economics of AI inference." }],
});
console.log(resp.choices[0].message.content);Where Claude Fable 5.1 fits
Long-form consistency
Keeps voice, facts and structure coherent across very long outputs.
Research synthesis
Merges many sources into a single argued narrative without losing detail.
Style control
Follows detailed style guides and editorial instructions closely.
Tools and vision
Function calling and image input for research workflows that gather their own material.
Reports and whitepapers
Long structured documents where consistency beats per-word economics.
Editorial drafting
First drafts of long articles and chapters that need a strong through-line.
Research pipelines
Synthesis stages that convert many sources into one coherent document.
How claude-fable-5-1 is priced on OpenLux
Claude Fable 5.1 is metered pay as you go at $1.765 / 1M tokens (-82% vs official rates). There is no subscription requirement for API access: top up a balance, call the model, and see the cost of every request in the console.
| Model | Provider | Rate | Discount |
|---|---|---|---|
| claude-fable-5-1 (this model) | Anthropic | $1.765 / 1M tokens | -82% |
| claude-opus-5 | Anthropic | $0.4412 / 1M tokens | -91% |
| claude-sonnet-4-5-20250929 | Anthropic | $0.2647 / 1M tokens | -91% |
| gpt-6-astra | OpenAI | $0.3677 / 1M tokens | -96% |
Rates follow official provider pricing and are shown in USD. See the full model catalogue and pricing plans for credit allowances.
Claude Fable 5.1 questions
How much does Claude Fable 5.1 cost on OpenLux?
$1.765 per 1 million tokens, 82% below list pricing — the premium tier of the catalogue, metered pay as you go.
How do I call Claude Fable 5.1?
The same way as every other model: base_url https://openlux.lol/v1 with "model": "claude-fable-5-1" on /v1/chat/completions, using your OpenLux key.
When is Fable worth the premium?
When consistency over very long outputs is the requirement: reports, books and research synthesis you would otherwise rewrite. For shorter work, Sonnet 4.5 or GPT-6 Astra deliver comparable quality at a fraction of the cost.
Does Fable support vision and tools?
Yes — image input and function calling are supported on the same OpenAI-compatible endpoint.
Start calling Claude Fable 5.1 today
Create an OpenLux key and send your first request in minutes. Compare Claude Fable 5.1 with the rest of the catalogue on the same endpoint and the same bill.