Hormouz AIHormouzSign in

Anthropic: Claude Fable 5.1 (batch): AI model

Context window:
1,000,000 tokens
Input:
$5/1M tokens
Output:
$25/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context

Thinking levels: Always thinks · max · xhigh · high · medium · low

Anthropic: Claude Fable 5.1 (batch) is a AI model from Anthropic, available through Hormouz via an OpenAI-compatible API with stable access from inside Iran.

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

Quickstart

curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-fable-5.1:batch",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorAnthropic
TypeText, Image
Context window1,000,000 tokens
Pricing$5.00/M in · $25.00/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

53.4
Intelligence Index
Better than 97% of models we compared
81.6
Coding Index
Better than 99% of models we compared
57.9
Agentic Index
Better than 99% of models we compared

Reasoning

GPQA Diamond
Graduate-level scientific reasoning
93.7%
HLE
Humanity's Last Exam
59.1%
AA-LCR
Long-context reasoning
85.3%
CritPt
Research-level physics reasoning
29.7%
AA Omniscience
Broad factual knowledge accuracy
67.2%
Non-Hallucination
Rate of avoiding fabricated answers
27.4%

Coding

SciCode
Python for scientific computing
63.1%

Agentic

GDPval
Economically valuable tasks
62.9%

Source: Artificial Analysis

Design Arena

How Design Arena works ↗
Full-Stack
Top 2%
1,325Elo
Win rate: 57.2%
Godot Game Dev
Top 3%
1,327Elo
Win rate: 60.7%
Mobile Apps
Top 9%
1,261Elo
Win rate: 55.5%
Python Slides
Top 4%
1,328Elo
Win rate: 62.6%
Web Apps
Top 2%
1,310Elo
Win rate: 56.1%
3D
Top 2%
1,404Elo
Win rate: 67.8%Avg time: 304s
ASCII Art
Top 4%
1,333Elo
Win rate: 65%Avg time: 188s
Code
Top 3%
1,342Elo
Win rate: 59.3%Avg time: 323s
Data Viz
Top 3%
1,352Elo
Win rate: 61.8%Avg time: 243s
Game Dev
Top 1%
1,394Elo
Win rate: 65.6%Avg time: 381s
SVG
Top 5%
1,307Elo
Win rate: 57.1%Avg time: 79.5s
UI Component
Top 6%
1,345Elo
Win rate: 59.6%Avg time: 216s
Website
Top 4%
1,320Elo
Win rate: 56.3%Avg time: 323s

Metrics sourced from Design Arena

Code example

cURL
curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-fable-5.1:batch",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
Python
from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
response = client.chat.completions.create(
    model="anthropic/claude-fable-5.1:batch",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
JavaScript
import OpenAI from "openai";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const response = await client.chat.completions.create({
  model: "anthropic/claude-fable-5.1:batch",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Buy the Anthropic: Claude Fable 5.1 (batch) API, paid in rial

  • Buy credit with an Iranian bank card; no foreign card or account needed.
  • One Hormouz key reaches Anthropic: Claude Fable 5.1 (batch) and 600+ other models, and you pay only for what you use.
  • No VPN and no risk of a banned account; just change the base URL to api.hormouz.net/v1.
Create an accountBuy Claude API access, paid in rial

Use via Hormouz

Connect to this model and 600+ others with one API key, then see usage down to each request.

Request company access

Updated 2026-10-13