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OpenAI: GPT-5.1 (batch): AI model

Context window:
400,000 tokens
Input:
$0.62/1M tokens
Output:
$5/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context

Thinking levels: high · medium · low · none

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

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...

Quickstart

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

Specs

VendorOpenAI
TypeText, Image
Context window400,000 tokens
Pricing$0.62/M in · $5.00/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

49.4
Coding Index
Better than 54% of models we compared

Reasoning

GPQA Diamond
Graduate-level scientific reasoning
87.3%
HLE
Humanity's Last Exam
28.5%
IFBench
Instruction-following
72.9%
AA-LCR
Long-context reasoning
80%
CritPt
Research-level physics reasoning
4.9%
AA Omniscience
Broad factual knowledge accuracy
37.7%
Non-Hallucination
Rate of avoiding fabricated answers
48.1%

Coding

Terminal-Bench Hard
Agentic coding & terminal use
45.5%

Agentic

τ²-Bench
Tool-use agents in dual-control scenarios
81.9%
GDPval
Economically valuable tasks
16.5%

Source: Artificial Analysis

Design Arena

How Design Arena works ↗
3D
Top 77%
1,071Elo
Win rate: 43.7%Avg time: 150s
ASCII Art
Top 94%
1,072Elo
Win rate: 40.2%Avg time: 37.6s
Code
Top 49%
1,177Elo
Win rate: 53%Avg time: 166s
Data Viz
Top 42%
1,203Elo
Win rate: 54.6%Avg time: 164s
Game Dev
Top 41%
1,191Elo
Win rate: 55.9%Avg time: 164s
SVG
Top 45%
1,148Elo
Win rate: 57.4%Avg time: 75.1s
UI Component
Top 55%
1,164Elo
Win rate: 52%Avg time: 142s
Website
Top 46%
1,193Elo
Win rate: 54%Avg time: 170s

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": "openai/gpt-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="openai/gpt-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: "openai/gpt-5.1:batch",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

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Updated 2026-10-13