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OpenAI: GPT-5.5 (batch): AI model

Context window:
1,050,000 tokens
Input:
$2.5/1M tokens
Output:
$15/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context

Thinking levels: xhigh · high · medium · low · none

OpenAI: GPT-5.5 (batch) is a AI model from OpenAI, available through Hormouz via an OpenAI-compatible API with stable access from inside Iran.

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...

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-5.5:batch",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorOpenAI
TypeText, Image
Context window1,050,000 tokens
Pricing$2.50/M in · $15.00/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

56.5
Coding Index
Better than 64% of models we compared

Reasoning

GPQA Diamond
Graduate-level scientific reasoning
76.8%
HLE
Humanity's Last Exam
13.7%
IFBench
Instruction-following
46.1%
AA-LCR
Long-context reasoning
64%
CritPt
Research-level physics reasoning
1.4%
AA Omniscience
Broad factual knowledge accuracy
45.6%
Non-Hallucination
Rate of avoiding fabricated answers
7.3%

Coding

Terminal-Bench Hard
Agentic coding & terminal use
49.2%

Agentic

τ²-Bench
Tool-use agents in dual-control scenarios
69.3%
GDPval
Economically valuable tasks
23.6%

Source: Artificial Analysis

Ranking distribution

First
41,009
Second
42,123
Third
8,182
Fourth
4,332

16356 tournaments ?

Agentic Game Dev
Top 62%
1,179Elo
Win rate: 52.4%
Agentic HTML Slides
Top 89%
1,084Elo
Win rate: 34.2%
Agentic Slides
Top 67%
1,150Elo
Win rate: 43.5%
Agentic Slides (HTML)
Top 89%
1,077Elo
Win rate: 33.2%
Agentic Slides (Python)
Top 67%
1,155Elo
Win rate: 45.2%
Android Native
Top 51%
1,177Elo
Win rate: 50.9%
Full-Stack
Top 68%
1,088Elo
Win rate: 43%
Godot Game Dev
Top 50%
1,173Elo
Win rate: 52.3%
HTML Slides
Top 96%
1,067Elo
Win rate: 35.6%Avg time: 228s
Mobile Apps
Top 67%
1,139Elo
Win rate: 50.4%
PPTX Slides
Top 75%
1,157Elo
Win rate: 45.3%
Python Slides
Top 75%
1,152Elo
Win rate: 43.3%Avg time: 271s
Web Apps
Top 79%
1,110Elo
Win rate: 42.6%
3D
Top 34%
1,208Elo
Win rate: 50%Avg time: 137s
ASCII Art
Top 17%
1,265Elo
Win rate: 58.8%Avg time: 60.0s
Code
Top 21%
1,266Elo
Win rate: 53.6%Avg time: 142s
Data Viz
Top 18%
1,272Elo
Win rate: 56%Avg time: 126s
Game Dev
Top 10%
1,308Elo
Win rate: 58.1%Avg time: 148s
SVG
Top 17%
1,235Elo
Win rate: 55.6%Avg time: 53.3s
UI Component
Top 23%
1,266Elo
Win rate: 53.8%Avg time: 112s
Website
Top 23%
1,263Elo
Win rate: 52.8%Avg time: 147s

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-5.5: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-5.5: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-5.5:batch",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

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Updated 2026-10-13