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OpenAI: GPT-5.4 Nano: AI model

GPT-5.4 Nano is an OpenAI model. The most lightweight, cost-efficient member of the GPT-5.4 family, with up to 400K-token context. Reachable from inside Iran through Hormouz.

Context window:
400,000 tokens
Input:
$0.2/1M tokens
Output:
$1.25/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context
Good for:Popular for Academia · #6Popular for Translation · #12Ranks are based on global usage data

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

GPT-5.4 Nano is the most lightweight, cost-efficient member of the GPT-5.4 family. GPT-5.4 Nano is optimized for speed-critical, high-volume tasks. It supports text and image input and prioritizes responsiveness over deep reasoning, making it a fit for low-latency use cases and background sub-agents. It supports a context window of up to 400K tokens, with training data through Aug 2025.

GPT-5.4 Nano is served through Hormouz behind an OpenAI-compatible API. It supports tool calling, image (vision) input and step-by-step reasoning. Point your base URL at Hormouz and drop in a Hormouz key, and existing OpenAI SDK code runs unchanged.

Pricing is usage-based: $0.2 per million input tokens and $1.25 per million output tokens. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.

GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency...

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-5.4-nano",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorOpenAI
TypeText, Image
Context window400,000 tokens
Pricing$0.20/M in · $1.25/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

20.7
Intelligence Index
Better than 35% of models we compared
56.1
Coding Index
Better than 63% of models we compared
16
Agentic Index
Better than 45% of models we compared

Reasoning

GPQA Diamond
Graduate-level scientific reasoning
81.7%
HLE
Humanity's Last Exam
28.3%
IFBench
Instruction-following
75.9%
AA-LCR
Long-context reasoning
76.7%
CritPt
Research-level physics reasoning
9.3%
AA Omniscience
Broad factual knowledge accuracy
25.7%
Non-Hallucination
Rate of avoiding fabricated answers
25.8%

Coding

SciCode
Python for scientific computing
47.2%
Terminal-Bench Hard
Agentic coding & terminal use
42.4%

Agentic

τ²-Bench
Tool-use agents in dual-control scenarios
76%
GDPval
Economically valuable tasks
22.5%

Source: Artificial Analysis

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-5.4-nano",
    "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-5.4-nano",
    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-5.4-nano",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Buy the OpenAI: GPT-5.4 Nano API, paid in rial

  • Buy credit with an Iranian bank card; no foreign card or account needed.
  • One Hormouz key reaches OpenAI: GPT-5.4 Nano 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.
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FAQ

How much does GPT-5.4 Nano cost?
Billing is usage-based: $0.2 per million input tokens and $1.25 per million output tokens. There is no fixed monthly fee. You pay only for what you use, and current rates are shown in the Hormouz dashboard.
How do I access GPT-5.4 Nano from inside Iran?
Create an account on Hormouz and generate an API key. Hormouz provides a stable path to GPT-5.4 Nano from inside Iran, with no foreign credit card or circumvention tooling required.
Is GPT-5.4 Nano compatible with OpenAI code?
Yes. Hormouz exposes an OpenAI-compatible API. Just change the base URL to Hormouz and swap in your Hormouz key. Your existing SDKs and chat-completions code run without a rewrite.
What context window and capabilities does GPT-5.4 Nano have?
GPT-5.4 Nano supports a context window of up to 400K tokens. It also supports tool calling, image (vision) input and step-by-step reasoning. That makes it a good fit for classification, data extraction, ranking, sub-agent execution and real-time pipelines where cost and latency dominate.
What is GPT-5.4 Nano good for?
GPT-5.4 Nano works well for classification, data extraction, ranking, sub-agent execution and real-time pipelines where cost and latency dominate.
What is GPT-5.4 Nano's knowledge cutoff?
GPT-5.4 Nano's training data runs through Aug 2025. For information newer than that, provide the relevant context in your prompt or connect a tool that fetches live data.

Updated 2026-10-13