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OpenAI: GPT-5.1-Codex-Mini: AI model

GPT-5.1 Codex Mini is an OpenAI model. A smaller, faster version of GPT-5.1 Codex for cost-efficient coding, with up to 400K-token context. Reachable from inside Iran through Hormouz.

Context window:
400,000 tokens
Input:
$0.25/1M tokens
Output:
$2/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context

Thinking levels: high · medium · low

GPT-5.1 Codex Mini is a smaller, faster version of GPT-5.1 Codex for cost-efficient coding. GPT-5.1 Codex Mini trades some capability for lower latency and cost, aimed at high-volume coding assistance. It supports a context window of up to 400K tokens, with training data through Sep 2024.

GPT-5.1 Codex Mini 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: $0.25 per million input tokens and $2 per million output tokens. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.

GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex

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-codex-mini",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorOpenAI
TypeText, Image
Context window400,000 tokens
Pricing$0.25/M in · $2.00/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

Reasoning

GPQA Diamond
Graduate-level scientific reasoning
81.3%
HLE
Humanity's Last Exam
18.5%
IFBench
Instruction-following
67.9%
AA-LCR
Long-context reasoning
66.7%
CritPt
Research-level physics reasoning
0%
AA Omniscience
Broad factual knowledge accuracy
23.2%
Non-Hallucination
Rate of avoiding fabricated answers
48.4%

Coding

Terminal-Bench Hard
Agentic coding & terminal use
33.3%

Agentic

τ²-Bench
Tool-use agents in dual-control scenarios
62.9%

Source: Artificial Analysis

Design Arena

How Design Arena works ↗
3D
Top 91%
999Elo
Win rate: 32.8%Avg time: 34.4s
ASCII Art
Top 80%
1,115Elo
Win rate: 43%Avg time: 16.2s
Code
Top 77%
1,099Elo
Win rate: 41.5%Avg time: 47.6s
Data Viz
Top 77%
1,105Elo
Win rate: 40.6%Avg time: 36.2s
Game Dev
Top 71%
1,105Elo
Win rate: 43.4%Avg time: 75.2s
SVG
Top 97%
977Elo
Win rate: 35.3%Avg time: 13.8s
UI Component
Top 77%
1,088Elo
Win rate: 41%Avg time: 35.3s
Website
Top 73%
1,117Elo
Win rate: 42.8%Avg time: 46.6s

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

Buy the OpenAI: GPT-5.1-Codex-Mini API, paid in rial

  • Buy credit with an Iranian bank card; no foreign card or account needed.
  • One Hormouz key reaches OpenAI: GPT-5.1-Codex-Mini 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-5.1 Codex Mini cost?
Billing is usage-based: $0.25 per million input tokens and $2 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-5.1 Codex Mini from inside Iran?
Create an account on Hormouz and generate an API key. Hormouz provides a stable path to GPT-5.1 Codex Mini from inside Iran, with no foreign credit card or circumvention tooling required.
Is GPT-5.1 Codex Mini 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-5.1 Codex Mini have?
GPT-5.1 Codex Mini 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 long documents, codebases and multi-turn conversations.
What is GPT-5.1 Codex Mini good for?
GPT-5.1 Codex Mini is purpose-built for coding and software engineering. Writing and refactoring code, agentic development runs, debugging and working across large codebases.
What is GPT-5.1 Codex Mini's knowledge cutoff?
GPT-5.1 Codex Mini's training data runs through Sep 2024. For information newer than that, provide the relevant context in your prompt or connect a tool that fetches live data.

Updated 2026-10-13