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OpenAI: o3 Pro: AI model

o3 Pro is a variant of the o-series that uses more compute to think harder for more consistent reasoning, with text, image and file input and a 200K-token context window. Reachable from inside Iran through Hormouz.

Context window:
200,000 tokens
Input:
$20/1M tokens
Output:
$80/1M tokens
Type:
text, image
  • Vision
  • Tools
  • Streaming
  • Long context

Thinking levels:

The o-series is trained with reinforcement learning to reason before answering and solve complex problems. The o3 Pro variant uses more compute to think harder and provide consistently better answers.

It accepts text, image and file input, supports tool calling and offers a context window of up to 200K tokens. A fit for hard reasoning problems in math, science and engineering where quality is the priority. Hormouz exposes an OpenAI-compatible API. Point your base URL at Hormouz, drop in a Hormouz key, and existing OpenAI SDK code runs unchanged.

Pricing is usage-based: $20/M in · $80/M out. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.

The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently...

Quickstart

curl https://api.hormouz.net/v1/chat/completions \
  -H "Authorization: Bearer ng-YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/o3-pro",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Specs

VendorOpenAI
TypeText, Image
Context window200,000 tokens
Pricing$20.00/M in · $80.00/M out
APIChat Completions
CapabilitiesStreaming · Vision · Tools

Benchmarks

Reasoning

GPQA Diamond
Graduate-level scientific reasoning
84.5%

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/o3-pro",
    "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/o3-pro",
    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/o3-pro",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Buy the OpenAI: o3 Pro API, paid in rial

  • Buy credit with an Iranian bank card; no foreign card or account needed.
  • One Hormouz key reaches OpenAI: o3 Pro 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 ChatGPT (OpenAI) API access, paid in rial

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FAQ

How much does o3 Pro cost?
Billing is usage-based: $20/M in · $80/M out. There is no fixed monthly fee. You pay only for what you use.
How do I use o3 Pro from inside Iran?
Create a Hormouz account and generate an API key. Hormouz gives you a stable route to the model from inside Iran, with no foreign credit card or circumvention tooling needed.
Is o3 Pro OpenAI-compatible?
Yes. Hormouz serves an OpenAI-compatible API. Point your base URL at Hormouz and swap in a Hormouz key; your existing SDKs and code work without a rewrite.
How does o3 Pro differ from typical models?
It reasons before answering and spends more compute to give more accurate, consistent answers on hard problems.
Does o3 Pro support tool calling?
Yes. It supports tool calling and accepts text, image and file input.
What is o3 Pro good for?
Complex reasoning problems in math, science and engineering where answer quality matters more than speed.

Updated 2026-10-13