GPT-4.1 Nano API: toman pricing and code
openai/gpt-4.1-nano
visiontoolsjsonfilesYou are billed for the usage the request actually reported. Prices follow the market. Cached input: 7,253 toman / 1M. Web search: 2,901.25 toman / request.Pricing and top-ups
GPT-4.1 Nano example: reading an image into JSON
The example is picked from this model's own capabilities. Drop in your key and it runs as is.
# tip: a data URI works too — base64 the file and prefix it with data:image/jpeg;base64,
curl https://api.uttapen.ir/v1/chat/completions \
-H "Authorization: Bearer sk-up-…" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-4.1-nano",
"messages": [{
"role": "user",
"content": [
{"type": "text", "text": "Return only the invoice number and the total, as JSON."},
{"type": "image_url", "image_url": {"url": "https://example.com/factor.jpg"}}
]
}]
}'import base64, json
from openai import OpenAI
client = OpenAI(base_url="https://api.uttapen.ir/v1", api_key="sk-up-…")
img = base64.b64encode(open("factor.jpg", "rb").read()).decode()
resp = client.chat.completions.create(
model="openai/gpt-4.1-nano",
messages=[{
"role": "user",
"content": [
{"type": "text", "text": "Return the invoice number, the date and the total as JSON."},
{"type": "image_url", "image_url": {"url": f"data:image/jpeg;base64,{img}"}},
],
}],
response_format={"type": "json_object"},
)
print(json.loads(resp.choices[0].message.content))import OpenAI from "openai";
import { readFileSync } from "node:fs";
const client = new OpenAI({ baseURL: "https://api.uttapen.ir/v1", apiKey: "sk-up-…" });
const img = readFileSync("factor.jpg").toString("base64");
const resp = await client.chat.completions.create({
model: "openai/gpt-4.1-nano",
messages: [{
role: "user",
content: [
{ type: "text", text: "Return the invoice number, the date and the total as JSON." },
{ type: "image_url", image_url: { url: `data:image/jpeg;base64,${img}` } },
],
}],
response_format: { type: "json_object" },
});
console.log(JSON.parse(resp.choices[0].message.content));What is GPT-4.1 Nano good for?
The id for GPT-4.1 Nano in our API is "openai/gpt-4.1-nano", served from OpenAI. Context is 1,047,576 tokens; past that you have to summarise the history yourself. A single response can run to 32,768 tokens. On price it sits in the "very cheap" band — cheaper than 71 and dearer than 335 of the other paid models in the catalogue.
What it can do beyond plain text: it reads images directly, which makes it a real option for invoices, forms and screenshots; it takes files such as PDFs as input; it supports tool calling, so it can invoke your own functions with valid arguments; it returns schema-valid JSON through response_format, ready to hand to your code. All of it works through the standard parameters of the official OpenAI SDK — no custom client, no wrapper.
Pricing is 29,013 toman per 1M input tokens and 116,050 per 1M output tokens. A 1,000-word round trip on GPT-4.1 Nano lands near 189 toman. It supports cached input: repeated context is billed at 7,253 toman per 1M, which matters a lot if your system prompt is long. You are always charged for the usage the request actually reported, never for the estimate, and a failed request costs nothing.
The closest alternative with the same capabilities from a different provider is Seed-2.0-Mini: GPT-4.1 Nano works out roughly 1× more expensive, and its context window is larger. Both run on the same key and the same code, so trying the other one is a single string change.
To make the figure concrete: 100,000 toman of credit buys roughly 529 thousand-word requests on GPT-4.1 Nano, and every 1,000 toman is about 5,291 words of round trip. A job with one million input tokens and one million output tokens comes to 145,063 toman in total. Filling this model's 1,047,576-token window costs 30,393 toman on the input side alone, which is the real reason to keep conversation history short.
This id gets confused with "openai/gpt-4.1-nano:batch", because the underlying model is the same. The difference is the suffix: no suffix (the standard variant) against "batch". On a thousand-word request this variant works out 2× dearer (189 against 94 toman). On parameters, this one takes max_completion_tokens.
OpenAI has 95 models in our catalogue; the cheapest is gpt-oss-20b at 60 toman per thousand words and the dearest o1-pro at 282,872. Among the less common parameters it accepts max_completion_tokens — all through the standard request body. It does not support include_reasoning, reasoning, which most models here do, so test before switching if your code relies on them. By context size the nearest option from another provider is GLM 5.3 Flash (batch) at 1,048,575 tokens.
Good fits: high-volume work such as classification, tagging and bulk summarising, pulling text and fields out of images, agents that reach out to APIs and databases, extracting data against a fixed schema, analysing a long document or codebase in one request.
For tasks that demand low latency, GPT‑4.1 nano is the fastest and cheapest model in the GPT-4.1 series. It delivers exceptional performance at a small size with its 1 million...
Three real jobs, priced on this model
Each figure is derived from the prices above and moves when they do.
| Job | Tokens | Cost |
|---|---|---|
| One chat turn with a medium history | 1,500 in + 400 out | 90 toman |
| Summarising a ten-page document | 4,000 in + 600 out | 186 toman |
| Classifying a thousand short rows | 120,000 in + 20,000 out | 5,803 toman |
Other variants of this model
Same core model, different execution terms and different price. This page is the standard variant.
| Variant | Model id | Output / 1M | Context |
|---|---|---|---|
| batch (cheaper, slower) | openai/gpt-4.1-nano:batch | 58,025 | 1,047,576 |
Put the variant's id verbatim in the model field; nothing else in your code changes.
Frequently asked
- How do I call GPT-4.1 Nano from Iran?
- Sign up with your mobile number, top the wallet up in toman, create an API key, then in the official OpenAI SDK point base_url at https://api.uttapen.ir/v1 and set model to "openai/gpt-4.1-nano". Nothing else in your code changes.
- What does GPT-4.1 Nano cost in toman?
- 29,013 toman per 1M input tokens and 116,050 toman per 1M output tokens; a 1,000-word request is around 189 toman. You pay for the usage that request actually reported, and a failed request costs nothing.
- How much input does GPT-4.1 Nano take?
- Up to 1,047,576 tokens per request, roughly 786k words. A single answer can reach 32,768 tokens.
- Does GPT-4.1 Nano support streaming and tool calling?
- Streaming (stream=true) works on every model here. This one supports tool calling in the standard OpenAI shape. Image input is accepted through image_url, as a data URI or a public URL. Structured output through response_format works too.