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GPT-4 Turbo Preview API: toman pricing and code

openai/gpt-4-turbo-preview

toolsjson
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Input · per 1M tokens
2,901,250 toman
Output · per 1M tokens
8,703,750 toman
One 1,000-word request ≈
15,087 toman

You are billed for the usage the request actually reported. Prices follow the market.Pricing and top-ups

GPT-4 Turbo Preview example: tool calling

The example is picked from this model's own capabilities. Drop in your key and it runs as is.

from openai import OpenAI
import json

client = OpenAI(base_url="https://api.uttapen.ir/v1", api_key="sk-up-…")

tools = [{
    "type": "function",
    "function": {
        "name": "check_stock",
        "description": "Returns the stock level of a product",
        "parameters": {
            "type": "object",
            "properties": {"sku": {"type": "string"}},
            "required": ["sku"],
        },
    },
}]

messages = [{"role": "user", "content": "How many of the Nike NK-42 shoe are in stock?"}]
first = client.chat.completions.create(model="openai/gpt-4-turbo-preview", messages=messages, tools=tools)
call = first.choices[0].message.tool_calls[0]

# you run the function yourself — the model never touches the database
args = json.loads(call.function.arguments)
result = {"sku": args["sku"], "qty": 7}

messages += [first.choices[0].message, {"role": "tool", "tool_call_id": call.id, "content": json.dumps(result)}]
final = client.chat.completions.create(model="openai/gpt-4-turbo-preview", messages=messages, tools=tools)
print(final.choices[0].message.content)

What is GPT-4 Turbo Preview good for?

GPT-4 Turbo Preview comes from OpenAI; in uttapen you reach it with the model id "openai/gpt-4-turbo-preview". It accepts up to 128,000 tokens of input per call, so a long document or several source files fit in a single request. A single response can run to 4,096 tokens. On price it sits in the "expensive" band — cheaper than 381 and dearer than 25 of the other paid models in the catalogue.

What it can do beyond plain text: 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 2,901,250 toman per 1M input tokens and 8,703,750 per 1M output tokens. A 1,000-word round trip on GPT-4 Turbo Preview lands near 15,087 toman. 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 Command R+ (08-2024): GPT-4 Turbo Preview works out roughly 3.2× more expensive, and its context window is the same size. 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 7 thousand-word requests on GPT-4 Turbo Preview, and every 1,000 toman is about 66 words of round trip. A job with one million input tokens and one million output tokens comes to 11,605,000 toman in total. Filling this model's 128,000-token window costs 371,360 toman on the input side alone, which is the real reason to keep conversation history short.

Its nearest relative in the catalogue is "openai/gpt-audio", and choosing between those two is where most people hesitate. On a thousand-word request this variant works out 3.2× dearer (15,087 against 4,715 toman). Maximum answer length differs as well: 4,096 against 16,384 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 logit_bias, logprobs, top_logprobs — 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 Nova Micro 1.0 at 128,000 tokens.

Good fits: work where the quality of the answer matters more than its cost, agents that reach out to APIs and databases, extracting data against a fixed schema.

Provider's own description

The preview GPT-4 model with improved instruction following, JSON mode, reproducible outputs, parallel function calling, and more. Training data: up to Dec 2023. **Note:** heavily rate limited by OpenAI while...

Three real jobs, priced on this model

Each figure is derived from the prices above and moves when they do.

JobTokensCost
One chat turn with a medium history1,500 in + 400 out7,833 toman
Summarising a ten-page document4,000 in + 600 out16,827 toman
Classifying a thousand short rows120,000 in + 20,000 out522,225 toman

Frequently asked

How do I call GPT-4 Turbo Preview 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-turbo-preview". Nothing else in your code changes.
What does GPT-4 Turbo Preview cost in toman?
2,901,250 toman per 1M input tokens and 8,703,750 toman per 1M output tokens; a 1,000-word request is around 15,087 toman. You pay for the usage that request actually reported, and a failed request costs nothing.
How much input does GPT-4 Turbo Preview take?
Up to 128,000 tokens per request, roughly 96k words. A single answer can reach 4,096 tokens.
Does GPT-4 Turbo Preview support streaming and tool calling?
Streaming (stream=true) works on every model here. This one supports tool calling in the standard OpenAI shape. Structured output through response_format works too.