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GPT via the Evrona gateway

ChatGPT API: GPT models over the OpenAI API format

Whether you call it the ChatGPT API, the GPT API or the OpenAI API, what you're after is programmatic access to GPT models. Evrona provides it through its own gateway in the OpenAI API format, so existing OpenAI SDK code runs after you swap the base URL and key — and the same Evrona key covers the whole catalog.

You don't need an OpenAI platform account or a foreign card; the balance is prepaid in rubles with a top-up code. Below are the OpenAI models Evrona currently serves — GPT text models, Codex for code and image models — with prices, key setup and a sample request.

You reach ChatGPT models through the Evrona gateway. This is not an official ChatGPT page: Evrona is an independent OpenAI-compatible gateway with its own key, balance and pricing.

Get an API keyBrowse the catalog

ChatGPT models on Evrona and their prices

Every model here has an openai/ Model ID from the Evrona catalog. Text models are priced per million input and output tokens; other types show the unit the catalog uses. Put the Model ID into the model field.

Model and Model IDTypeInput, per 1M tokensOutput, per 1M tokens
GPT-6 Astraopenai/gpt-6-astraConversation$0.67$2.22
GPT-5.6 Solopenai/gpt-5.6-solConversation$0.67$3.94
GPT-5.6 Terraopenai/gpt-5.6-terraConversation$0.29$1.98
GPT-5.6 Lunaopenai/gpt-5.6-lunaConversation$0.14$0.88
GPT-5.5openai/gpt-5.5Conversation$0.64$3.46
GPT-5.4openai/gpt-5.4Conversation$0.28$1.97
GPT-5.4 Miniopenai/gpt-5.4-miniConversation$0.11$0.63
GPT-5.3 Codexopenai/gpt-5.3-codexConversation$0.29$2.79
GPT Image 2.5 Sunburstopenai/gpt-image-2.5-sunburstPicture$0.08 per unit
GPT Image 2.5 Flareopenai/gpt-image-2.5-flarePicture$0.08 per unit
GPT Image 2openai/gpt-image-2Picture$1.42$8.55
Text Embedding 3 Smallopenai/text-embedding-3-smallVectors$0.04—

Accounting inside the service is in USD; EUR prices are recalculated at the current rate and may change.

How to get a ChatGPT API key

  1. Sign up

    Create an Evrona account with your email — it takes about a minute.

  2. Top up with a code

    Buy a top-up code in the store and redeem it in your dashboard. The amount lands on your prepaid balance right away.

  3. Create a key

    Create an ev-… API key in your dashboard. It works with ChatGPT models and the rest of the catalog straight away, and you can put a spending cap on it.

ChatGPT API request example

The gateway speaks the OpenAI API: set the base URL to https://evrona.ru/v1, use your Evrona key and pick a Model ID from the table. The example uses openai/gpt-6-astra.

curl

curl
curl https://evrona.ru/v1/chat/completions \
  -H "Authorization: Bearer ev-YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-6-astra",
    "messages": [
      {
        "role": "user",
        "content": "Hi! Tell me about yourself in two sentences."
      }
    ]
  }'

OpenAI SDK: Python and JavaScript

from openai import OpenAI

client = OpenAI(
    base_url="https://evrona.ru/v1",
    api_key="ev-YOUR_KEY",
)

completion = client.chat.completions.create(
    model="openai/gpt-6-astra",
    messages=[
        {
            "role": "user",
            "content": "Hi! Tell me about yourself in two sentences."
        }
    ],
)
print(completion.choices[0].message.content)

ChatGPT API pricing and payment

GPT models can differ in price several times over, so match the model to the job: mini variants for bulk calls and classification, flagship models for hard reasoning and agents, Codex for coding work. You pay for actual usage at the rates in the table, with no subscription.

  • Prepaid balance: top up first, then send requests — no subscription and no monthly fee.
  • You top up in rubles with a top-up code that you redeem in your dashboard.
  • You pay only for actual usage at the rates in the table, and every request shows up in your history.

To see what your workload would cost, try the cost calculator.

ChatGPT API FAQ

How do I get a ChatGPT API key?

Sign up for Evrona, top up with a code and create a key in the dashboard. The ev-… key accepts openai/ Model IDs and every other catalog model, so you don't need a key from OpenAI.

Are the ChatGPT API, GPT API and OpenAI API the same thing?

In practice people use all three names for one thing: calling GPT models programmatically over the OpenAI API format. A ChatGPT chat subscription isn't involved — you pay for actual usage. On Evrona that access runs through our gateway.

Is this the official OpenAI API?

No. Evrona is an independent gateway compatible with the OpenAI API, not an OpenAI service. The key, balance and pricing are Evrona's, and no OpenAI platform account is needed.

What does the ChatGPT API cost on Evrona?

Every GPT model's price is in the table and the catalog — text models separately for input and output per million tokens. Only actual usage is charged; use the cost calculator to size a budget.

How do I pay for OpenAI API access from Russia?

With your prepaid Evrona balance. Buy a top-up code for rubles, redeem it in the dashboard and the funds land immediately; GPT usage and everything else is deducted from there.

What do I change in my OpenAI SDK code?

Just the base URL and the key: use Evrona's address with /v1 and your Evrona key, then set model to an openai/ Model ID from the table. The rest of your Python or JavaScript code stays the same.

Start using ChatGPT through Evrona

Sign up, top up with a code and send your first ChatGPT request in a few minutes. The same key opens every other model in the catalog.

Get an API keyBrowse the catalog