Deploy ChatGPT on Railway Without a VPN: Step‑by‑Step Guide

ChatGPT

What is ChatGPT

ChatGPT is a natural language processing model based on artificial neural networks, developed by OpenAI. It can understand and generate natural language for conversation, translation, summarization, and more. It is one of the most advanced NLP models, trained on massive data and deep‑learning algorithms.

How ChatGPT Works

ChatGPT is built on the Transformer architecture and follows two stages: pre‑training and fine‑tuning.

Pre‑training stage: the model learns language representations from large amounts of text using a masked language modeling technique.

Fine‑tuning stage: the pretrained model is further trained on supervised data for specific tasks such as dialogue generation, using loss optimization to adjust parameters.

ChatGPT Use Cases

ChatGPT is a general‑purpose NLP model with many applications, including:

Dialogue systems (chatbots, intelligent customer service)

Machine translation

Text summarization

Question‑answering systems

Text classification (sentiment analysis, spam detection)

Register ChatGPT

Registration is straightforward and consists of the following steps:

Register a ChatGPT account.

Verify the phone number via an SMS activation platform

https://sms-activate.org/

.

Log in at

https://chat.openai.com/chat

.

Get API Token

After registration, log in to

https://platform.openai.com/

, go to the Personal section, and create a new secret key to obtain the API token.

Get Github Code

Fork the project

https://github.com/Chanzhaoyu/chatgpt-web

to your own repository.

Start Deployment

Instead of buying a server, use a cloud deployment platform. Popular options include fly.io, render.com, railway.app, and vercel.com. This guide uses railway.app.

On Railway, log in with GitHub, authorize the app, then create a new project and select “Deploy from Github repo”. Choose the

chatgpt-web

repository and click “Deploy Now”.

During deployment the image is built; logs can be viewed.

If the application fails to start because the ChatGPT API key is missing, add the environment variable

OPENAI_API_KEY

(or

OPENAI_ACCESS_TOKEN

) and optionally

PORT

(default 3002) and

AUTH_SECRET_KEY

for access control.

After adding the configuration, the application starts successfully.

Access

1. In Settings, generate a random domain and use it to access the service.

2. For a custom domain, add a CNAME record pointing to the Railway domain.

Update

When the upstream code is updated, sync the latest changes on GitHub; Railway will automatically redeploy.

About Railway

Railway provides a free tier of $5 and 500 hours per month; beyond that you need to pay or create additional accounts. The free tier is usually sufficient for personal use.