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ChatRex Lite

ChatRex responds through your OpenAI account

Connect your own OpenAI API key and use it to process messages with the ChatRex bot. OpenAI expenses and the ChatRex tariff are taken into account separately, and the key remains a proprietary secret

Try for free How it works
  • Responds using your scenario
  • Stores customer data
  • Transfers the context
ChatRex mascot
Help us choose a solution for the sales department
How many managers work with incoming requests?
Action in ChatGPT / OpenAIThe response is generated via the connected OpenAI API

How ChatRex works with your OpenAI account

ChatRexonline · bot response
Today
Help us choose a solution for the sales department10:24
How many managers work with incoming requests?10:24✓✓
Action completed in ChatGPT / OpenAIThe response is generated via the connected OpenAI API
Scenario 01

Processes messages through the connected API

ChatRex sends the model context within your OpenAI API project and returns the generated response to the client

Own API project

ChatRex uses your OpenAI project key to process messages

Checking the connection

After adding the key, a test dialog confirms the availability of the model and billing

Separate API billing

ChatGPT Subscription and OpenAI API Costs - Different Products and Accounts

Connecting OpenAI to ChatRex

What happens to each request, why it matters to the business, and where the team saves time

Own API project

ChatRex uses your OpenAI project key to process messages

Checking the connection

After adding the key, a test dialog confirms the availability of the model and billing

Separate API billing

ChatGPT Subscription and OpenAI API Costs - Different Products and Accounts

Selecting an Available Model

Operation depends on the models and rights available to the connected OpenAI project

The key does not open

The secret is not published on the site and is not added to prompts or the knowledge base

Diagnostics by response

If the bot does not respond, the project, billing, key and access to the model are checked

Real ChatRex case studies: how AI bots help businesses handle every enquiry
Explore real implementations in retail, healthcare, manufacturing, services, and recruitment — with customer goals, figures, and results
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Want the same for your business?
Automate customer consultations, respond faster, and reduce the support workload without compromising service quality. We’ll show how an AI bot can work in your business
Test it in the app

Launch the demo chat and see how the bot responds to your customers in real time
Sign up and answer 4 questions about your business

The AI assistant will create a ready-to-use chatbot with a greeting, FAQ, and objection handling
1
Launch your chatbot in 10 minutes with 3 simple steps
Connect your channels

Add WhatsApp, Telegram, your CRM, or website chat in a few clicks, and the bot will start working with your customers
3
2
AI implementation is easier than it seems

What makes ChatRex different from other solutions

ChatRex fits into existing processes and supports your team. Here’s what makes it different

A ready-to-use bot after 4 questions, not weeks of setup
The AI assistant builds a conversation flow for your business, giving you a working bot ready to connect
Message costs up to 4x less than alternatives
Transparent pricing with no hidden markups. You pay for messages, not for overhead
Product capabilities grow faster than the market
We continuously add new capabilities, so you get updates without custom development or migrations

Cost of use

$ USD
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One AI bot

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Integration with any system

AI workflow

ChatGPT for business through your OpenAI account

ChatGPT for business can power ChatRex responses through the company's own OpenAI API project, while the bot still follows its instruction, knowledge sources and handoff rules

The OpenAI chatbot integration lets a team connect OpenAI API access, choose an available AI model and keep OpenAI usage separate from ChatRex billing. The ChatGPT chatbot remains a managed business workflow, not a general assistant

In brief

Frequently asked questions about ChatGPT / OpenAI

How does ChatGPT for business work?

ChatGPT for business can power ChatRex responses through the company's own OpenAI API project, while the bot still follows its instruction, knowledge sources and handoff rules

What data does the ChatGPT / OpenAI integration use?

ChatRex sends the model context within your OpenAI API project and returns the generated response to the client. Result: The response is generated via the connected OpenAI API

When does a team member join the conversation?

If the bot does not respond, the project, billing, key and access to the model are checked