04-x

04-x is a private chat platform designed for working with modern large language models. Simply put, it is a single window where you can chat with chatbots from OpenAI and Anthropic, as well as generate images. The key feature of the service is its approach to privacy. Unlike many similar aggregators, it uses end-to-end encryption, which means that even the platform owners do not have access to the contents of your conversations. The system allows you to switch between different models, compare their responses, and use image generation without leaving the chat interface.

04-x Characteristics

Characteristic	Value
Type	Chat platform for working with LLM models
Categories	Conversations, AI browsers
Supported models	OpenAI (GPT-4, GPT-4o mini, GPT-3.5, DALL·E 3) and Anthropic (Claude 3.5 Sonnet, Claude 3 Opus, Claude 3 Haiku, etc.)
Privacy	End-to-end encryption of data (API keys, prompts, responses) using the user's password. The platform has no access to session contents and does not use them for training
Sign-in methods	Google or email
Website	04-x.com
Publication date	December 30, 2025

Who is 04-x suitable for?

Developers and technical specialists

The tool will be useful for developers who regularly work with APIs of different models. Instead of opening multiple tabs with different interfaces, you can connect to the platform and send requests to GPT-4 and Claude in a single window, comparing results to find the optimal solution for code or architecture.

Privacy-conscious users

This is the core audience segment. Those who work with sensitive data, trade secrets, or simply do not want their requests used for model training will find a solution here. End-to-end encryption guarantees that conversations remain private.

AI enthusiasts and researchers

For those who want to stay up to date with the capabilities of different neural networks, the platform provides a simple way to test them. You can quickly switch between models within a single conversation, evaluating response style, depth of analysis, and speed.

How to use 04-x?

Step 1: Registration and sign-in

Getting started requires no complex setup. Simply go to 04-x.com and sign in using a Google account or email address. This is a standard procedure that does not take much time.

Step 2: Choosing a model and starting a conversation

After signing in, the interface offers a model selection. You can start with GPT-4 for complex analytical tasks or Claude 3.5 Sonnet for working with large volumes of text. The platform also offers demo chats and example conversations to help you get familiar with the interface and understand how it works.

Step 3: Working with images

The DALL·E 3 model is used for image generation. Simply switch to the appropriate mode and describe in text what you want to create. The result appears right in the chat window, which is convenient for quick iterations and edits.

Key features of 04-x

Private chat interface

The platform provides a secure space for communicating with LLMs. All API keys, prompts, and responses are encrypted. The user's password is used for decryption, and the service does not store data in plain text.

Multi-model support

04-x combines models from two leading labs: OpenAI (including GPT-4, GPT-4o mini, and GPT-3.5) and Anthropic (Claude 3.5 Sonnet, Claude 3 Opus, Claude 3 Haiku). This provides flexibility in choosing the right tool for a specific task.

A single window for text and images

The ability to generate not only text but also images via DALL·E 3 in the same interface where the chat takes place. This simplifies content creation when you need to combine a text description with a visualization.

Learning materials

The platform offers demo chats and example conversations. They help new users quickly understand the service's capabilities and serve as a starting point for experiments.

Advantages of 04-x

Focus on privacy

The main selling point is end-to-end encryption. Users can be confident that their sessions are inaccessible to the platform administration and are not used for training neural networks. This sets the service apart from many other aggregators.

Wide selection of models

The ability to use both the latest GPT versions and the full Claude lineup. This allows you to solve tasks of any complexity, from generating simple texts to complex data analysis, without needing to register on multiple websites.

Convenient comparison

An interface that lets you test different models in a single window saves time. There is no need to copy prompts between services — all responses come into a single conversation feed.

Disadvantages of 04-x

Based on the provided data, no obvious functional shortcomings of the platform can be identified. There is no information about possible request limits, message length restrictions, or the presence of ads. Pricing and available plans are also not specified. It can be assumed that for some users, the barrier to entry will be the need to trust a third-party service with their passwords; however, the technical details of the encryption implementation are not disclosed in the source data.

What tasks does 04-x solve?

Secure communication with LLMs

The platform solves the main problem of using cloud-based neural networks — the issue of privacy. It allows you to work with sensitive information without fear of leaks.

Testing and comparing models

Users can simultaneously evaluate the response quality of GPT-4 and Claude 3.5 Sonnet on identical requests. This helps choose the optimal model for specific business tasks or everyday use.

Content generation

The tool covers the needs for creating text materials, writing software code, and generating images. It is a versatile workspace for content creators and programmers.

04-x Pricing

The available source data does not include information about the cost of the service. The mentioned distribution model is also not defined. Thus, it is unknown whether the platform is fully free, operates on a subscription basis, or uses a pay-per-token model. For up-to-date pricing information, it is recommended to visit the official website 04-x.com.

04-x Terms of Use

The terms of service are not described in detail in the provided sources. It is only known that Google accounts or email are used for sign-in. A key condition is the use of the user's password for data encryption, which places responsibility on the account owner for safeguarding that password. Losing the password may make it impossible to access previously created encrypted sessions. Other terms of the user agreement are not published.

04-x Availability

The service is available via a web browser at 04-x.com. All you need is a device with internet access. The lack of a need to install additional software makes the platform cross-platform: it will work equally well on Windows, macOS, Linux, as well as on tablets and smartphones. The project's publication date is listed as December 30, 2025, indicating that it is a relatively new service on the market.

How 04-x differs from alternatives

The main difference between 04-x and classic chatbots (e.g., ChatGPT or Claude.ai) is that it is an aggregator. Instead of being tied to a single model, it provides access to several at once. This eliminates the need to switch between tabs to compare results.

When compared to similar aggregators, the key difference is the security architecture. End-to-end encryption, where even the service owner cannot see the contents of conversations, is rare. Most platforms store message history on their servers for improvement or moderation purposes. In 04-x, according to the description, this risk is eliminated: data is encrypted on the user's side and decrypted only locally.

An additional difference is the integration of DALL·E 3 image generation into the same interface where text conversations with LLMs take place. Not all multi-model platforms offer this capability in a single window.

Conclusion

04-x is a private chat platform that focuses on data privacy and versatility. It brings together the powerful language models of OpenAI and Anthropic in a single interface, allowing users to chat, write code, generate images, and compare the results of different neural networks. End-to-end encryption sets the service apart from many competitors, ensuring that personal data and requests remain inaccessible to third parties, including the platform administration. It is a reliable choice for developers and anyone who values privacy when working with artificial intelligence.