By January 2023, ChatGPT had become the fastest-growing consumer software application in history, gaining over 100 million users in two months. As Romibet of 2025, ChatGPT's website is among the 5 most-visited websites globally, and has over 800 million active weekly users.

• This tool allows a user to customize ChatGPT's behavior for a specific use case.
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• OpenAI has already gotten a glimpse of this future through its o1 model, and the results have been mixed.
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• OpenAI announced that it is letting users buy goods directly in ChatGPT through a feature called Instant Checkout.
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• In one instance, ChatGPT generated a rap in which women and scientists of color were asserted to be inferior to white male scientists.
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• The language models used in ChatGPT are specifically optimized for dialogue and were trained using reinforcement learning from human feedback (RLHF).
• Your prompts (on Free, Plus and Pro plans) may be used to train the model unless you opt out in settings.

GPT-5 vs. GPT 4o

ChatGPT is an artificial intelligence chatbot capable of having conversations with people and generating unique, human-like text responses. Many individuals use ChatGPT and comparable large language models (LLM) for mental health and emotional support. OpenAI acknowledged that there have been "instances where our 4o model fell short in recognizing signs of delusion or emotional dependency", and reported that it is working to improve safety. ChatGPT is a chatbot and AI assistant built on large language model technology. It is designed to generate human-like text and can carry out a wide variety of tasks. It can also be fine-tuned for specific use cases such as legal documents or medical records, where the model is trained on domain-specific data.

Expansion of Advanced Voice Mode to Browsers (November

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• OpenAI announced the addition of product recommendations on ChatGPT when users implied shopping intent in their queries.
• The paid version of ChatGPT also offers features like image and voice inputs and integrations with other OpenAI services like the image generator DALL-E.
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• OpenAI's outsourcing partner was Sama, a training-data company based in San Francisco, California.
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• It was trained on massive amounts of data from books and the internet -- websites, Wikipedia, Reddit threads, news sites and much, much more.
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• Geoffrey Hinton, one of the "fathers of AI", voiced concerns that future AI systems may surpass human intelligence.
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• Not only can ChatGPT generate working computer code of its own (in many different languages), but it can also translate code from one language to another, and debug existing code.
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|} Similar to a phone’s auto-complete feature, ChatGPT uses a prediction model to guess the most likely next word based on the context it has been provided. ChatGPT Team lets companies create shared workspaces with settings that apply to all users, as well as the ability to share proprietary data sets. OpenAI announces the ChatGPT Pro plan, a new premium plan for ChatGPT users to access even more features.

Want to learn more about ChatGPT?

Despite this, users may "jailbreak" ChatGPT with prompt engineering techniques to bypass these restrictions. [...] It's also a way to understand the "hallucinations", or nonsensical answers to factual questions, to which large language models such as ChatGPT are all too prone. These limitations may be revealed when ChatGPT responds to prompts including descriptors of people. In one instance, ChatGPT generated a rap in which women and scientists of color were asserted to be inferior to white male scientists. GPT-4, which was released on March 14, 2023, was made available via API and for premium ChatGPT users.

What can you do with ChatGPT?

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• The languages tested were Polish, French, Korean, Spanish, Arabic, Tagalog, and Amharic.
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• OpenAI supports limited, no-login access in many regions, so you can try ChatGPT instantly.
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• A 2023 study reported that GPT-4 obtained a better score than 99% of humans on the Torrance Tests of Creative Thinking.
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• ChatGPT is powered by a large language model made up of neural networks trained on a massive amount of information from the internet, including Wikipedia articles and research papers.
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• It currently uses GPT-5, a generative pre-trained transformer (GPT), to generate text, speech, and images in response to user prompts.
• In my experience, the web version offers the fullest range of features available.

OpenAI's outsourcing partner was Sama, a training-data company based in San Francisco, California. ZDNET's recommendations are based on many hours of testing, research, and comparison shopping. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing.

GPT-4.5

The language models used in ChatGPT are specifically optimized for dialogue and were trained using reinforcement learning from human feedback (RLHF). GPT-4o is the most advanced version accessible to everyone, handling text, images and audio as input and output. ChatGPT relies on large language models (LLMs), enabling it to understand your questions and provide human-like responses. In late March 2023, the Italian data protection authority banned ChatGPT in Italy and opened an investigation. OpenAI said it has taken steps to effectively clarify and address the issues raised; an age verification tool was implemented to ensure users are at least 13 years old. {

Answer Questions

|} So far, users can make single-item purchases from domestic sellers on online marketplace Etsy, as well as some merchants on Shopify’s e-commerce platform. In August 2025, OpenAI released GPT-5, its fastest and smartest model to date, and the current language model for ChatGPT. OpenAI claims that GPT-5 outperforms past models in math, real-world coding, multimodal understanding and health knowledge, and is also less likely to hallucinate or make false claims. Teachers are concerned that students will use it to cheat, prompting some schools to completely block access to it. Not only can ChatGPT generate working computer code of its own (in many different languages), but it can also translate code from one language to another, and debug existing code. {

Release of Instant Checkout Feature (September

|} I've covered the models and modes above, but here's a reminder of all the core features (as of October 2025). This is used to not only help the model determine the best output, but it also helps improve the training process, enabling it to answer questions more effectively. Here’s how it works, its use cases, how to access it, its limitations, notable updates and future outlook. Recently, OpenAI made ChatGPT's image generation capabilities free for all users, albeit with a limited number of monthly uses. Beyond text, ChatGPT can generate original images and videos through its integrated tools. If you prefer to keep using Dall-E 3 (its first image generator), you can still access it through the Dall-E GPT.