It’s capable of carrying on conversations with human users and generating a wide range of text outputs including recipes, computer code, essays and personal letters. GPT-4o Mini, the fastest model, is optimized for everyday tasks and available to all users (free-tier users are automatically switched to it when hitting use limits on GPT-4o). GPT-4o’s image generator is now the default in ChatGPT for all users, offering you the ability to generate highly realistic images from simple text prompts. ChatGPT relies on large language models (LLMs), enabling it to understand your questions and provide human-like responses.
- Over many iterations of ChatGPT, plus users maintained more access to better models than the free tier provided, and access to additional features like voice mode.
- In December 2024, OpenAI launched a new feature allowing users to call ChatGPT with a telephone for up to 15 minutes per month for free.
- ChatGPT has never been publicly available in China because OpenAI prevented Chinese users from accessing their site.
- In the reinforcement learning stage, human trainers first ranked responses generated by the model in previous conversations.
- According to TechCrunch, it is a service based on o3 that combines advanced reasoning and web search capabilities to make comprehensive reports within 5 to 30 minutes.
How to Use ChatGPT on Mobile
Geoffrey Hinton, one of the “fathers of AI”, voiced concerns that future AI systems may surpass human intelligence. In October 2025, OpenAI banned accounts suspected to be linked to the Chinese government for violating the company’s national security policy. In late March 2023, the Italian data protection authority banned ChatGPT in Italy and opened an investigation. Stanford researchers reported that GPT-4 “passes a rigorous Turing test, diverging from average human behavior chiefly to be more cooperative.”
Paid tier
Furthermore, in response to competition from rivals like Chinese AI company DeepSeek R1, OpenAI rolled out trials for its newest lightweight model and deep research, accessible even to free-tier users (with limited access). Despite decades of using AI, Wall Street professionals report that consistently beating the market with AI, including recent large language models, is challenging due to limited and noisy financial data. The GPT Store allows users to share their customized GPT models with others.
About this app
A study presented example attacks on ChatGPT, including jailbreaks and reverse psychology. ChatGPT is programmed to reject prompts that may violate its content policy. It retains much of the information on the Web, in the same way, that a JPEG retains much of the information of a higher-resolution image, but, if you’re looking for an exact sequence of bits, you won’t find it; all you will ever get is an approximation.
GPT-4o
The user can interrupt tasks or provide additional instructions as needed. In July 2025, OpenAI released ChatGPT agent, an AI agent that can perform multi-step tasks. In 2025, OpenAI added several features to make ChatGPT more agentic (capable of autonomously performing longer tasks). At launch, OpenAI included more than 3 million GPTs created by GPT Builder users in the GPT Store. The integration used ChatGPT to write prompts for DALL-E guided by conversations with users. In October 2023, OpenAI’s image generation model DALL-E 3 was integrated into ChatGPT Plus and ChatGPT Enterprise.
As before, OpenAI has not disclosed technical details such as the exact number of parameters or the composition of its training dataset. According to OpenAI, it features reduced hallucinations and enhanced pattern recognition, creativity, and user interaction. Later reports showed the bug was much more severe than initially believed, with OpenAI reporting that it had leaked users’ “first and last name, email address, payment address, the last four digits (only) of a credit card number, and credit card expiration date”. Shortly after the bug was fixed, users could not see their conversation history. In March 2023, a bug allowed some users to see the titles of other users’ conversations. One such workaround, popularized on Reddit in early 2023, involved making ChatGPT assume the persona of “DAN” (an acronym for “Do Anything Now”), instructing the chatbot that DAN answers queries that would otherwise be rejected by the content policy.
- For example, ChatGPT Plus access is often free for students in the US and Canada during exam periods.
- According to OpenAI, it features reduced hallucinations and enhanced pattern recognition, creativity, and user interaction.
- “There are things that have existed in the past that these statistically oriented models will then pick up on, but we don’t want to project those associations into the future.
- In October 2025, OpenAI reported that approximately 0.15% of ChatGPT’s active users in a given week have conversations including explicit indicators of potential suicidal planning or intent, translating to more than a million people weekly.
- The GPT Store allows users to share their customized GPT models with others.
- This has led to concern over the rise of what has come to be called “synthetic media” and “AI slop” which are generated by AI and rapidly spread over social media and the internet.
Edit, Translate and Summarize Content
The new features also provide enhanced analytics referral links if they enable their robots.txt files to interact with OpenAI’s site crawler. For example, ChatGPT will offer hints, organize content into sections and create custom lessons and quizzes instead of providing a direct answer to students. OpenAI has faced quite a bit of criticism for how students can use ChatGPT to cheat on their homework or exams, and the company.introduced a study mode tool to directly address those concerns. Based on internal evaluations, GPT-5 outperforms its predecessors in multiple areas, including math, coding, visual perception and health knowledge. Following the addition of agentic e-commerce and easy checkout features, OpenAI partnered with Walmart, the country’s largest retailer to enhance digital shopping experiences. This feature keeps group chats separate from personal conversations within ChatGPT, where adding another user to an existing chat creates a copy of the original conversation.
How to use ChatGPT for work
ChatGPT’s reliance on data found online makes it vulnerable to false information, which in turn can impact the veracity of its statements. ChatGPT can also be accessed as a mobile app on iOS and Android devices. ChatGPT is one of many AI content generators tackling the art of the written word — whether that be a news article, press release, college essay or sales email. And it has affected how everyday people experience the internet in “profound ways,” according to Raghu Ravinutala, the co-founder and CEO of customer experience startup Yellow.ai. In order to sift through terabytes of internet data and transform that into a text response, ChatGPT uses a technique called transformer architecture (hence the “T” in its name).
Select a mode for your prompt
ChatGPT is built on a transformer architecture, specifically the GPT (generative pretrained transformer) family of models, ergo the name ChatGPT. ChatGPT became one of the fastest-growing apps in history, amassing hundreds of millions of users. Launched in November 2022 by OpenAI, the company co-founded by Sam Altman, ChatGPT quickly became the most popular AI application ever released, and the one everyone tried to emulate and one-up. It runs on the latest GPT-5 model, has app integrations, and can do web searches and deep research and even complete tasks autonomously for you, and more. Apart from models, there are modes and tools in ChatGPT that allow you to go beyond basic chatting. The sidebar has all your chats and settings, the chat window is where you type prompts, the model picker controls how fast it responds, and the tools menu lets you upload files or access other modes.
A 2023 study reported that GPT-4 obtained a better score than 99% of humans on the Torrance Tests of Creative Thinking. In The Atlantic magazine’s “Breakthroughs of the Year” for 2022, Derek Thompson included ChatGPT as part of “the generative-AI eruption” that “may change our mind about how we work, how we think, and what human creativity is”. GPT-5 was launched on August 7, 2025, and is publicly accessible through ChatGPT, Microsoft Copilot, and via OpenAI’s API. Released in February 2025, GPT-4.5 was described by Altman as a “giant, expensive model”. In September 2024, OpenAI introduced o1-preview and a faster, cheaper model named o1-mini. GPT-4o (“o” for “omni”) is a multilingual, multimodal generative pre-trained transformer developed by OpenAI and released in May 2024.
In my experience, the web version offers the fullest range of features available. There’s still a free version of ChatGPT, but the Plus and Pro plans can do faster responses and vegas casino download provide access to the latest tools. Thanks to all these capabilities, people use ChatGPT for just about everything now — writing, brainstorming, translating, coding, studying, web searching, and shopping. ChatGPT is not the same AI chatbot that first burst onto the scene in 2022. If you see inaccuracies in our content, please report the mistake via this form. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards.
For more common languages, AI translators like ChatGPT did better than Google Translate, while for “niche” languages (Amharic and Tagalog), Google Translate performed better. The languages tested were Polish, French, Korean, Spanish, Arabic, Tagalog, and Amharic. In December 2023, the Albanian government decided to use ChatGPT for the rapid translation of European Union documents and the analysis of required changes needed for Albania’s accession to the EU.
Experts and privacy advocates have raised ongoing questions about data protection, how personal information is stored and used, and what users should or shouldn’t share. Models o3 and o4-mini are reasoning models, where o3 is especially strong in coding, math and visual tasks, while o4-mini is a lighter and cost-efficient version. All ChatGPT users on the web and iOS/Android now have a Library where images are automatically saved, letting you revisit, reuse or edit them without digging through old chats. I’ve covered the models and modes above, but here’s a reminder of all the core features (as of October 2025).
It won’t appear in history, update its memory or be used to train models, although it may be kept for up to 30 days for safety. It also rolled GPT-4o back to its prior version after users on X complained that its “sycophantic” praise felt unsettling and distressing. “You can create systems that can fool people into thinking that this thing that you’re talking to is human,” Jaffri tells CNET. Like other AI chatbots, it uses deep learning algorithms to understand context and predicts the most likely next word in a sentence based on patterns it’s seen before.
It can also critique the user’s writing, summarize long documents and translate text from one language to another. Through its ChatGPT Search feature, it is competing more directly with Google search (even removing mandatory login requirements to make it that much easier for casual users). OpenAI expanded ChatGPT’s memory feature, allowing the chatbot to recall previous interactions (which you can manage or delete), creating a more personalized user experience.