Users can interact with ChatGPT through text, audio, and image prompts. The language models used in ChatGPT are specifically optimized for dialogue and were trained using reinforcement learning from human feedback (RLHF). This approach incorporates human feedback into the training process so it can better align its outputs with user intent (and carry on with more natural-sounding dialogue). ChatGPT currently provides access to GPT-3.5 and superbet casino online limited access to the GPT-4o language model.

According to OpenAI, study mode is powered by custom system instructions written in collaboration with teachers, scientists and educational experts. 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. There’s also ChatGPT’s Advanced Voice Mode, powered by GPT-4o, which also makes conversations feel more natural, and it works in real time. You can interrupt, adjust the flow, and even have the model respond to emotions in your voice.

We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. 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. In September 2023, OpenAI announced a new update that allows ChatGPT to speak and recognize images.

The new mode offers more natural conversations allowing users to interrupt and ask additional questions. The update lets ChatGPT sense and respond to the user’s emotions with response. The voice is more natural-sounding but is limited to four preset options. But, because the approximation is presented in the form of grammatical text, which ChatGPT excels at creating, it’s usually acceptable. … 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.

While both the site and app allow you to access custom GPTs, some features, like the Sora video generator, are currently exclusive to the web browser. At the same time, its release prompted extensive media coverage and public debate about the nature of creativity and the future of knowledge work. In December 2024, OpenAI launched an experimental way to converse with ChatGPT by calling ChatGPT or messaging ChatGPT through WhatsApp. This allows more people to experiment with ChatGPT because no account is needed. WhatsApp only supports text so users cannot use images in conversations. ChatGPT automatically searches the internet based on the user’s prompt.

Because the platform is self-hosted, the agencies manage their security and privacy with their strict cybersecurity frameworks. The voice update will be available on apps for both iOS and Android. Images will be available on all platforms — including apps and ChatGPT’s website.

GPT-5 also added enhanced multimodal capabilities with improvements to email, calendar and code environment integrations. 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. ChatGPT is a chatbot created by OpenAI that can process text, image, audio and video data to answer questions, solve problems and more. Here’s how it works, its use cases, how to access it, its limitations, notable updates and future outlook.

And, because the model is able to produce incorrect information in such an eloquent way, the fallacies are hard to spot and control. ChatGPT’s reliance on data found online makes it vulnerable to false information, which in turn can impact the veracity of its statements. This often leads to what experts call “hallucinations,” where the output generated is stylistically correct, but factually wrong. ChatGPT can also be accessed as a mobile app on iOS and Android devices.

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. The process happens iteratively, building from words to sentences, to paragraphs, to pages of text. ChatGPT’s advanced Voice Mode is now available to small groups of paid ChatGPT Plus users.

ChatGPT originally used the GPT-3 large language model, a neural network machine learning model and the third generation of Generative Pre-trained Transformer. The transformer pulls from a significant amount of data to formulate a response. 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. The model has been trained through a combination of automated learning and human feedback to generate text that closely matches what you’d expect to see in text written by a human. Advanced voice mode enables ChatGPT users to have more natural-sounding conversations when interacting with the chatbot. OpenAI initially releases this feature to users who pay for the Plus, Team or Enterprise plan.