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 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. Here’s how it works, its use cases, how to access it, its limitations, notable updates and future outlook. In March 2023, a bug allowed some users to see the titles of other users’ conversations.

  • As of 2023, there were several pending U.S. lawsuits challenging the use of copyrighted data to train AI models, with defendants arguing that this falls under fair use.

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  • The fine-tuning process involved supervised learning and reinforcement learning from human feedback (RLHF).

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  • The company announced a slew of generative AI-powered features to counter OpenAI and Microsoft.

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  • This includes text-to-image models such as Stable Diffusion and large language models such as ChatGPT.

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  • It is now available to both paying and non-paying ChatGPT users, with usage limitations of course.
  • In March 2023, a bug allowed some users to see the titles of other users’ conversations.

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  • Premium users were originally limited in the number of messages they could send to the new model, but OpenAI increased and eventually removed these limits.

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  • Despite this, users may «jailbreak» ChatGPT with prompt engineering techniques to bypass these restrictions.

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  • Many individuals use ChatGPT and comparable large language models (LLM) for mental health and emotional support.

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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.

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  • These limitations may be revealed when ChatGPT responds to prompts including descriptors of people.
  • According to an OpenAI blog post, ChatGPT will build memories on its own over time, though users can also prompt the bot to remember specific details — or forget them.

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The Pro launch coincided with the release of the o1 model, providing unlimited access to o1 and advanced voice mode. In March 2025, OpenAI updated ChatGPT to generate images using GPT-4o instead of DALL-E. Users interact with ChatGPT through conversations which consist of text, audio, and image inputs and outputs.

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  • In January 2023, the International Conference on Machine Learning banned any undocumented use of ChatGPT or other large language models to generate any text in submitted papers.

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  • ChatGPT is due for more upgrades in the near future, with the advanced voice mode potentially receiving a live camera feature to create even more seamless interactions.

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  • It can also critique the user’s writing, summarize long documents and translate text from one language to another.

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  • Teachers are concerned that students will use it to cheat, prompting some schools to completely block access to it.

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  • In August 2025, OpenAI released GPT-5, its fastest and smartest model to date, and the current language model for ChatGPT.
  • The chatbot can facilitate academic dishonesty, generate misinformation, and create malicious code.

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Stanford researchers reported that GPT-4 «passes a rigorous Turing test, diverging from average human behavior chiefly to be more cooperative.» The company announced a slew of generative AI-powered features to counter OpenAI and Microsoft. 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». The languages tested were Polish, French, Korean, Spanish, Arabic, Tagalog, and Amharic. For more common languages, AI translators like ChatGPT did better than Google Translate, while for «niche» languages (Amharic and Tagalog), Google Translate performed better.

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GPT-4, which was released on March 14, 2023, was made available via API and for premium ChatGPT users. Premium users were originally limited in the number of messages they could send to the new model, but OpenAI increased and eventually removed these limits. The laborers were exposed to toxic and traumatic content; one worker described the assignment as «torture». OpenAI’s Crowngreen casino outsourcing partner was Sama, a training-data company based in San Francisco, California.

Regional responses

Despite its acclaim, the chatbot has been criticized for its limitations and potential for unethical use. It can generate plausible-sounding but incorrect or nonsensical answers known as hallucinations. The chatbot can facilitate academic dishonesty, generate misinformation, and create malicious code. The ethics of its development, particularly the use of copyrighted content as training data, have also drawn controversy. In late March 2023, the Italian data protection authority banned ChatGPT in Italy and opened an investigation.

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This could enable ChatGPT to keep track of larger documents and conversations, and to handle more complex projects. 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. In June 2023, hundreds of people attended a «ChatGPT-powered church service» at St. Paul’s Church in Fürth, Germany. Geoffrey Hinton, one of the «fathers of AI», voiced concerns that future AI systems may surpass human intelligence. ChatGPT also provided an outline of how human reviewers are trained to reduce inappropriate content and to attempt to provide political information without affiliating with any political position. ChatGPT’s training data only covers a period up to the cut-off date, so it lacks knowledge of recent events.
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ChatGPT is due for more upgrades in the near future, with the advanced voice mode potentially receiving a live camera feature to create even more seamless interactions. AI agents represent stage three of AGI, enhancing ChatGPT’s reasoning abilities and enabling it to complete a broader range of tasks without human assistance. The feature is also still exclusive to ChatGPT users who have a Plus, Team, Enterprise or Education plan. OpenAI announces the ChatGPT Pro plan, a new premium plan for ChatGPT users to access even more features. For example, ChatGPT will offer hints, organize content into sections and create custom lessons and quizzes instead of providing a direct answer to students. For example, the new model doubles its context window from 128,000 tokens in GPT-4o to 256,000 tokens in GPT-5.