The official app by OpenAIIntroducing ChatGPT for Android: OpenAI’s latest advancements at your fingertips. This official app is free, syncs your history across devices, and brings you the latest from OpenAI, including the new image generator. With ChatGPT in your pocket, you’ll find: · Image generation–Generate original images from a description, or transform existing ones with a few , ChatGPT is based on GPT foundation models that were fine-tuned for conversational assistance, including GPT-4o, GPT-4.5, o3, and o4-mini. [18] The fine-tuning process leveraged supervised learning and reinforcement learning from human feedback (RLHF). [19][20] Both approaches employed human trainers to improve model performance. In the case of supervised learning, the trainers played both , As the AI chatbot's advanced conversational capabilities continue to generate buzz, here are detailed answers to your most-asked questions., It's core to our mission to make tools like ChatGPT broadly available so that people can experience the benefits of AI. More than 100 million people across 185 countries use ChatGPT weekly to learn something new, find creative inspiration, and get answers to their questions. Starting today, you can use ChatGPT instantly, without needing to sign-up. We're rolling this out gradually, with the , ChatGBT, an advanced AI language model developed by OpenAI, has revolutionized the way we interact with technology. Launched in 2020, it has rapidly evolved from a basic conversational tool to a sophisticated system capable of understanding and generating human-like text with remarkable accuracy., Commonly asked questions about ChatGPTChatGPT is free to use, though we do have subscription plans available, available on our pricing page. How does ChatGPT work? ChatGPT is fine-tuned from GPT-3.5, a language model trained to produce text. ChatGPT was optimized for dialogue by using Reinforcement Learning with Human Feedback (RLHF) – a method that uses human demonstrations and preference .