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What is GPT-5.4?
GPT-5.4 is the best OpenAI model. GPT models are among the most widely used AI models in the world, powering ChatGPT, the most used AI chatbot platform. Overchat AI is also making this powerful capability accessible to everyone through our all-in-one AI platform.
OpenAI, the company behind GPT-5.4, was founded in 2015 by Sam Altman, Elon Musk, and others, and it's famous as the creator of ChatGPT — the most popular AI application in the world.
GPT-5.4 is one of the best AI models OpenAI has ever released — it excells at coding, creative writing, math, and it's one of the best AI models for research. Its competitors include the upcoming DeepSeek V4 and Claude Opus 4.6.
GPT-5.4 Features
2 million token context window. This is double the context window of GPT-5.3-Codex, giving GPT-5.4 the ability to process massive documents without losing important details or context.
Compared to its predecessor GPT-5.2, the new version shows stronger reasoning, better factual accuracy, and noticeably improved writing quality.
GPT-5.4 is a proprietary model that was released and distributed by OpenAI through its own channels. Unlike DeepSeek models, GPT offerings aren't open source, meaning you can't install or run them locally or on Hugging Face. One of the best ways to access GPT-5.4 is through Overchat AI, since you don't need a separate OpenAI account, ChatGPT subscription, or API key.
One thing that sets this new model apart from past releases is its focus on transparency. GPT-5.4 is 33% less likely to make false claims and 18% less likely to produce errors in responses, compared to GPT-5.2. This makes GPT-5.4 perfect for critical tasks when you absolutely need to ensure the model hasn't made up an answer and that you can trust it. Use GPT-5.4 for work, homework, or professional inquiries.
