OpenAI unveiled GPT-5, the latest iteration of its landmark language model series, introducing capabilities the company says represent "a qualitative leap" beyond current AI systems — including real-time chain-of-thought reasoning, native multimodal understanding of text, images, audio and video, and a one-million-token context window.

Real-Time Reasoning

The model narrates its step-by-step thinking process in real time, allowing users to follow, correct and intervene in its logic chain. In benchmarks, this approach reduced hallucination rates by 67%.

Pricing and Access

GPT-5 is available to ChatGPT Plus subscribers immediately and via the API at $0.015 per 1,000 input tokens — roughly twice the cost of GPT-4o but with significantly higher performance on complex tasks.