On June 4, 2026, OpenAI announced an upgrade to ChatGPT's memory function. The new system, based on the Dreaming V3 mechanism, primarily improves memory obsolescence, accuracy, and large-scale service capabilities. ChatGPT's memory function was initially launched in April 2024, relying on explicit user prompts to save memories. In April 2025, OpenAI introduced Dreaming as a supplement, automatically filtering and organizing relevant content from chat history. This upgrade elevates Dreaming to a mature underlying architecture, setting memory standards to continue useful context, adhere to user preference restrictions, and automatically update over time. Comparisons show that the new system offers stronger performance while saving computational resources. The new system automatically integrates important details to generate summaries, displayed on the memory summary page. Users can view, supplement, and modify their profiles, inform the model of scenarios where topics are raised, and inquire further about memory details. Plus and Pro users in the U.S. can experience this from today, with memory capacity doubled. OpenAI stated that recent improvements have reduced the computational power required for Dreaming to serve Free users to one-fifth, paving the way for future expansion to free users.