OpenAI has started rolling out a new memory synthesis system for ChatGPT, calling the upgrade Dreaming V3. The release, which began on Thursday for ChatGPT Plus and Pro subscribers in the United States, is intended to improve how the chatbot retains and uses user preferences and conversational context across sessions.
According to the company, Dreaming V3 works by automatically curating relevant details from prior chat history in the background. The design specifically targets problems the firm identified with previous memory capabilities - namely staleness and accuracy - by letting the system surface and use context without users having to explicitly save items.
Memory functionality for ChatGPT was first introduced in April 2024 as saved memories, a feature that required users to instruct the assistant to store certain details. In April 2025, OpenAI deployed the first generation of dreaming, which enabled the model to reference chat context beyond the saved memories list. The new Dreaming V3 is described as a markedly more capable and more compute-efficient architecture compared with earlier iterations.
OpenAI provided comparative performance figures for the upgraded system. Factual recall task success is reported to have improved to 82.8%, compared with 67.9% in 2025 and 41.5% in 2024. Preference adherence has risen to 71.3%, up from 55.3% in 2025 and 31.4% in 2024. The system's ability to remain current over time reached 75.1%, versus 52.2% in 2025 and 9.4% in 2024.
In addition to accuracy gains, the company says it cut the compute required to operate dreaming by about five times. That reduction is cited as a key factor in making the feature practical to offer to Free users as well as paid subscribers. OpenAI also noted that dreaming will serve as a shared memory foundation for all users and that it will continue to iterate on the capability.
The initial rollout is limited to Plus and Pro users in the United States, with an expansion to other countries and Free users planned over the coming weeks. The company framed the update as both a performance and an efficiency upgrade without providing additional technical details beyond the comparative metrics and the compute reduction estimate.
Deployment context
OpenAI is positioning Dreaming V3 as a background mechanism that curates chat history automatically rather than relying solely on explicit saved memories. The company reports measurable improvements in three core areas - factual recall, preference adherence and staying current - and a substantial reduction in compute cost to support broader availability.