OpenAI Launches Dreaming V3: Background Memory Synthesis for ChatGPT with 5x Compute Reduction

OpenAI began rolling out Dreaming V3 on June 4-5, 2026 — a background process that automatically synthesizes ChatGPT memory from many conversations simultaneously, replacing the manual saved-memories list as ChatGPT's memory foundation. The system prioritizes freshness (auto-updating stale memories), continuity (linking sessions over days or weeks), and relevance filtering. Internal factual-recall evals improved from 41.5% (2024) to 82.8% (2026). A roughly 5x compute reduction makes free-tier rollout viable; Plus and Pro users in the US receive it first.