Perplexity Unveils Brain, a Self-Improving Memory System for AI Agents

Perplexity Gives Its Agent a Memory

Perplexity AI has begun rolling out Brain, a continuously learning memory system designed to make its Computer agent platform smarter over time. CEO Aravind Srinivas announced the feature on LinkedIn, calling it "a self-improving context-graph of all your sessions, connectors, and files" that "updates itself overnight with fresh context proactively."

How Brain Works

Unlike traditional AI memory, which mostly stores user preferences and working style, Brain is built to remember what the Computer agent actually did, including what worked, what failed, and what corrections were made along the way. Every task performed on Computer feeds into a context graph that Brain builds and maintains. The system then reviews that graph at set intervals, such as overnight, to improve the agent's performance on future tasks.

According to Perplexity, Brain lets Computer start each new task with full context of a user's past projects, decisions, and sources, rather than beginning from scratch every time. On tasks that require historical context, the company says Brain improves answer correctness by 25%, increases recall by 16%, and reduces cost per task by 13%.

From Stateless to Stateful

The feature is an evolution of Perplexity Computer, the multi-model AI agent system the company launched in February 2026. Computer orchestrates 19 AI models to autonomously handle research, coding, design, and project management workflows from a single prompt. Until now, though, Computer lacked a structured way to learn across sessions, effectively forgetting everything between tasks.

Brain is currently available as a research preview for Perplexity Max and Enterprise Max subscribers, accessible under "Customize" in the sidebar. The Max tier costs $200 per month.

A Crowded Agent Landscape

The launch comes as Perplexity keeps building out its Computer ecosystem. In early June, the company released Personal Computer for Mac, bringing the same multi-model orchestration to a user's local machine and files, and it has integrated Computer into Slack for team workflows. With Brain, Perplexity is betting that persistent, self-improving memory will set its agent apart from rivals that reset context between sessions, a problem the entire industry is now racing to solve.