# Perplexity introduces Brain memory system for Perplexity Computer

The system organizes user sessions, files, and sources into a structured knowledge wiki stored as linked Markdown files.

- Offline background agents, called Dream agents, continuously synthesize new information into memory updates within defined guardrails.
- Foreground agents query and explore the memory filesystem on demand without loading full history into every prompt.
- Evaluation benchmarks report gains of 9.3 points in correctness, 8.0 in currentness, and 8.9 in recall while using 15% fewer tokens.

## Why it matters

Perplexity Computer users gain persistent context across sessions and files without running into prompt context limits.

## Sources

- [Perplexity: Perplexity introduces Brain memory system for Perplexity Computer](https://x.com/perplexity_ai/status/2092634609079218374)

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Summarized by dstilled on 2026-08-26. https://dstilled.ai/story/28a3db6a-6bcb-4622-aeff-b78e41b5265e