Perplexity Brain: Self-Improving Memory Across Sessions, Website Publishing, Microsoft 365 Integration

What's new

• Brain (self-improving memory): Computer builds a private context graph across sessions, connectors, and files; refreshes nightly — boosted answer accuracy by 25% and recall by 16%
• Opus 4.8 Fast Mode: for complex tasks without quality loss
• Claude Fable 5 orchestrator: routes subtasks to appropriate tools and models for research synthesis
• Mid-task model switching: change orchestrator between follow-ups without restarting the conversation
• Website publishing: publish to pplx.app or custom domain with granular access controls
• Microsoft 365 integration: Computer works directly in Word, Excel, PowerPoint, Outlook, and Teams
• Per-model usage analytics: admins see consumption by model

Why it matters

Brain is a leap from static AI assistance to an agent with growing context — a direct rival to Mem.ai and Notion AI Memory. Microsoft 365 integration makes Perplexity a direct competitor to Copilot for Microsoft 365.

How to try it

Available for Perplexity Pro subscribers. Brain activates automatically after first use of Computer.