Perplexity's AI Agent Now Has a Brain That Learns From Its Own Mistakes

In brief

• Perplexity launched Brain, a memory system for Computer that builds a context graph of past sessions, sources, and corrections—then synthesizes it overnight into a personal LLM wiki loaded before each new task.
• Perplexity's own early metrics show Brain boosts answer correctness by 25% on repeated tasks, recall by 16%, and cuts the cost of context-heavy tasks by 13%.
• Brain is rolling out…