{"slug": "pm-bench-evaluating-prospective-memory-in-llm-agents", "title": "PM-Bench: Evaluating Prospective Memory in LLM Agents", "summary": "Researchers introduced PM-Bench, a text-based benchmark to evaluate prospective memory in LLM agents, inspired by cognitive science's Virtual Week paradigm. Testing eight state-of-the-art LLMs across eight configurations, the best-performing GPT-5.4 agent achieved only 65.1% F1 score, revealing significant challenges in maintaining and executing delayed intentions. The benchmark is released as a controlled testbed for developing interventions to improve reliable prospective behavior in AI agents.", "body_md": "arXiv:2607.12385v1 Announce Type: new\nAbstract: A significant challenge in agentic AI is prospective memory: the ability to execute an intention at a specific future cue or state while other activities are ongoing. We introduce PM-Bench, a text-based benchmark for measuring prospective memory capabilities in modern LLM agents. Inspired by the Virtual Week paradigm from cognitive science, PM-Bench evaluates how well LLM agents maintain user intentions, execute delayed intentions, and monitor latent environment changes. Over the course of a simulated seven-day week, agents must continue an ongoing activity while deciding whether any deferred task is due. We compare eight state-of-the-art LLMs on PM-Bench under eight different agent configurations. PM-Bench proves challenging across all settings: the best method, a GPT-5.4 agent, reaches only 65.1\\% F1 score under our evaluation. Furthermore, no single strategy for improving prospective memory dominates across models. We release PM-Bench as a controlled testbed for diagnosing these failures and developing training or inference-time interventions that support reliable prospective behavior.", "url": "https://wpnews.pro/news/pm-bench-evaluating-prospective-memory-in-llm-agents", "canonical_source": "https://arxiv.org/abs/2607.12385", "published_at": "2026-07-15 04:00:00+00:00", "updated_at": "2026-07-15 04:23:18.141967+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-agents", "ai-research", "ai-safety"], "entities": ["PM-Bench", "GPT-5.4", "Virtual Week"], "alternates": {"html": "https://wpnews.pro/news/pm-bench-evaluating-prospective-memory-in-llm-agents", "markdown": "https://wpnews.pro/news/pm-bench-evaluating-prospective-memory-in-llm-agents.md", "text": "https://wpnews.pro/news/pm-bench-evaluating-prospective-memory-in-llm-agents.txt", "jsonld": "https://wpnews.pro/news/pm-bench-evaluating-prospective-memory-in-llm-agents.jsonld"}}