6arXiv cs.CL (Computation and Language)·
MemCon: Learned adaptive memory management for LLM agents via MDP-based policy
Researchers introduce Memory as a Controlled Process (MemCon), a framework that models LLM agent memory operations as a Markov Decision Process and learns an online policy for adaptive retrieval, plan injection, and memory consolidation. The system is backend-agnostic, wraps existing memory implementations, and uses a lightweight tabular contextual bandit with UCB exploration requiring no pretraining and no additional LLM calls. Evaluated across 6 benchmarks, 3 agent frameworks, and 3 LLM backbones, MemCon outperforms static memory baselines by up to 15.2 points in task success while reducing token consumption by 5–20%.
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AutoMem: Automated framework trains LLMs to manage memory as a learnable cognitive skill
AutoMem is a new framework that treats memory management in LLMs as a trainable skill, using two optimization loops: one that iteratively revises memory structure via trajectory review by a strong LLM, and one that distills good memory decisions into direct training signal for the agent model. Evaluated on three long-horizon procedurally generated games (Crafter, MiniHack, NetHack), optimizing memory alone yielded 2x-4x performance improvements, bringing a 32B open-weight model competitive with frontier systems like Claude Opus 4.5 and Gemini 3.1 Pro Thinking. The work draws on cognitive science concepts of metamemory and demonstrates that memory management is an independently learnable, high-leverage capability for long-horizon agentic tasks.
Mem-π: Adaptive Memory for LLM Agents via On-Demand Generation and Decoupled RL
Mem-π introduces a framework where a dedicated language or vision-language model generates context-specific guidance for LLM agents on demand, rather than retrieving static entries from episodic memory banks. The system is trained with a decision-content decoupled reinforcement learning objective that jointly learns when to generate guidance and what to generate, enabling abstention when generation would not help. Evaluated across web navigation, terminal-based tool use, and text-based embodied interaction benchmarks, Mem-π achieves over 30% relative improvement on web navigation tasks compared to retrieval-based and prior RL-optimized memory baselines.
MemOS: Self-Evolving Memory OS for LLM Agents with Hybrid Retrieval and Token Savings
MemOS is an open-source TypeScript project providing a memory operating system layer for LLM and AI agents, featuring ultra-persistent memory, hybrid retrieval, and cross-task skill reuse. The project claims 35.24% token savings through its memory management approach. It has accumulated 9,329 GitHub stars with moderate daily momentum (+67). The system targets agent memory persistence and efficiency as a foundational infrastructure component.
MEMPROBE: Benchmark for auditing long-term agent memory via hidden user-state recovery
MEMPROBE is a new benchmark that evaluates long-term memory in LLM agents by treating memory as an auditable artifact rather than measuring it only through downstream task performance. After a memory-equipped agent assists simulated users across a trajectory of tasks, the benchmark attempts to reconstruct a hidden, taxonomy-anchored user-state bank from the agent's memory store. Testing across 5 memory systems and 50 simulated users with 31 hidden dimensions each, the authors find that task completion and memory recovery are largely independent capabilities — task success nearly saturates even for memoryless baselines, while structured user-state recovery remains moderate (~0.6) and degrades under top-k retrieval constraints.
MemOps: Benchmark for lifecycle memory operations in long-horizon LLM conversations
MemOps is a new benchmark that reframes conversational memory evaluation as a sequence of explicit lifecycle operations—remembering, forgetting, updating, reflecting—rather than downstream question-answering accuracy alone. Each memory event is represented with a structured trace specifying trigger, target, scope, state transition, and evidence, embedded into long task-oriented conversations via a controllable generation pipeline. Evaluation across long-context, retrieval-based, parametric, and managed-memory systems reveals that current systems fail in distinct, previously conflated ways: session-level retrieval outperforms turn-level retrieval, and long-context models are notably weak at reconstructing ordered memory-state trajectories. The work shifts long-term memory evaluation from black-box final-answer scoring toward interpretable, operation-level diagnosis.
FluxMem: Connectivity-Evolving Memory Framework for LLM Agents
FluxMem proposes a heterogeneous graph-based memory framework for LLM agents that continuously evolves its topology through three stages: initial connection formation, feedback-driven refinement, and long-term consolidation. Unlike static memory repositories, FluxMem repairs missing links, prunes interference, aligns abstraction granularity, and distills successful trajectories into reusable procedural circuits. The system is guided by a single metric for memory generalizability and evolutionary maturity, achieving state-of-the-art results on LoCoMo, Mind2Web, and GAIA benchmarks.
LongMINT: Benchmark for Evaluating Memory Under Multi-Target Interference in Long-Horizon Agent Systems
LongMINT is a new benchmark designed to evaluate memory-augmented agents in realistic long-horizon settings where information is repeatedly updated and interferes across memories. It contains 15.6k QA pairs over contexts averaging 138.8k tokens (up to 1.8M tokens), spanning domains including state tracking, multi-turn dialogue, Wikipedia revisions, and GitHub commits. Evaluation of 7 representative systems—including vanilla long-context LLMs, RAG, and memory-augmented agent frameworks—reveals consistently low average accuracy of 27.9%, with performance particularly degraded on multi-target aggregation tasks and when earlier facts are revised by subsequent context. The analysis identifies retrieval and memory construction as the primary bottlenecks.
Infini Memory: Topic-structured persistent memory architecture for long-term LLM agents
Researchers propose Infini Memory, a persistent memory architecture for LLM agents that organizes memory as topic-structured documents rather than isolated records or summaries. New observations are staged in a buffer and periodically consolidated, while retrieval uses iterative agentic tool calls instead of a single lookup step. The system achieves 64.7% on MemoryAgentBench, with ablations showing complementary gains from topic-structured maintenance and iterative evidence inspection.