想测AI的记忆系统到底靠不靠谱？这个新基准MemOps把记忆拆成6种操作来测，比只看最终答案准多了，搞记忆研究的必读。
MemOps基准将对话记忆重新定义为生命周期操作序列,包括记住、遗忘、更新、反思及其组合。它通过可控生成流水线在长任务对话中嵌入操作,产生六类操作级探针,并在相邻证据与长上下文两种设置下评估。实验对比了长上下文、检索、参数化和托管记忆系统,发现会话级检索优于回合级检索,而长上下文模型在重构有序记忆状态轨迹上表现明显较弱。该基准揭示出仅靠最终答案准确度无法暴露的多种失败模式,推动记忆评估向可解释的操作级诊断转变。
MemOps: Benchmarking Lifecycle Memory Operations in Long-Horizon Conversations
Long-term memory has become a foundational capability for LLM-based agents that accompany users across extended, multi-session interactions. Existing benchmarks, however, evaluate such memory almost exclusively through downstream question answering, scoring only the correctness of a final answer. This black-box formulation conflates the heterogeneous causes of memory failure, such as missing the introduction of a relevant fact, binding an operation to the wrong target, or relying on stale values after a correction. As a result, it can credit correct answers despite their reliance on inconsistent or unsafe memory states. In this paper, we argue that, in dynamic long-horizon interactions, memory is not a static collection of facts but a lifecycle of explicit operations, including remembering, forgetting, updating, reflecting, and their compositions. We introduce MemOps, a benchmark that reformulates conversational memory as a sequence of lifecycle operations and represents each memory event with a structured trace specifying its trigger, target, scope, state transition, and supporting evidence. A controllable generation pipeline embeds these operations into long, task-oriented conversations and produces gold operation traces together with six categories of operation-level probes, evaluated under both adjacent-evidence and long-context settings. Across long-context, retrieval-based, parametric and managed-memory systems, MemOps disentangles failure modes that final-answer accuracy alone conceals, revealing that current systems remain far from uniformly reliable. For instance, session-level retrieval outperforms turn-level retrieval, and long-context models remain notably weak at reconstructing ordered memory-state trajectories. These results move long-term memory evaluation from final-answer scoring toward interpretable, operation-level diagnosis.