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Zero-Mem: Zero-Token Memory Operations for LLM Agents

arxiv.org

August 5, 2026

2 min read

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Summary

Zero-Mem introduces zero-token memory operations for large language model (LLM) agents, allowing them to maintain consistency in long interactions without incurring additional token and time costs from multiple LLM calls. This method aims to improve memory management by reducing the complexity and potential loss of detail in memory retrieval processes.

Key Takeaways

Zero-Mem introduces zero-token memory operations for LLM agents, eliminating the need for additional LLM calls during memory operations.
The system organizes interaction traces using an entity-context graph and a temporal hierarchy to enhance memory retrieval.
Zero-Mem reduces memory-operation time costs by 57.6% compared to the fastest baseline while maintaining competitive performance on long-memory and long-context question-answering benchmarks.
Only the final question-answering step invokes an LLM, preserving original interaction traces without generating intermediate representations.

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