AI may be getting smarter, but most systems forget as quickly as they process. EverMind, an AI infrastructure company, is tackling this challenge head-on with EverMemOS, its newly released long-term memory system. Achieving 92.3% on LoCoMo and 82% on LongMemEval-S, EverMemOS sets new state-of-the-art benchmarks, significantly surpassing prior methods for durable, coherent machine memory.
The goal? Equip AI agents with persistent “souls”—stable identities that grow and adapt over time. EverMemOS already powers EverMind’s Tanka, a next-generation AI agent, and is designed to support a wide range of AI applications requiring continuity, reasoning, and context retention.
Inspired by Human Temporal Memory
EverMemOS’s design philosophy draws from human cognition. At the AIAS 2025 Symposium in San Francisco, entrepreneur Chen Tianqiao highlighted the difference between current AI’s “spatial structure” paradigm—static and instantaneous—and the human brain’s “temporal structure” paradigm, which continuously integrates time-based information. EverMemOS implements this temporal structure, enabling AI to retain, adapt, and grow knowledge across interactions.
Three Innovations Transform AI Memory
1. Active, Applied Memory: Unlike conventional memory systems that merely store and retrieve information, EverMemOS continuously integrates memories into reasoning. Each interaction leverages historical context to generate consistent, personalized outputs.
2. Hierarchical Memory Extraction: Memories are converted into semantic MemCells and organized within evolving memory graphs. This structured approach links related ideas, surpassing similarity-based retrieval and supporting complex applications like reasoning-driven agents, professional assistants, and emotionally aware companions.
3. Extensible Modular Framework: EverMemOS adapts to diverse needs. Professional workflows demand precise structured memory, companion models require emotional context, and agentic tasks need continuity. Its modular architecture selects the optimal memory strategy for each scenario, solving the limitations of rigid single-form memory systems.
Flexible Access for Developers and Enterprises
EverMind is offering EverMemOS in multiple formats:
- Open-source version for hands-on developers
- Cloud service with trials and subscriptions later this year
- Custom deployment for strategic partners
- Personalized hardware-integrated version for MCP-enabled AI use cases
By addressing one of AI’s most persistent limitations—short-term memory—EverMemOS provides a scalable, customizable architecture for AI agents to maintain behavioral consistency, learn continuously, and operate with extended context.
As AI moves toward persistent, adaptive, and identity-aware systems, EverMemOS lays the groundwork for a new class of intelligent agents, giving them memory, continuity, and personality-like persistence.
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