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description: "In a groundbreaking performance result, MemMachine reaches new heights on the challenging LoCoMo benchmark, setting a new standard for long-term conversational memory in AI agents. Discover how our multi-layered memory system is revolutionizing the field."
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- /blog/2025/09/locomo-results/
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In their paper, "[Evaluating Very Long-Term Conversational Memory of LLM Agents](https://arxiv.org/abs/2402.17753)", Snap researchers introduced the open-source [LoCoMo benchmark](https://github.com/snap-research/LoCoMo). LoCoMo provides a new standard for evaluating the true long-term conversational memory of AI agents.
Meet MemMachine, an open-source memory layer for advanced AI agents. It enables AI-powered applications to learn, store, and recall data and preferences from past sessions to enrich future interactions. MemMachine's memory layer persists across multiple sessions, agents, and large language models, building a sophisticated, evolving user profile. It transforms AI chatbots into personalized, context-aware AI assistants designed to understand and respond with better precision and depth.
<ahref="https://playground.memmachine.ai/" class="btn btn-primary mx-2" style="background-color: #5d5dd4;" target="_blank">Go to Playground</a>
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<p>On the login page, click "Continue with Google" to create a secure account and log in. The email and password feature is not enabled.</p>
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<imgsrc="/img/playground_signin_with_OAuth.png" alt="Continue with Google button" style="width: 100%; max-width: 400px; margin-top: 10px; border-radius: 8px;">
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<p>In the model selection dropdown at the top of the page, click the '+' to add both of these models to create a side-by-side comparison:</p>
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<ulclass="list-disc ml-6 mt-2">
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<li><spanclass="highlight-text-gradient">gpt-4.1-mini:</span> This model has no memory and will not remember information in a new chat session.</li>
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<li><spanclass="highlight-text-gradient">gpt-4.1-mini-memory:</span> This model uses the power of MemMachine to remember facts and information within and across chat sessions.</li>
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</ul>
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<imgsrc="/img/playground_select_models.png" alt="Model selection dropdown with two models" style="width: 100%; max-width: 500px; margin-top: 10px; border-radius: 8px;">
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<p>Once both models are added, you can start chatting. You can compare the response from both models simultaneously.</p>
<p>Start a new chat session by clicking the "New Chat" button on the left sidebar. Continue chatting. You will notice the <spanclass="highlight-text-gradient">gpt-4.1-mini</span> forgets everything from the previous session(s), whereas the <spanclass="highlight-text-gradient">gpt-4.1-mini-memory</span> retains context and information from all prior sessions.</p>
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