# Long Multi-session Question Answering on LongMemEval 1.0 (test) Source: [Long Multi-session Question Answering on LongMemEval 1.0 (test)]() Collection index: [llms.txt]() Data updated: 2026-06-11T10:26:30.425Z Evaluation of Long Multi-session Question Answering performance on the test split of LongMemEval version 1.0, using F1-based metrics including KU F1, SS-assist F1, and Overall F1. A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. | Scope | Recorded value | | --- | --- | | Task | Long Multi-session Question Answering | | Dataset (including any stated split) | LongMemEval 1.0 (test) | | Metric | KU F1 | | Unit | PERCENT | | Direction | Higher is better | | Results loaded | 10 of 10 | | Coverage | All results currently returned for this benchmark | Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol. ## Metrics - [KU F1](): Higher is better; unit: PERCENT. - [SS-assist F1](): Higher is better; unit: PERCENT. - [SS-prefer F1](): Higher is better; unit: PERCENT. - [SS-user F1](): Higher is better; unit: PERCENT. - [Temporal F1](): Higher is better; unit: PERCENT. - [Overall F1](): Higher is better; unit: PERCENT. ## Recorded results | Method | KU F1 | Result date | Report paper | | --- | --- | --- | --- | | HORMA | 34.6 | Not recorded | 6a2a4136d33dfb23e783943b | | Acon | 24.5 | Not recorded | 6a2a4136d33dfb23e783943b | | ReSum | 23.2 | Not recorded | 6a2a4136d33dfb23e783943b | | A-MEM | 21.7 | Not recorded | 6a2a4136d33dfb23e783943b | | Truncation | 21.4 | Not recorded | 6a2a4136d33dfb23e783943b | | Mem0 | 16.3 | Not recorded | 6a2a4136d33dfb23e783943b | | Embedding Retrieval | 13.7 | Not recorded | 6a2a4136d33dfb23e783943b | | No limit | 9.2 | Not recorded | 6a2a4136d33dfb23e783943b | | Embedding | 8.8 | Not recorded | 6a2a4136d33dfb23e783943b | | Slide Window | 7.1 | Not recorded | 6a2a4136d33dfb23e783943b | ### HORMA KU F1: 34.6. Result ID: 6a2a8bedfbc373592c285770. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"External Dynamic Memory"}. This record does not assert independent reproduction. ### Acon KU F1: 24.5. Result ID: 6a2a8bedfbc373592c28576c. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"Internal Dynamic Memory"}. This record does not assert independent reproduction. ### ReSum KU F1: 23.2. Result ID: 6a2a8bedfbc373592c28576b. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"Internal Dynamic Memory"}. This record does not assert independent reproduction. ### A-MEM KU F1: 21.7. Result ID: 6a2a8bedfbc373592c28576d. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"External Dynamic Memory"}. This record does not assert independent reproduction. ### Truncation KU F1: 21.4. Result ID: 6a2a8bedfbc373592c285768. [Reporting paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"Internal Static Memory"}. This record does not assert independent reproduction. ### Mem0 KU F1: 16.3. Result ID: 6a2a8bedfbc373592c28576e. [Reporting paper]() [Method origin paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"External Dynamic Memory"}. This record does not assert independent reproduction. ### Embedding Retrieval KU F1: 13.7. Result ID: 6a2a8bedfbc373592c28576f. [Reporting paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"External Dynamic Memory"}. This record does not assert independent reproduction. ### No limit KU F1: 9.2. Result ID: 6a2a8bedfbc373592c285767. [Reporting paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"Unconstrained"}. This record does not assert independent reproduction. ### Embedding KU F1: 8.8. Result ID: 6a2a8bedfbc373592c28576a. [Reporting paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"Internal Static Memory"}. This record does not assert independent reproduction. ### Slide Window KU F1: 7.1. Result ID: 6a2a8bedfbc373592c285769. [Reporting paper]() Recorded evaluation configuration: {"Backbone":"Claude Sonnet 4.5","Context Limit":"50K tokens","Memory Architecture":"Internal Static Memory"}. This record does not assert independent reproduction. Page 1 of 1. This is an index page, not the full collection.