# Knowledge Update on LongMemEval-M

Source: [Knowledge Update on LongMemEval-M](<https://www.sota2.com/research/sota/knowledge-update-on-longmemeval-m>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-02-27T13:55:51.031Z

Evaluation of model performance on the Knowledge Update task using the LongMemEval-M dataset, reporting F1, Accuracy, and LLM-as-a-Judge scores.

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 | Knowledge-update |
| Dataset (including any stated split) | LongMemEval-M |
| Metric | F1 Score |
| Unit | PERCENT |
| Direction | Higher is better |
| Results loaded | 7 of 7 |
| 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

- [F1 Score](<https://www.sota2.com/research/sota/knowledge-update-on-longmemeval-m.md?metric=F1%20Score>): Higher is better; unit: PERCENT.

- [Accuracy](<https://www.sota2.com/research/sota/knowledge-update-on-longmemeval-m.md?metric=Accuracy>): Higher is better; unit: PERCENT.

- [LLM-as-a-Judge Score](<https://www.sota2.com/research/sota/knowledge-update-on-longmemeval-m.md?metric=LLM-as-a-Judge%20Score>): Higher is better; unit: SCALAR.

## Recorded results

| Method | F1 Score | Result date | Report paper |
| --- | --- | --- | --- |
| HIPPOCAMPUS | 6.23 | Not recorded | 6993f5e69ebc499c974098eb |
| MemOS | 4.77 | Not recorded | 6993f5e69ebc499c974098eb |
| MemoryOS | 4.12 | Not recorded | 6993f5e69ebc499c974098eb |
| A-mem | 3.46 | Not recorded | 6993f5e69ebc499c974098eb |
| MemGPT | 2.19 | Not recorded | 6993f5e69ebc499c974098eb |
| MemoryBank | 1.88 | Not recorded | 6993f5e69ebc499c974098eb |
| ReadAgent | 1.56 | Not recorded | 6993f5e69ebc499c974098eb |

### HIPPOCAMPUS

F1 Score: 6.23. Result ID: 69a1a24c35dfcabb00e7ea03.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

### MemOS

F1 Score: 4.77. Result ID: 69a1a24c35dfcabb00e7ea02.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7a611e209131cea82bda.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

### MemoryOS

F1 Score: 4.12. Result ID: 69a1a24c35dfcabb00e7ea01.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa793f1e209131cea7cdc0.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

### A-mem

F1 Score: 3.46. Result ID: 69a1a24c35dfcabb00e7ea00.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7bf31e209131cea8b869.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

### MemGPT

F1 Score: 2.19. Result ID: 69a1a24c35dfcabb00e7e9ff.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa722a1e209131cea54e5c.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

### MemoryBank

F1 Score: 1.88. Result ID: 69a1a24c35dfcabb00e7e9fe.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6f731e209131cea45ab8.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

### ReadAgent

F1 Score: 1.56. Result ID: 69a1a24c35dfcabb00e7e9fd.

[Reporting paper](<https://www.sota2.com/research/paper/6993f5e69ebc499c974098eb.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa74351e209131cea6074c.md>)

Recorded evaluation configuration: Not recorded. This record does not assert independent reproduction.

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