# Hidden-state inversion on C4 (first 100 prompts)

Source: [Hidden-state inversion on C4 (first 100 prompts)](<https://www.sota2.com/research/sota/hidden-state-inversion-on-c4-first-100-prompts>)

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

Data updated: 2026-07-02T09:22:20.628Z

Evaluation of Hidden-state inversion performance on the first 100 prompts subset of the C4 dataset, measured by EM (%) and SMmean.

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 | Hidden-state inversion |
| Dataset (including any stated split) | C4 (first 100 prompts) |
| Metric | EM |
| Unit | PERCENT |
| Direction | Higher is better |
| Results loaded | 6 of 6 |
| 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

- [EM](<https://www.sota2.com/research/sota/hidden-state-inversion-on-c4-first-100-prompts.md?metric=EM>): Higher is better; unit: PERCENT.

- [SMmean](<https://www.sota2.com/research/sota/hidden-state-inversion-on-c4-first-100-prompts.md?metric=SMmean>): Higher is better; unit: PERCENT.

- [Token Time (s)](<https://www.sota2.com/research/sota/hidden-state-inversion-on-c4-first-100-prompts.md?metric=Token%20Time%20(s)>): Lower is better; unit: TIME.

## Recorded results

| Method | EM | Result date | Report paper |
| --- | --- | --- | --- |
| sipit\_ref | 100 | Not recorded | 6a45f092dc71372d7795a2de |
| Custom | 96 | Not recorded | 6a45f092dc71372d7795a2de |
| Custom | 73 | Not recorded | 6a45f092dc71372d7795a2de |

### sipit\_ref

EM: 100. Result ID: 6a462dc960b88bb33985f7e7.

[Reporting paper](<https://www.sota2.com/research/paper/6a45f092dc71372d7795a2de.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a45f092dc71372d7795a2de.md>)

Recorded evaluation configuration: {"Implementation":"reference"}. This record does not assert independent reproduction.

### Custom

EM: 96. Result ID: 6a462dc960b88bb33985f7e6.

[Reporting paper](<https://www.sota2.com/research/paper/6a45f092dc71372d7795a2de.md>)

Recorded evaluation configuration: {"Implementation":"High-acc"}. This record does not assert independent reproduction.

### Custom

EM: 73. Result ID: 6a462dc960b88bb33985f7e5.

[Reporting paper](<https://www.sota2.com/research/paper/6a45f092dc71372d7795a2de.md>)

Recorded evaluation configuration: {"Implementation":"Baseline"}. This record does not assert independent reproduction.

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