# Attention Head Health Analysis on BLOOM-1b7

Source: [Attention Head Health Analysis on BLOOM-1b7](<https://www.sota2.com/research/sota/attention-head-health-analysis-on-bloom-1b7>)

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

Data updated: 2026-03-11T09:08:03.711Z

Evaluation of the health and functionality of internal attention heads within the BLOOM-1b7 model, categorized by metrics such as Healthy, BOS-sink, DEAD, and Low-entropy heads.

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 | Attention Head Health Analysis |
| Dataset (including any stated split) | BLOOM-1b7 internal attention heads |
| Metric | Healthy Heads Count |
| Unit | SCALAR |
| Direction | Higher is better |
| Results loaded | 3 of 3 |
| 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

- [Healthy Heads Count](<https://www.sota2.com/research/sota/attention-head-health-analysis-on-bloom-1b7.md?metric=Healthy%20Heads%20Count>): Higher is better; unit: SCALAR.

- [BOS-sink Head Count](<https://www.sota2.com/research/sota/attention-head-health-analysis-on-bloom-1b7.md?metric=BOS-sink%20Head%20Count>): Lower is better; unit: SCALAR.

- [Dead Head Count](<https://www.sota2.com/research/sota/attention-head-health-analysis-on-bloom-1b7.md?metric=Dead%20Head%20Count>): Lower is better; unit: SCALAR.

- [Low-entropy Head Count](<https://www.sota2.com/research/sota/attention-head-health-analysis-on-bloom-1b7.md?metric=Low-entropy%20Head%20Count>): Lower is better; unit: SCALAR.

## Recorded results

| Method | Healthy Heads Count | Result date | Report paper |
| --- | --- | --- | --- |
| Surgical Reinitialization (Pass 2) | 379 | Not recorded | 69b0f7312d603e6de3e45ff5 |
| Surgical Reinitialization (Pass 1) | 341 | Not recorded | 69b0f7312d603e6de3e45ff5 |
| BLOOM-1b7 (Stock) | 242 | Not recorded | 69b0f7312d603e6de3e45ff5 |

### Surgical Reinitialization (Pass 2)

Healthy Heads Count: 379. Result ID: 69b130ec6dbb7075b95bccc7.

[Reporting paper](<https://www.sota2.com/research/paper/69b0f7312d603e6de3e45ff5.md>)

[Method origin paper](<https://www.sota2.com/research/paper/69b0f7312d603e6de3e45ff5.md>)

Recorded evaluation configuration: {"Surgical Stage":"Pass 2","Epochs":"E1","Params trained":"40M (2.3%)"}. This record does not assert independent reproduction.

### Surgical Reinitialization (Pass 1)

Healthy Heads Count: 341. Result ID: 69b130ec6dbb7075b95bccc6.

[Reporting paper](<https://www.sota2.com/research/paper/69b0f7312d603e6de3e45ff5.md>)

[Method origin paper](<https://www.sota2.com/research/paper/69b0f7312d603e6de3e45ff5.md>)

Recorded evaluation configuration: {"Surgical Stage":"Pass 1","Epochs":"E3","Params trained":"302M (17.5%)"}. This record does not assert independent reproduction.

### BLOOM-1b7 (Stock)

Healthy Heads Count: 242. Result ID: 69b130ec6dbb7075b95bccc5.

[Reporting paper](<https://www.sota2.com/research/paper/69b0f7312d603e6de3e45ff5.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6fdd1e209131cea47c06.md>)

Recorded evaluation configuration: {"Surgical Stage":"Stock","Params trained":"—"}. This record does not assert independent reproduction.

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