# Unconditional Image Synthesis on FFHQ 50k synthetic evaluation 256x256 (train test)

Source: [Unconditional Image Synthesis on FFHQ 50k synthetic evaluation 256x256 (train test)](<https://www.sota2.com/research/sota/unconditional-image-synthesis-on-ffhq-50k-synthetic-evaluation-256x256-train-test>)

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

Data updated: 2026-02-26T05:37:44.961Z

Evaluation of unconditional image synthesis models on the 50k synthetic evaluation set of FFHQ at 256x256 resolution, measured using FID and IS metrics.

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 | Unconditional image synthesis |
| Dataset (including any stated split) | FFHQ 50k synthetic evaluation 256x256 (train test) |
| Metric | Best FID |
| Unit | SCALAR |
| Direction | Lower is better |
| Results loaded | 2 of 2 |
| 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

- [Best FID](<https://www.sota2.com/research/sota/unconditional-image-synthesis-on-ffhq-50k-synthetic-evaluation-256x256-train-test.md?metric=Best%20FID>): Lower is better; unit: SCALAR.

- [Best IS](<https://www.sota2.com/research/sota/unconditional-image-synthesis-on-ffhq-50k-synthetic-evaluation-256x256-train-test.md?metric=Best%20IS>): Higher is better; unit: SCALAR.

- [Median FID](<https://www.sota2.com/research/sota/unconditional-image-synthesis-on-ffhq-50k-synthetic-evaluation-256x256-train-test.md?metric=Median%20FID>): Lower is better; unit: SCALAR.

- [Median IS](<https://www.sota2.com/research/sota/unconditional-image-synthesis-on-ffhq-50k-synthetic-evaluation-256x256-train-test.md?metric=Median%20IS>): Higher is better; unit: SCALAR.

## Recorded results

| Method | Best FID | Result date | Report paper |
| --- | --- | --- | --- |
| U-Net GAN | 7.48 | Not recorded | 68fa69971e209131cea22eac |
| BigGAN | 11.48 | Not recorded | 68fa69971e209131cea22eac |

### U-Net GAN

Best FID: 7.48. Result ID: 698dbd8f8b517eb433237154.

[Reporting paper](<https://www.sota2.com/research/paper/68fa69971e209131cea22eac.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa69971e209131cea22eac.md>)

[Implementation](<https://github.com/boschresearch/unetgan>)

Recorded evaluation configuration: {"runs":"Best/Median of 5 runs","training\_iterations":"400k"}. This record does not assert independent reproduction.

### BigGAN

Best FID: 11.48. Result ID: 698dbd8f8b517eb433237153.

[Reporting paper](<https://www.sota2.com/research/paper/68fa69971e209131cea22eac.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa65661e209131cea0a090.md>)

[Implementation](<https://tfhub.dev/s?q=biggan>)

Recorded evaluation configuration: {"runs":"Best/Median of 5 runs","training\_iterations":"400k"}. This record does not assert independent reproduction.

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