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LAXMAYDAY/
Qwen_image_edit_2511_int4

Name: Qwen_image_edit_2511_int4
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Qwen-Image-Edit-2511 Int4 Checkpoints

Overview

This repository provides Nunchaku int4 safetensors checkpoint files for Qwen-Image-Edit-2511. It packages multiple quantized variants in one place so you can choose between footprint and quality tradeoffs without pulling local-only reports or build metadata into the public release.

The repo now includes both standard 50-step checkpoints and selected 4-step / 8-step lightning checkpoints. This README is the current published index of files in the repo, including some newer lightning benchmark results that have not yet been folded back into the consolidated JSON reports.

Recommended Starting Points

quality-r64: default quality-focused starting point for the standard 50-step family
fast-r128: best FID among the consolidated 50-step variants
mid-r128-lightning8steps: strongest currently benchmarked 8-step lightning balance
quality-r128-b15-lightning8steps: best currently benchmarked 8-step lightning FID
balanced-r32-lightning8steps: smaller-footprint 8-step lightning option
Performance evaluations are not conducted separately for Lightning Variants, as their degradation is generally considered negligible and can be ignored

Standard 50-Step Variants

Variant	File	Size (GiB)	PSNR	SSIM	LPIPS	FID	Notes
balanced-r32	`nunchaku_qwen_image_edit_2511_balanced_r32_int4.safetensors`	10.73	19.1581	0.8058	0.2019	77.3707	smaller footprint
balanced-r32-i64	`nunchaku_qwen_image_edit_2511_balanced_r32_i64_int4.safetensors`	10.73	19.2460	0.8134	0.2059	76.1155	-
balanced-r32-b125	`nunchaku_qwen_image_edit_2511_balanced_r32_b125_int4.safetensors`	10.73	19.2856	0.8103	0.2005	78.7961	-
fast-r32	`nunchaku_qwen_image_edit_2511_fast_r32_int4.safetensors`	10.73	19.1576	0.8110	0.2058	77.9059	-
fast-r64	`nunchaku_qwen_image_edit_2511_fast_r64_int4.safetensors`	11.08	19.4508	0.8130	0.2024	71.5310	-
fast-r128	`nunchaku_qwen_image_edit_2511_fast_r128_int4.safetensors`	11.79	19.5990	0.8153	0.1897	70.1136	best FID
mid-r32	`nunchaku_qwen_image_edit_2511_mid_r32_int4.safetensors`	10.73	19.4421	0.8075	0.2006	82.5143	-
mid-r128	`nunchaku_qwen_image_edit_2511_mid_r128_int4.safetensors`	11.79	19.6128	0.8259	0.1828	76.2305	-
quality-r32	`nunchaku_qwen_image_edit_2511_quality_r32_int4.safetensors`	10.73	19.4316	0.8136	0.1954	82.3566	-
quality-r64	`nunchaku_qwen_image_edit_2511_quality_r64_int4.safetensors`	11.08	19.6273	0.8158	0.1856	73.9762	default quality
quality-r96	`nunchaku_qwen_image_edit_2511_quality_r96_int4.safetensors`	11.43	19.5872	0.8158	0.1935	74.5920	-
quality-r96-b175	`nunchaku_qwen_image_edit_2511_quality_r96_b175_int4.safetensors`	11.43	19.3046	0.8167	0.1939	78.3015	-
quality-r96-i128	`nunchaku_qwen_image_edit_2511_quality_r96_i128_int4.safetensors`	11.43	19.6934	0.8189	0.1915	74.2818	-
quality-r128-b15	`nunchaku_qwen_image_edit_2511_quality_r128_b15_int4.safetensors`	11.79	19.7177	0.8202	0.1857	80.3767	-

Lightning Variants

Variant	File	Size (GiB)	PSNR	SSIM	LPIPS	FID	Notes
balanced-r32-lightning4steps	`nunchaku_qwen_image_edit_2511_balanced_r32_lightning4steps_q128o64m64_int4.safetensors`	11.26	-	-	-	-	4-step lightning, metrics pending
balanced-r32-lightning8steps	`nunchaku_qwen_image_edit_2511_balanced_r32_lightning8steps_q128o96m96_int4.safetensors`	11.52	20.3516	0.8262	0.1955	70.8734	8-step lightning, smaller footprint
mid-r128-lightning4steps	`nunchaku_qwen_image_edit_2511_mid_r128_lightning4steps_q128o128m128_int4.safetensors`	11.79	-	-	-	-	4-step lightning, metrics pending
mid-r128-lightning8steps	`nunchaku_qwen_image_edit_2511_mid_r128_lightning8steps_q128o128m128_int4.safetensors`	11.79	21.1254	0.8349	0.1668	69.9338	8-step lightning, best PSNR / SSIM / LPIPS among benchmarked lightning rows
quality-r64-lightning4steps	`nunchaku_qwen_image_edit_2511_quality_r64_lightning4steps_q128o64m64_int4.safetensors`	11.26	-	-	-	-	4-step lightning, metrics pending
quality-r64-lightning8steps	`nunchaku_qwen_image_edit_2511_quality_r64_lightning8steps_q128o64m64_int4.safetensors`	11.26	-	-	-	-	8-step lightning, metrics pending
quality-r96-lightning4steps	`nunchaku_qwen_image_edit_2511_quality_r96_lightning4steps_q128o96m112_int4.safetensors`	11.63	-	-	-	-	4-step lightning, metrics pending
quality-r96-b175-lightning4steps	`nunchaku_qwen_image_edit_2511_quality_r96_b175_lightning4steps_q128o96m112_int4.safetensors`	11.63	-	-	-	-	4-step lightning, metrics pending
quality-r96-b175-lightning8steps	`nunchaku_qwen_image_edit_2511_quality_r96_b175_lightning8steps_q160o128m128_int4.safetensors`	11.87	-	-	-	-	8-step lightning q160, metrics pending
quality-r128-b15-lightning4steps	`nunchaku_qwen_image_edit_2511_quality_r128_b15_lightning4steps_q128o128m128_int4.safetensors`	11.79	-	-	-	-	4-step lightning, metrics pending
quality-r128-b15-lightning8steps	`nunchaku_qwen_image_edit_2511_quality_r128_b15_lightning8steps_q128o128m128_int4.safetensors`	11.79	20.6295	0.8311	0.1745	69.5480	8-step lightning, best FID among benchmarked lightning rows

Metrics

Higher is better for PSNR and SSIM.
Lower is better for LPIPS and FID.
The standard 50-step rows above come from the consolidated local metrics report.
The three benchmarked 8-step lightning rows above come from the same 24-prompt holdout setup against the same BF16 50-step reference set, but they have not yet been folded into the consolidated JSON report in this repo.
Rows marked metrics pending are published checkpoints without a consolidated quality report in the repo yet.

Limitations

Quantized checkpoints can shift quality, latency, and memory behavior depending on runtime, hardware, scheduler, LoRA choice, and inference settings.
Lightning checkpoints operate in a different step regime than the standard 50-step variants, so treat the table as practical guidance rather than a single global leaderboard.

LAXMAYDAY/Qwen_image_edit_2511_int4