Step1X-Edit
StepFunOpenApache 2.0
Step1X-Edit is an AI image model from StepFun. It is not on LMArena’s Text-to-image leaderboard yet. On LMArena’s Image editing leaderboard it ranks 60 of 60 with 996±5 from 155,416 votes. License: Apache 2.0.
Key figures
- Developer
- StepFun
- License
- Apache 2.0
- Released (per AA)
- Apr 2025
Not yet available: LMArena · Text-to-image
Who it is for (from the data)
- When quality is not the top priority: #60 of 60 on Image editing, in the bottom half; if quality matters most, check higher-ranked models first.
- Mainly image editing: no text-to-image results yet.
- Self-hosting or on-premise use: LMArena lists its license as Apache 2.0.
Neighbours on Image editing
| # | Model | Score | Votes | AA Elo | License | Δ |
|---|---|---|---|---|---|---|
| 54 |  FLUX.1 Kontext [dev] Black Forest Labs | 1151 | 3,639,665 | – | flux-1-dev-non-commercial-license | +155 |
| 55 |  SeedEdit 3.0 ByteDance | 1139 | 4,918,211 | 901 | Proprietary | +143 |
| 56 |  GPT-Image-1 OpenAI | 1139 | 2,869,690 | 995 | Proprietary | +143 |
| 57 | GPT-Image-1 mini OpenAI | 1124 | 682,782 | 934 | Proprietary | +128 |
| 58 |  Gemini 2.0 Flash Preview Image Generation Google | 1082 | 4,942,749 | – | Proprietary | +86 |
| 59 | BAGEL ByteDance | 1027 | 13,488 | 792 | Apache 2.0 | +31 |
| 60 | Step1X-Edit StepFun | 996 | 155,416 | 601 | Apache 2.0 |
Alternatives · Top open-weight models
| # | Model | Score | Votes | AA Elo | License |
|---|---|---|---|---|---|
| 19 |  Qwen-Image-2.1 Alibaba | 1362 | 36,713 | 1081 | qwen-research |
| 29 |  HunyuanImage 3.0 Instruct Tencent | 1302 | 331,438 | 1063 | tencent-hunyuan-community |
| 38 | Qwen-Image-Edit Alibaba | 1241 | 2,021,780 | – | Apache 2.0 |
| 40 | Qwen-Image-Edit (2511) Alibaba | 1233 | 485,092 | – | Apache 2.0 |
| 43 | FLUX.2 [klein] 9B Black Forest Labs | 1224 | 540,679 | 1015 | flux-non-commercial-license |
How to read the scores
- LMArena score: people blind-pick the better of two anonymous images for the same prompt, and the votes are fitted into an Elo-style rating; "±" is the 95% confidence interval.
- Text-to-image and image edit are separate boards, so scores are not comparable across them; AA Elo comes from Artificial Analysis on a different scale.
- If the gap between two models is smaller than their combined intervals, the order is not statistically reliable; treat them as the same tier. More votes mean narrower intervals.
FAQ
Where does Step1X-Edit rank among AI image models?
Image editing rank 60 (996) (LMArena, data as of Oct 26, 2026).
Is Step1X-Edit open-weight?
LMArena lists its license as Apache 2.0 (not proprietary); check the license text for commercial-use terms.
Who makes Step1X-Edit?
According to LMArena, Step1X-Edit is made by StepFun.
How reliable is Step1X-Edit's score?
The scores are based on 155,416 votes on Image editing (95% CI ±5). More votes and narrower intervals mean a more stable rank.
How far is Step1X-Edit from #1 on Image editing?
#1 on Image editing is GPT-Image-2.5 Sunburst (1514); Step1X-Edit scores 996, 518 points behind.
Sources
LMArena Text-to-image data published on Oct 7, 2026.
LMArena Image editing data published on Oct 20, 2026.
17NAS syncs the upstream leaderboards daily; this page's data was synced on Oct 26, 2026.
Price, resolution and speed have no reliable public data yet and are omitted; all values come from the snapshot, blanks show –.