Black Forest Labs · Image model
FLUX.2 Klein 4B.
FLUX.2 [klein] 4B is the fastest and most cost-effective model in the FLUX.2 family, optimized for high-throughput use cases while maintaining excellent image quality. Pricing is based on the output...
Arena quality
—
No comparable result
Preference samples
—
Not evaluated
Price
—
Per 1,000 images at the evaluated setting
Reference images
4
Images accepted as visual guidance
What this means.
This model is available through OpenRouter, but it does not yet have an exact comparable Text-to-Image Arena result. We do not estimate a quality score.
Practical specifications.
- Resolutions
- —
- Aspect ratios
- 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9, auto
- Quality settings
- —
- Seed control
- Yes
- Transparent/background control
- No
See where FLUX.2 Klein 4B stands.
| Model | Company | Quality | Evidence |
|---|---|---|---|
| GPT Image 2 | OpenAI | 100 | Both workflows / exact match |
| MAI-Image-2.5 | Microsoft | 99 | Both workflows / exact match |
| Nano Banana 2 (Gemini 3.1 Flash Image Preview) | 98 | Both workflows / exact match | |
| Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) | 97 | Both workflows / exact match | |
| Nano Banana Pro (Gemini 3 Pro Image) | 94 | Both workflows / exact match | |
| Recraft V4.1 Utility | Recraft | 92 | Both workflows / exact match |
| Grok Imagine Image Quality | xAI | 92 | Both workflows / exact match |
| FLUX.2 Max | Black Forest Labs | 90 | Both workflows / exact match |
| Recraft V4.1 Utility Pro | Recraft | 91 | Both workflows / exact match |
| Krea 2 Medium | Krea | 88 | Both workflows / exact match |
| Krea 2 Large | Krea | 89 | Both workflows / exact match |
| Krea 2 Medium Turbo | Krea | 86 | Both workflows / exact match |