---
title: "flux-2-klein-4b — image generation score and price · Undominated.ai"
canonical: https://undominated.ai/images/bfl__flux-2-klein-4b/
description: "flux-2-klein-4b by Black Forest Labs: Text to image 1030.0 ±3.3; $0.014 per 1024×1024 image at Black Forest Labs; 2 sellers; as of 2026-09-19. Every figure traces to its source."
---

# flux-2-klein-4b — image generation score and price · Undominated.ai

> flux-2-klein-4b by Black Forest Labs: Text to image 1030.0 ±3.3; $0.014 per 1024×1024 image at Black Forest Labs; 2 sellers; as of 2026-09-19. Every figure traces to its source.

[Image generation](/images/)

# flux-2-klein-4b

Black Forest Labs · open weights

$0.014 per 1024×1024 image, cheapest of 2 sellers (Black Forest Labs)

Dominated: [flux-2-dev](/images/bfl__flux-2-dev/) scores higher and costs less. As of 2026-09-19 .

## What was measured

| Board | Elo | Rank (UB) | Votes | Published |
| --- | --- | --- | --- | --- |
| Text to image | 1030.0 ±3.3 | 64 | 144,483 | 2026-09-08 |
| Image edit | 1187.8 ±3.0 | 45 | 507,119 | 2026-09-08 |

## What sellers charge

Spread across 2 distinct sellers: **1×** between cheapest and dearest at the reference unit.

| Seller | As the seller states it | Conditions | Normalised per 1024×1024 image | Source |
| --- | --- | --- | --- | --- |
| Black Forest Labs | 0.014 per_megapixel | megapixelIsUnit | $0.014 per megapixel, seller counts 1024x1024 as one | docs.bfl.ai read 2026-09-06 · verified |
| FLUX.2 table: "FLUX.2 [klein] 4B | from $0.014". The page's worked example: "a 2MP image with Klein 4B costs $0.014 + $0.001 = $0.015", so the second megapixel adds $0.001. | | | | |
| DeepInfra | 0.014 per_image | resolution 1024x1024 | $0.014 as stated at 1024x1024 | api.deepinfra.com read 2026-09-19 · feed |

## Provenance

 - Quality: https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset, licensed cc-by-4.0.
 - Prices: https://docs.bfl.ai/quick_start/pricing , https://api.deepinfra.com/models/list
 - Built 2026-09-19 from the catalogue snapshot in this repository.

Arena Leaderboard Dataset by Arena (lmarena-ai), https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Filtered to the "overall" category; no scores were altered.