FLUX.3 Image Klein

blackforestlabs/flux-3/klein/text-to-image

Black Forest Labs FLUX.3 Image Klein generates images with precise layout, style, and typography, or edits and composes up to ten references. Supports object placement, movement, removal, style transfer, and text editing. Optional labeled bounding boxes control the layout. Apply up to three FLUX.3 Klein-compatible .safetensors LoRAs with strengths from 0 to 4. LoRA requests use separate size-based pricing. Five square output sizes from 768px to 4K.

Image editing
Generation

Open in Studio Create an API key

Pricing

Includes our margin. Charged per request from your balance.

Per image

768×768: $0.0088
1024×1024: $0.0099
1536×1536: $0.012
2048×2048: $0.015
4096×4096: $0.04

Details

Provider: Black Forest Labs
Added: Oct 15, 2026

Options

Parameters this model accepts.

Resolutions: 768x768
1024x1024
1536x1536
2048x2048
4096x4096
Images per request: Up to 4
Input images: Up to 10
Input image formats: PNG, JPEG, WEBP
Max input image size: 30 MB

Use it from the API

Replace $HIDE_API_KEY with a key from the Developers page. Base URL https://hide.st/api/v1.

curl https://hide.st/api/v1/images/generations \
  -H "Authorization: Bearer $HIDE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "blackforestlabs/flux-3/klein/text-to-image",
    "prompt": "A lighthouse on a rocky coast at dusk, oil painting",
    "n": 1
  }'

Pricing

Per image

Details

Options

Use it from the API

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