fal

FLUX.2 [dev] Flash AI Image Editing Model

Fast distilled version of Black Forest Labs' FLUX.2 [dev] optimized for speed and cost efficiency.

2048 x 2048
Max Resolution
Input / Output
Text Image Image
Active

Details

Model ID
flux.2-dev-flash
Creator
fal
Family
flux.2
Released
December 2025
Max Input Images
4
Tags
image-generation text-to-image open-weights non-commercial
// Get Started

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Access flux.2-dev-flash via our unified API.

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Providers & Pricing (1)

FLUX.2 [dev] Flash is available exclusively through fal.ai, starting at $0.005/image.

fal.ai
fal/flux.2-dev-flash
Provider Model ID: fal-ai/flux-2/flash
$0.0050 /input megapixel

Provider Performance

Fastest generation through fal at 2,225ms median latency with 100.0% success rate.

Aggregated from real API requests over the last 30 days.

Generation Time

fal
2,225ms p95: 3,971ms

Success Rate

fal
100.0%
15 / 15 requests

Time to First Byte

fal
2,225ms
p95: 3,753ms

Provider Rankings

# Provider p50 Gen Time p95 Gen Time Success Rate TTFB (p50)
1 fal 2,225ms 3,971ms 100.0% 2,225ms
Data updated every 15 minutes. Based on all API requests through Lumenfall over the last 30 days.

FLUX.2 [dev] Flash API OpenAI-compatible

Integrate FLUX.2 [dev] Flash via Lumenfall’s OpenAI-compatible API to programmatically generate high-resolution images and perform complex image editing. This endpoint provides low-latency access to fast-distilled text-to-image capabilities for real-time media applications.

Base URL
https://api.lumenfall.ai/openai/v1
Model
flux.2-dev-flash

Text to Image Generate

Create images from text descriptions

curl -X POST \
  https://api.lumenfall.ai/openai/v1/images/generations \
  -H "Authorization: Bearer $LUMENFALL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux.2-dev-flash",
    "prompt": "A serene mountain landscape at sunset",
    "size": "1024x1024"
  }'
# Response:
# { "created": 1234567890, "data": [{ "url": "https://...", "revised_prompt": "..." }] }

Image Editing Edit

Transform existing images with text instructions

curl -X POST \
  https://api.lumenfall.ai/openai/v1/images/edits \
  -H "Authorization: Bearer $LUMENFALL_API_KEY" \
  -F "model=flux.2-dev-flash" \
  -F "[email protected]" \
  -F "prompt=Add a starry night sky to this image" \
  -F "size=1024x1024"
# Response:
# { "created": 1234567890, "data": [{ "url": "https://...", "revised_prompt": "..." }] }

Benchmarks

FLUX.2 [dev] Flash holds the #7 rank in the text-to-image arena with a competitive Elo rating of 1262. This distilled version achieves high-speed generation while maintaining elite status among leading diffusion models.

Lumenfall Arena
#6
Text-to-Image · 1262 Elo

Competition Results

Geometric Composition

Text-to-Image
#3/22
Prompt

“A glass cube on a wooden table. Inside the cube is a small blue sphere. On top of the cube sits a red book. A green plant is behind the cube, partially visible through the glass. Soft window light from the left.”

Generated
3 attempts – showing best result

Heroic Super Hero Portrait

Text-to-Image
#5/19
Prompt

“Hyper-photorealistic full-body portrait of a female superhero standing triumphantly on a New York skyscraper rooftop at golden sunset, wearing a classic modest superhero costume with flowing cape, chest emblem, gloves, and boots in red and blue colors, practical design, short hair, strong determined heroic expression looking into the distance, powerful confident stance with hands on hips and cape billowing dramatically in the wind, detailed urban cityscape background, warm natural sunlight with sharp shadows and fabric highlights, ultra-sharp textures on suit, hair, and concrete, 8K masterpiece, empowering family-friendly style.”

Generated
3 attempts – showing best result

Intricate Floral Mandala

Text-to-Image
#8/15
Prompt

“Perfectly symmetrical mandala made entirely of real flowers, petals, leaves, fruits, and seeds in vibrant natural colors, intricate layered patterns with radial symmetry, top-down view on a soft neutral background, hyper-detailed organic textures and subtle shadows, photorealistic, 8K masterpiece.”

Generated
3 attempts – showing best result

Apollo 11: Journey to Tranquility

Text-to-Image
#8/19
Prompt

“Create a clean, modern vector infographic poster about the Apollo 11 mission. NASA-inspired palette (navy, white, muted red, light gray). Flat-vector style, crisp lines, consistent iconography, subtle gradients only. Steps (stop at landing): 1. Launch (Saturn Vicon) 2. Earth Orbit (Earth + orbit ring icon) 3. Translunar (trajectory arc icon) 4. Lunar Orbit (Moon + orbit ring icon) 5. Descent (lunar module descending icon) 6. Landing (lunar module on the surface icon) Small supporting elements (minimal text): • Crew strip: three silhouette icons with only last names: Armstrong, Aldrin, Collins. • Landing site marker: Moon pin labeled "Tranquility" only. Layout constraints: generous margins, large readable labels, clean background with subtle stars. Vector-only, print-poster look, high resolution.”

Generated
3 attempts – showing best result

Fantasy Warrior

Text-to-Image
#11/19
Prompt

“Close portrait of a battle-worn paladin in ornate engraved plate armor, hair braided with small beads, faint scars and dirt on the skin, warm torchlight reflecting off metal, shallow depth of field, bokeh sparks, lifelike eyes, highly detailed texture on leather straps and cloth underlayer.”

Generated
3 attempts – showing best result

Adorable Baby Animals in Sunny Meadow

Text-to-Image
#9/23
Prompt

“Hyper-photorealistic scene of fluffy baby animals—a golden retriever puppy, tabby kitten, baby bunny, and red fox kit—with big expressive eyes and ultra-detailed soft fur, playfully chasing butterflies and tumbling together in a lush wildflower meadow, warm golden sunrise light with god rays and dew sparkles, joyful wholesome vibe, 8K masterpiece.”

Generated
3 attempts – showing best result

Isometric Miniature Diorama Scenes

Text-to-Image
#12/19
Prompt

“Create a clear, 45° top-down isometric miniature 3D cartoon scene of Japan's signature dish: sushi, with soft refined textures, realistic PBR materials, gentle lighting, on a small raised diorama base with minimal garnish and plate. Solid light blue background. At top-center: 'JAPAN' in large bold text, 'SUSHI' below it, small flag icon. Perfectly centered, ultra-clean, high-clarity, square format.”

Generated
3 attempts – showing best result

Candid Street Photography

Text-to-Image
#21/22
Prompt

“A candid street photo of an elderly Japanese man repairing a red bicycle in light rain, reflections on wet pavement, shallow depth of field, 50mm lens, natural skin texture, imperfect framing, motion blur from passing cars, cinematic but realistic, no stylization.”

Generated
3 attempts – showing best result
Archived results

Fantasy Warrior

Text-to-Image
#6/14
Prompt

“Close portrait of a battle-worn paladin in ornate engraved plate armor, hair braided with small beads, faint scars and dirt on the skin, warm torchlight reflecting off metal, shallow depth of field, bokeh sparks, lifelike eyes, highly detailed texture on leather straps and cloth underlayer.”

Generated
3 attempts – showing best result
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FLUX.2 [dev] Flash FAQ

How much does FLUX.2 [dev] Flash cost?

FLUX.2 [dev] Flash starts at $0.005 per image through Lumenfall. Pricing varies by provider. Lumenfall does not add any markup to provider pricing.

How do I use FLUX.2 [dev] Flash via API?

You can use FLUX.2 [dev] Flash through Lumenfall's OpenAI-compatible API. Send requests to the unified endpoint with model ID "flux.2-dev-flash". Code examples are available in Python, JavaScript, and cURL.

Which providers offer FLUX.2 [dev] Flash?

FLUX.2 [dev] Flash is available through fal.ai on Lumenfall. Lumenfall automatically routes requests to the best available provider.

What is the maximum resolution for FLUX.2 [dev] Flash?

FLUX.2 [dev] Flash supports images up to 2048x2048 resolution.

Overview

FLUX.2 [dev] Flash is a distilled, high-speed variant of Black Forest Labs’ FLUX.2 [dev] model, developed by fal. It is a text-to-image and image-to-image model architected to provide high-fidelity visual output with significantly lower latency and inference costs than the standard base model. By utilizing distillation techniques, it maintains the structural intelligence of the FLUX.2 architecture while requiring fewer sampling steps to produce a final image.

Strengths

  • Inference Speed: Significantly reduces generation time compared to the standard FLUX.2 [dev] model, making it suitable for near real-time applications and rapid prototyping.
  • Text Rendering: Retains the core architectural ability to render complex, legible text within generated images with high accuracy.
  • Prompt Adherence: Shows strong alignment with complex, multi-layered natural language prompts, following specific instructions regarding composition and object placement.
  • Cost Efficiency: With a starting price of $0.005, it offers a more economical pathway for developers to run high-volume image generation workloads without a proportional increase in compute spend.

Limitations

  • Non-Commercial License: Distributed under a non-commercial license, which restricts its use to research, hobbyist projects, and personal experimentation rather than production-grade commercial products.
  • Fine Detail Compression: As a distilled model, it may exhibit slightly less texture nuance or micro-detail in extremely complex scenes compared to the full-parameter version of FLUX.2 [dev].
  • Step Sensitivity: While optimized for fewer steps, pushing the model to extremely low step counts (e.g., 1-2 steps) may result in occasional artifacts not present in the standard dev model.

Technical Background

FLUX.2 [dev] Flash belongs to the FLUX.2 family of flow-matching transformer models. It employs a distillation process designed to compress the sampling trajectory, allowing the model to achieve convergence in a fraction of the iterations required by the original teacher model. This approach prioritizes computational efficiency while preserving the underlying latent representation space established by Black Forest Labs.

Best For

This model is ideal for developers building interactive creative tools, rapid ideation workflows, or research projects where low latency is critical. It is particularly effective for generating UI mockups, social media assets, or storyboard frames where fast iteration is more valuable than maximum-parameter rendering. FLUX.2 [dev] Flash is available for testing and integration through Lumenfall’s unified API and interactive playground.

Top Matchups

See how FLUX.2 [dev] Flash performs head-to-head against other AI image models, ranked by community votes in blind comparisons.

Try FLUX.2 [dev] Flash in Playground

Generate images with custom prompts — no API key needed.

Open Playground