FLUX
By Black Forest Labs, founded by the researchers behind Stable Diffusion and latent diffusion itself. FLUX.2 spans a closed frontier tier and Apache-2.0 open [klein] variants.
The picks.FLUX models by Black Forest Labs
FLUX 3 Image Klein
Distilled open-weights model for fast image generation and editing
FLUX 3 Image
Native 4K image generation and editing with precise multi-reference control
FLUX Video Edit [fast]
Fast prompt-driven video editing that preserves the source clip's motion, timing, framing, and audio
FLUX 3 Video
Multimodal video generation with native synchronized audio across styles and modes
FLUX.2 [klein] 9B KV
KV-cache accelerated image generation and editing for real-time multi-reference workflows
FLUX 3 Image Klein Base
Undistilled open-weights foundation for fine-tuning and customization
FLUX 3 Upscaler
FLUX-powered video upscaling with precise and creative enhancement modes
FLUX Virtual Try-On
Low-latency virtual try-on for transferring garments onto a person image with strong identity and garment fidelity
FLUX.2 [max]
The latest state-of-the-art model from Black Forest Labs, generating images grounded in live web information.
FLUX.2 [klein] 9B Base
Undistilled foundation model for high-quality image generation and editing
FLUX.2 [klein] 4B Base
Compact undistilled model for efficient image generation and editing
Common questions
FLUX 3 Image Klein, released October 2026 per the live catalog. New FLUX releases join this page automatically when they land on Runware.
Yes — FLUX 3 Image Klein, FLUX.2 [klein] 9B KV, FLUX.2 [dev], FLUX 3 Image Klein Base and 10 more run on Runware's own optimized compute (the platform's open-weight tier, billed on compute time). Check each model page for license terms before self-hosting.
Production notes
Every price on this page is the model's published rate from the live Runware catalog, using the cheapest listed configuration unless stated otherwise. Prices vary with resolution, duration, quality tier, or token volume, so check the pricing table on each model page before estimating unit economics.
The Runware catalog does not publish per-model latency figures, so this page does not quote end-to-end timings. Where a model's own description commits to speed (for example sub-second generation or realtime streaming), that claim is repeated here. For anything else, benchmark the exact models in the Playground with your own payload sizes before committing to an SLA.
Models are addressed by versioned AIR identifiers, so a workflow pinned to specific model versions keeps producing the same behaviour as new versions ship. Adopt upgrades deliberately by re-running your evaluation set against the new version before switching production traffic.
About this collection
Black Forest Labs flagship image family. Strong prompt fidelity and consistency. Klein variants ship open weights under Apache 2.0. This page lists every FLUX model available through the Runware API, published by Black Forest Labs.
Membership is derived from the live Runware catalog: the 30 models on this page are the catalog's current FLUX releases, ordered by the catalog's own editorial weight and release date. Names, descriptions, pricing, capability chips, samples, and guides are all read live from the catalog — nothing here is hand-curated, and new FLUX releases join automatically when they land on Runware.
Everything on this page re-derives from the catalog on every visit. When Black Forest Labs ships a new FLUX model on Runware it appears here with no editorial lag; deprecated versions remain listed with their live status chip so version pins stay auditable.
Model guides.Learn how to use the stack
Prompting
How to prompt FLUX 3 Image Klein for text-to-image: writing a full scene caption, holding a layout with the seed, sizing up to 4K, and trading steps for speed.
Read the guide →Rendering text
How to render readable text with FLUX 3 Image Klein: quoting the exact words, controlling the text you didn't ask for, building a layout hierarchy, and editing signage.
Read the guide →Editing images
How to edit a photo with FLUX 3 Image Klein: scoping the change, removing objects, writing scene-wide edits as captions, reframing, and chaining edits.
Read the guide →Multi-reference composition
How to combine up to four references with FLUX 3 Image Klein: assigning roles, keeping a product across scenes, placing it in your own photo, and borrowing a style.
Read the guide →Bounding boxes
How to place, move and remove elements by region with FLUX 3 Image Klein: the 0 to 1000 grid, laying out a frame, reserving space for copy, and editing by box.
Read the guide →Prompting
How to prompt FLUX 3 Image for text-to-image: the five-part prompt structure, the detail that prompt expansion cannot invent for you, camera direction, and output size.
Read the guide →Rendering text
How to render readable text with FLUX 3 Image: quoting the exact string, directing the typography, building a text hierarchy, and editing copy inside an existing image.
Read the guide →Editing images
How to edit an image with FLUX 3 Image from a single reference: scoping the instruction, swapping materials and light, removing objects, reframing, and chaining edits.
Read the guide →Multi-reference composition
How to combine up to ten reference images with FLUX 3 Image: assigning a role to each one, holding a face or a product across scenes, and borrowing a look.
Read the guide →Bounding boxes
How to place and edit elements by region with FLUX 3 Image: the 0 to 1000 grid, composing a layout from scratch, moving a marked element, and removing one.
Read the guide →Editing video
How to edit a finished clip with FLUX Video Edit [fast]: one source video, one written instruction, and everything you did not mention arriving untouched.
Read the guide →Preparing source video
How to prepare source clips for FLUX Video Edit [fast]: the 15-second, 50 MiB and 720p envelope, what the output inherits, and how to work with footage that does not fit.
Read the guide →Changing the setting
How to relight a clip, move it to another season, or swap the background behind a subject with FLUX Video Edit [fast], without regenerating the shot.
Read the guide →Dialogue, on-screen text and localization
How to change what someone says with FLUX Video Edit [fast], translate a line into another language, and swap the on-screen text in the same frame.
Read the guide →Removing objects from video
How to take an object, a person or a sticker out of a clip with FLUX Video Edit [fast], naming what continues behind it so the fill holds for every frame.
Read the guide →Replacing and adding elements
How to swap a product, change wardrobe, or put something new into a clip with FLUX Video Edit [fast], and why an added object needs its light described.
Read the guide →Restyling a clip
How to convert footage into another medium with FLUX Video Edit [fast], from vector animation to film stock, while the performance and camera move stay exactly as shot.
Read the guide →Prompting FLUX 3
How to prompt FLUX 3 for text-to-video with synchronized audio: request shape, prompt rewriting, camera language, dimensions, style diversity, and the draft-mode iteration workflow.
Read the guide →Audio and speech with FLUX 3
How to compose FLUX 3's synchronized audio: layering ambient and effects, directing music by instrumentation and tempo, directing speech delivery, and rendering multilingual dialogue with clean lip-sync.
Read the guide →Multi-shot sequences with FLUX 3
How to build multi-shot video sequences inside one FLUX 3 generation: HARD CUT syntax, shot contrast, time compression, threading an audio bed across the cuts, and pacing shot rhythm.
Read the guide →Keyframes with FLUX 3
How to pin images to specific frame positions in FLUX 3 videos: opening on a source image, storyboarding across positions, ending on a packshot, morphing between two states, and using timestamps for beat-precise timing.
Read the guide →Video continuation with FLUX 3
How to continue a source clip from its final frames with FLUX 3's video input: single-clip continuation, chaining across multiple generations, deliberate source design, and recovering shots that didn't land.
Read the guide →Guidance and negative prompts
How to use CFG scale and negative prompts with FLUX 3 Image Klein Base: how guidance changes adherence, what a negative prompt removes, and what step count to run.
Read the guide →Upscaling video
How to upscale video with FLUX 3 Upscaler: the async request, choosing an upscale factor, the input size and length limits, and keeping motion and the original audio.
Read the guide →Steering the enhancement with a prompt
How to steer FLUX 3 Upscaler with an optional positivePrompt: name the materials and textures you want rebuilt so the enhancement favours the detail that matters.
Read the guide →Precise and creative enhancement
How to use FLUX 3 Upscaler's settings.creativity: precise, source-faithful sharpening for faces and brands, or creative detail restoration for scenery, textures, and crowds.
Read the guide →Virtual try-on
How to dress a person in any garment from a reference image with FLUX VTO. The call takes one person photo, one garment photo, and a short prompt.
Read the guide →Removing objects
How to remove objects from images with FLUX Erase, Black Forest Labs's prompt-less mask-driven removal model. What you paint is what disappears.
Read the guide →Extending images
How to extend an image past its original frame with FLUX Outpainting. No prompt, no mask, just more canvas around what is already there.
Read the guide →Related collections.More ways to build
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