Every FLUX model in October 2026: open, API-only, and which one to use

Black Forest Labs now sells and releases more than a dozen FLUX models, across two generations, open and closed, image and video. The names do not make it easy: [flex], [klein], Klein Base, Image Klein. This is the map as of October 18, 2026, built from their own release notes, with what each model is actually for.

If you only want the answer: running ComfyUI on your own GPU, use FLUX 3 Image Klein (I compared it with FLUX.2 Klein in a separate test).

Open weights: what you can run yourself

Model	Released	Size	Licence	Use it for
FLUX 3 Image Klein	Oct 15, 2026	5.6B	FLUX Kommunity License	the current best open FLUX: generation and editing, 16 steps
FLUX 3 Image Klein Base	Oct 15, 2026	5.6B	FLUX Kommunity License	training LoRAs (50 steps, CFG 3.5)
FLUX.2 [klein] 4B	Jan 15, 2026	4B	Apache 2.0	the simplest licence for commercial use
FLUX.2 [klein] 9B	Jan 15, 2026	9B	FLUX Non-Commercial License	superseded by FLUX 3 Image Klein
FLUX.2 [dev]	with the FLUX.2 launch	not stated by BFL	see its licence on Hugging Face	the large open FLUX.2

The licences differ more than the names suggest. Only FLUX.2 [klein] 4B is Apache 2.0. The FLUX Kommunity License for FLUX 3 Image Klein is new: read it on Hugging Face before using the model for paid work.

API only: what you pay per image

Model	Released	What it is	Price
FLUX 3 Image	Oct 1, 2026	the flagship: generation and editing in one endpoint, up to 10 references, up to 4K, layout boxes	$0.041 (768 square) to $0.607 (4K) per image
FLUX 3 Image Klein	Oct 15, 2026	the open model above, served by BFL with prompt upsampling	$0.008 to $0.036 per image
FLUX.2 [max]	Dec 16, 2025	highest-quality FLUX.2, can ground the image in live web results, up to 10 input images	see BFL pricing
FLUX.2 [pro]	Nov 25, 2025	the production workhorse; about 2x faster since March 3, 2026; up to 8 input images	from $0.03 per megapixel
FLUX.2 [flex]	Nov 25, 2025	the precision model for typography and fine detail; you control steps (up to 50) and guidance (1.5 to 10); up to 3x faster since January 29, 2026	see BFL pricing

Where [flex] fits

[flex] is the only FLUX model where you choose the step count and guidance strength over the API. That is useful when the picture is mostly text: posters, infographics, packaging, interface mockups. Raise the steps and guidance for tighter lettering, lower them for speed. For general images, FLUX 3 Image now does more for a similar budget, and FLUX 3 Image Klein got every word right in my lettering test for a fraction of the price.

Video

Model	Released	What it does	Price
FLUX 3 Video	preview Aug 4, 2026	up to 20 seconds at Full HD, 24 fps, with synchronized audio; text, image and video-continuation modes (continuation capped at 15 s since Aug 17)	per second
FLUX 3 Video 2K / 4K	Sep 10, 2026	2560 x 1440 and 3840 x 2176 output	from $0.40/s (2K) and $0.80/s (4K)
FLUX Video Upscale	Aug 20, 2026	1.5x to 3x upscale up to 4K, keeps the audio	$0.07 to $0.10 per megapixel-second

No FLUX video model has open weights. Black Forest Labs says open access to a FLUX 3 multimodal backbone comes "in a later phase", with no date.

Single-job tools (API)

Tool	Released	What it does
FLUX Erase	May 21, 2026	removes an object from a picture and a mask, no prompt
FLUX Outpainting	May 14, 2026	extends a picture in any direction up to 4 MP; a cheaper `fast` mode since June 9
FLUX Deblur	June 25, 2026	sharpens one blurry picture, no prompt, up to 4 MP
FLUX Virtual Try-On v2	July 17, 2026	puts a garment on a person; better faces and fabric than v1, input up to 4 MP

Retired

Flux Pro 1.0 endpoints and the old Finetuning API stopped on October 31, 2025. The Finetuning API has no replacement; for your own styles, train a LoRA on FLUX 3 Image Klein Base or FLUX.2 [klein] instead (BFL's API also serves your own [klein] LoRAs, in beta since April 23, 2026).

Which one should you use?

You want to	Use
Generate locally in ComfyUI, 8 GB card or more	FLUX 3 Image Klein, int8 file
Sell what you make, with the simplest licence	FLUX.2 [klein] 4B (Apache 2.0)
Train a style or character LoRA	FLUX 3 Image Klein Base
Pay per image for the best result	FLUX 3 Image
Lettering-heavy design work over an API	FLUX.2 [flex]
Video with sound	FLUX 3 Video

Prices and features change often. Everything in this article comes from Black Forest Labs' release notes and FLUX.2 page, checked on October 18, 2026. If a number has moved, tell me in the comments and I will update the table.