AI-Toolkit (Ostris)
Modern training framework — Flux, SDXL, SD3 LoRAs in YAML.
OPEN SOURCE16–24 GB VRAM
VRAM fit16–24 GB
DATASHEET // FLUXGYM
FluxGym
Dead-simple Flux LoRA training in a Gradio UI.
OPEN SOURCE12–20 GB VRAMRuns locally
Actually FreeNo SignupOpen SourceWatermark-FreeHobbyist-OK
Visit FluxGymUPDATED 2026-04-05 · DIRECT LINK
HARDWARE REQUIREMENTS //
Runs locally · Mid GPU (12 GB)
Min VRAM
12 GB
Rec. VRAM
20 GB
Min RAM
32 GB
Rec. RAM
64 GB
Disk
40 GB
GPU class
Mid GPU
12.1+Apple Silicon ✓GPU RequiredQuant: FP8
12 GB preset is genuinely usable, just slow; 20 GB is the comfortable spot.
[ EDITORIAL PICK ]
Why we recommend FluxGym
- Open source
Source is public — you can audit it, fork it, and you'll never lose access to your workflows if FluxGym the company changes direction.
- Runs on 12 GB
Comfortable on a mid-range consumer card — no need to remortgage for an A100.
- Apple Silicon
Native Metal / MPS support — runs on M-series Macs without CUDA gymnastics.
- Beginner-friendly
You don't need to read a paper before getting your first result — sensible defaults and a quick install.
[ EVIDENCE NOTE ]
Documentation-led datasheet
This page summarizes upstream documentation, release information, and editorially reviewed catalogue fields. It is not presented as a hands-on benchmark. Verify changing requirements at the official project; report stale data through our corrections channel.
AT-A-GLANCE SIGNALS //
DERIVED FROM THIS PAGE'S DATA- Install difficultyStandard
A standard local install — download, install dependencies, point at your GPU.
- Hardware comfortMainstream
Needs 12 GB minimum — RTX 3060 12GB or 4070 territory.
- EcosystemOpen source
Source is public — auditable and forkable, no vendor lock.
- VerificationAgeing
102 days since the last catalogue refresh — flagged for re-verification.
[ COMMUNITY GUIDES & WORKFLOWS ]
Tutorials & deep-dives for FluxGym
Hand-picked from YouTube, Reddit, GitHub, and the wider web. Each link goes straight to the source — we don't intercept or rewrite anything.
[ MORE IN THIS NICHE ]
Other training & fine-tuning tools we rate
Three picks across different tradeoffs — so you don't end up with three near-clones of FluxGym.
What is FluxGym?
FluxGym is the friendly face of Flux LoRA training. Web UI on top of Kohya's scripts and AI-Toolkit; drag-drop images, name your concept, hit train. The easiest path from 'I have 15 photos of my dog' to a working Flux LoRA.
Pros & cons
✓ PROS
- Genuinely one-click: install, drop images, train
- Three VRAM presets (12 GB / 16 GB / 20 GB) tuned out of the box
- Active updates following the Flux model ecosystem
– CONS
- Less control than AI-Toolkit or raw Kohya
- Locked to Flux — no SDXL / SD3 training
What's actually free?
Apache 2.0.
✓ Actually FreeNo SignupOpen SourceWatermark-Free