Short answer (2026): Drop your LoRA files in ComfyUI/models/loras, add a Load LoRA node between your model loader and the CLIP/sampler, and set strength_model / strength_clip. To stack, chain multiple Load LoRA nodes (or use the Efficiency Nodes LoRA Stacker). Two gotchas cause 90% of "my LoRA isn't working": using a LoRA from the wrong base model, and forgetting the LoRA's trigger word.
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Where files go:
ComfyUI/models/loras - The node: Load LoRA (Add Node → Loaders → Load LoRA)
- Stacking: chain nodes, or the LoRA Stacker from Efficiency Nodes
- #1 fix: match the LoRA to your base model + include its trigger word
Step-by-step
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Place the LoRA
.safetensorsinComfyUI/models/loras— ComfyUI auto-detects it. - Add the Load LoRA node: double-click the canvas and search "Load LoRA," or right-click → Add Node → Loaders → Load LoRA.
- Wire it in: put the node between the diffusion model and the CLIP/sampler. Connect model→model and clip→clip through the LoRA node, then onward to your KSampler.
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Pick the LoRA in
lora_name(reads frommodels/loras). -
Set strengths:
strength_modelandstrength_clipcontrol how strongly it affects the image and the prompt understanding. Start around 0.6–0.8. - Add the trigger word to your prompt (see below), then generate.
Stacking multiple LoRAs
Two ways:
- Chain Load LoRA nodes — the model+clip output of the first feeds the input of the second, and so on into the KSampler.
- LoRA Stacker (Efficiency Nodes) — a single node where you load several LoRAs and set each strength. Cleaner for 2–3+ LoRAs.
Keep it disciplined: 2–3 LoRAs max, each 0.4–0.8, total under ~2.0 — beyond that they fight. For a full realism stack, see our best Flux LoRAs guide.
The two mistakes that make a LoRA "do nothing"
- Wrong base model. LoRAs are not interchangeable — an SD 1.5 LoRA won't work on an SDXL checkpoint, and neither works on Flux. Match the LoRA to your base model.
- Missing trigger word. Many LoRAs need a specific activation keyword. No trigger in the prompt → the LoRA just sits there. Check the LoRA's Civitai/Hugging Face page for its trigger.
Not set up with ComfyUI + Flux yet? Start with the install Flux in ComfyUI guide.
Frequently asked questions
Where do I put LoRA files in ComfyUI?
In ComfyUI/models/loras. ComfyUI auto-detects them, and they appear in the Load LoRA node's lora_name dropdown.
How do I stack multiple LoRAs in ComfyUI?
Chain multiple Load LoRA nodes in series (model+clip out → next node's in), or use the LoRA Stacker node from the Efficiency Nodes pack. Keep to 2–3 LoRAs with a combined strength under ~2.0.
Why is my LoRA not doing anything?
Two usual causes: the LoRA is for a different base model (SD1.5 vs SDXL vs Flux — they're not interchangeable), or you're missing the LoRA's trigger word in the prompt.
What's the difference between strength_model and strength_clip?
strength_model controls how strongly the LoRA changes the image generation; strength_clip controls how strongly it changes prompt interpretation. Most people set them equal (0.6–0.8) to start.
Conclusion
LoRAs in ComfyUI are simple once you know the pattern: right folder, Load LoRA node wired between model and sampler, sane strengths, correct base model, and the trigger word. Stack 2–3 for compound effects. What's in your go-to LoRA stack? Share below.
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