ComfyUI error: Out of memory

Use flux1-dev-kontext_fp8_scaled.safetensors (source).

Flux Kontext image editing

Instruction-based image editing with Flux.1 Kontext Dev.

Estimated VRAM

~23.8 GB — ⚠️ ESTIMATE (unverified real-world usage). Estimate, not a measured figure: weight-size floor = flux1-kontext-dev.safetensors (23.8 GB, sizes verified on Hugging Face/GitHub). Activations add more; ComfyUI offloading can reduce it. Source, checked 2026-10-13.

Models required

flux1-kontext-dev.safetensors — 23.803 GB ✅ verified 2026-10-13 (listing) → models/diffusion_models

Tested GPUs

No verified test reports yet.

Nodes

UNETLoader LoadImage FluxKontextImageScale ReferenceLatent KSampler

Common errors & fixes

Out of memory: Use flux1-dev-kontext_fp8_scaled.safetensors (source). ✅ per source

Low-VRAM tips

⚠️ General guidance, not individually verified.

fp8 scaled Kontext model

Source & credit

Workflow by comfyanonymous (ComfyUI_examples). Get it from the original: https://comfyanonymous.github.io/ComfyUI_examples/flux/. License: FLUX.1 [dev] Non-Commercial License.