| File | t5xxl_fp8_e4m3fn.safetensors |
| What it is | T5-XXL FP8 (text encoder) |
| Size | 4.9 GB |
| Folder | ComfyUI/models/text_encoders/ |
| Loader node | a text-encoder loader: Load CLIP (CLIPLoader) for one encoder, DualCLIPLoader when the model takes two (FLUX.1: CLIP-L + T5-XXL) |
| Source | comfyanonymous/flux_text_encoders on Hugging Face |
Download t5xxl_fp8_e4m3fn.safetensors (4.9 GB)
Where to put it
Put the file in ComfyUI/models/text_encoders/ (in the portable version: ComfyUI_windows_portable/ComfyUI/models/text_encoders/). Older guides say models/clip: that folder still works. Then press R in ComfyUI, or restart it, so the file shows up in a text-encoder loader: Load CLIP (CLIPLoader) for one encoder, DualCLIPLoader when the model takes two (FLUX.1: CLIP-L + T5-XXL).
If a workflow says “Value not in list” for this node, the file name in the workflow is different from yours, or the file is in another folder. Click the node and pick the file from the list.
What it does
A text encoder turns your prompt into numbers the model understands. It runs once per prompt, then ComfyUI can move it out of VRAM to make room for the image model — so it costs load time and system RAM more than speed.
This is a smaller FP8 version. It loads faster and needs about half the RAM of the 16-bit file; the difference in the pictures is usually hard to see. It is the version this site lists by default.
FP8 files load on every NVIDIA card in ComfyUI. On a Mac (Apple Silicon) FP8 does not load — use the 16-bit file there.
Models that use t5xxl_fp8_e4m3fn.safetensors
| Model | Type | Fits from | Runs well from |
|---|---|---|---|
| Chroma1-HD | image | 6 GB | 12 GB |
| FLUX.1 [dev] | image | 7 GB | 15 GB |
| FLUX.1 [schnell] | image | 7 GB | 15 GB |
| FLUX.1 Fill [dev] | image | 8 GB | 16 GB |
| FLUX.1 Kontext [dev] | image | 7 GB | 15 GB |
| FLUX.1 Krea [dev] | image | 7 GB | 15 GB |
| Stable Diffusion 3.5 Large | image | 8 GB | 12 GB |
| Stable Diffusion 3.5 Medium | image | 4 GB | 5 GB |
VRAM of the graphics card, for the model with the file this site picks for that card. Open a model to see every file and every GPU.
Other versions of this text encoder
| File | Precision | Size | Used by |
|---|---|---|---|
| t5xxl_fp8_e4m3fn.safetensors | FP8 | 4.9 GB | 8 models |
| t5xxl_fp8_e4m3fn_scaled.safetensors | FP8 | 5.2 GB | 3 models |
| t5xxl_fp16.safetensors | FP16 | 9.8 GB | 11 models |
Same encoder, different precision. Any of them works in the same loader node; pick one and select it in the node.
Tested with this file
I use this exact file in 5 of my free workflows, measured on an RTX 5060 Ti 16 GB:
- FLUX.1 [dev] — FP8 — 36.4 s per 1024×1024 image
- FLUX.1 [dev] — GGUF Q8_0 — 40.6 s per 1024×1024 image
- FLUX.1 [schnell] — GGUF Q8_0 — 9.4 s per 1024×1024 image
- FLUX.1 Kontext [dev] — FP8 — 53.3 s per edit (1024×1024)
- FLUX.1 Kontext [dev] — GGUF Q8_0 — 82.1 s per edit (1024×1024)
Not sure your card can run these models? Check your GPU. All shared files: ComfyUI model files.
Size and source read from Hugging Face (2026-10-01).