FLUX.1 files and loaders: keep split weights and packaged FP8 checkpoints separate

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Purpose and scope

This reference covers native FLUX.1 text-to-image resource organization. dev, schnell, split weights and packaged FP8 checkpoints are different choices, not drop-in filenames for every graph.

Source-supported context

Official instructions list separate diffusion, CLIP-L, T5 and VAE components as well as a packaged checkpoint route. The file table here belongs only to the split dev example and links to documentation, not hosted downloads. Source 1 Source 2 Source 3

Before you start

1. The split dev route assigns distinct roles to flux1-dev, clip_l, t5xxl and ae.

2. schnell has its own weights and workflow/sampling choices.

3. A packaged FP8 checkpoint has a different loader path; FP8 alone does not establish interchangeability.

Steps and checks

The sequence below is an editorial procedure based on the cited context, not a diagnosis already confirmed for your environment.

Step 1. Choose one official template and record its loading scheme before downloading.

Step 2. Place split components in diffusion_models, text_encoders and vae as appropriate, ensuring DualCLIPLoader selects both correct encoder files.

Step 3. Complete any repository authorization using the corresponding account rather than equating a visible model card with granted downloads.

Step 4. Keep the example's model/sampling logic for a baseline supported by that workflow before changing quantization or adapters, recording file identity at each switch.

Completion check

Each file maps to the intended loader without empty CLIP or shape failures; execution still needs validation in the actual environment.

Limitations and cautions

No weight hashes were computed. Do not merge dev and schnell licensing assumptions. Third-party quantized/GGUF paths require their own author's instructions.

Files named by the source documentation

These are the selected documentation example's declarations, not inspected local files or direct downloads. No weights or checksum results are included; verify the revision for your task.

File	Directory category	Documented source
flux1-dev.safetensors	diffusion_models	Source
clip_l.safetensors	text_encoders	Source
t5xxl_fp16.safetensors	text_encoders	Source
ae.safetensors	vae	Source

Original sources

• FLUX.1 native workflows — original record checked 2026-09-21.
• ComfyUI model troubleshooting — original record checked 2026-09-21.
• Hugging Face gated models — original record checked 2026-09-21.

Localization prepared: 2026-09-22. The source-check dates above were inherited from the existing article; this translation does not claim they were all rechecked today. No GPU run, minimum-memory measurement or runtime guarantee is supplied.

Related troubleshooting and guides

• CLIP input is invalid: None — trace where the text encoder should come from
• A GGUF file will not load: match the architecture and the specialized loader
• Hugging Face 401 or 403: browser access and download-process authorization differ