Index Input Switch

The two-way Input Switch handles "A or B." Nifty Index Input Switch handles "A through P": one integer index routes between up to 16 inputs of any type, and the auto-growing values list adds a new slot every time you connect another wire.

The 1–16 index is the whole interface - 1 passes value1, 2 passes value2, and so on. Because the selector is a plain INT, you can drive it from anywhere: a slider, a widget, a Nifty Math expression, even the index output of another switch. That's the "data-driven" bit - your workflow's routing can be computed rather than hard-coded.

The lazy part

Like the rest of the Nifty logic suite, this is the lazy variant: only the input at the selected index is evaluated, and the other fifteen never run. That's the difference between a router you can trust and one that executes sixteen expensive branches. If the index points at an unconnected slot, output is None - which is exactly the signal you want feeding a fallback chain or an Is None check.

Where you'll use it

• Preset-ish selection. Sixteen different models, latents, or prompts; pick by index from a config value.
• Round-robin and parity tricks. Drive the index with frame % N and a batch rotates through alternatives.
• Config-driven graphs. A single INT upstream steers which branch of the workflow actually computes - cheap, readable, and lazy, so only the chosen path costs anything.

If you're tired of remembering "index 4 = the red one," the Index Combo Switch replaces the raw number with a named dropdown - same routing, human-readable labels.

Install

Nifty Nodes is a recent v3-API pack; install via ComfyUI Manager (search "Nifty Nodes") or:

cd ComfyUI/custom_nodes
git clone https://github.com/Stibo/comfyui-nifty-nodes

Restart ComfyUI. No extra dependencies. The eager twin, Nifty Index Input Switch (Eager), exists if you need every branch to run regardless - but for routing, lazy is what you want.