# Configure weighted traffic splits for Vercel Flags from the Vercel CLI

**Published:** May 21, 2026 | **Authors:** Chris Widmaier

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You can now configure weighted traffic splits for [Vercel Flags](https://vercel.com/docs/vercel-flags) with the new `vercel flags split` command in the Vercel CLI. This allows you to send a percentage of traffic to one variant and the rest to another.

Run the command interactively, or pass the environment, bucketing attribute, and variant weights as flags:

```bash
vercel flags split redesigned-checkout \
  --environment production \
  --by user.id \
  --weight off=95 \
  --weight on=5
```

Update to the latest version of the [Vercel CLI](https://vercel.com/docs/cli) and read the [documentation](https://vercel.com/docs/cli/flags#configuring-a-weighted-split) to get started.

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