# apr tokenize
Tokenizer training pipeline (plan/apply) — BPE vocabulary learning
**Category**: Training
## Synopsis
```text
apr tokenize [OPTIONS]
```
## Example
```bash
apr tokenize "Hello world" --tokenizer qwen2.5-coder-1.5b
```
## Full help
Run `apr tokenize --help` for the complete option list.
## See also
- Source: [`crates/apr-cli/src/commands/tokenize.rs`](https://github.com/paiml/aprender/blob/main/crates/apr-cli/src/commands/tokenize.rs)
- Contract: [`contracts/apr-page-cli-tokenize-v1.yaml`](https://github.com/paiml/aprender/blob/main/contracts/apr-page-cli-tokenize-v1.yaml)