---
pretty_name: Open PerfectBlend Cleaned
license: apache-2.0
---

# Open PerfectBlend Cleaned

This dataset is a filtered copy of `mlabonne/open-perfectblend`.

Removed rows:
- Prompt-only conversations with no assistant turn
- Rows whose assistant turn is present but empty/whitespace-only

Counts:
- Original rows: 1,420,909
- Removed rows: 62,144
- Remaining rows: 1,358,765

Reason:
These removed rows produce all-zero supervision masks in assistant-only training setups.