Before it
Small models were assumed to be weak, and useful mainly for cheap tasks.
The problem
Phones and laptops cannot run a 70B model, but their users want capable assistance.
What it introduced
A 3.8B model trained on heavily filtered and synthetic data, performing near models ten times its size.
Why it matters
It pushed the data-quality thesis to its edge and made on-device assistants credible.
What modern models inherit
On-device capability through data curation rather than scale.
What came next
The phi series continued; every lab now ships a small model tuned on synthetic data.