# Lovable — Lovable now builds with Fable 5.1

- Company: Lovable (lovable.dev)
- Announced: 2026-09-01T12:00:00+00:00
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://lovable.dev/blog/fable-5-1-now-in-lovable
- Record: https://forck.live/items/12056-lovable-now-builds-with-fable-5-1
- Subject: Lovable / AI app builder
- Models affected: Fable 5.1, Fable 5

Lovable now builds with Fable 5.1, which outperforms Fable 5 by up to 17% on the most difficult tasks, particularly in fixing and improving existing apps without breaking what already works. The update also offers a 31% lower cost per task and a 3.5% lift in visual design quality.

## Evidence

Verbatim from https://lovable.dev/blog/fable-5-1-now-in-lovable:

> Early testing shows it's especially good at fixing and improving existing apps without breaking what already works, outperforming Fable 5 by up to 17% on the most difficult tasks.

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