# Amp — Amp Now Uses Claude Sonnet 4

- Company: Amp (ampcode.com)
- Announced: 2025-05-22
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://ampcode.com/news/default-claude-sonnet-4
- Record: https://forck.live/items/7841-amp-now-uses-claude-sonnet-4
- Subject: Amp
- Models affected: Claude Sonnet 4

Amp has switched its primary model to Claude Sonnet 4, which it describes as faster, more stable, smarter at tool calling, more willing to invoke tools in parallel, better at recovering from errors, and generally more trustworthy.

## Evidence

Verbatim from https://ampcode.com/news/default-claude-sonnet-4:

> we've switched Amp's primary model to be Claude Sonnet 4.

---

Record: https://forck.live/items/7841-amp-now-uses-claude-sonnet-4
Catalogue: https://forck.live/llms.txt
Current issue: https://forck.live/feed.md