---
title: Amp Now Uses Claude Sonnet 4
link: https://ampcode.com/news/default-claude-sonnet-4
source: ampcode-com
published: 2025-05-22T00:00:00Z
updated: 2025-05-22T00:00:00Z
first_seen: 2026-10-04T12:50:30.804479567Z
summary: 'We''ve been using and tuning Amp with Claude 4 internally for weeks. Now that Anthropic has released it, we''ve switched Amp''s primary model to be Claude Sonnet 4. Amp is already designed to get the most power out of Claude 4. In our testing, we''ve found this new model to be: Faster More stable, less easily distracted Smarter at tool calling More willing to invoke tools in parallel Better at recovering from errors Generally more trustworthy To start using Claude 4 in Amp, update to the latest release of Amp''s VS Code extension or CLI. No settings changes are needed; see why we don''t make the user switch models.'
content: extracted
html: 2025-05-22-amp-now-uses-claude-sonnet-4.html
---

We've been using and tuning Amp with [Claude 4](https://www.anthropic.com/news/claude-4) internally for weeks. Now that Anthropic has released it, we've switched Amp's primary model to be Claude Sonnet 4.

Amp is already designed to get the most power out of Claude 4. In our testing, we've found this new model to be:

- Faster
- More stable, less easily distracted
- Smarter at tool calling
- More willing to invoke tools in parallel
- Better at recovering from errors
- Generally more trustworthy

To start using Claude 4 in Amp, update to the latest release of Amp's VS Code extension or CLI. No settings changes are needed; see [why we don't make the user switch models](https://ampcode.com/fif#model-selector).