---
title: "What's new in Claude Sonnet 5 — Stuff That Spins"
description: "What's new in Claude Sonnet 5 Claude Sonnet 5 came out this morning . I always head straight for the \"what's new\" developer docs because they tend to have more actionable information than the official announcement post. Anthropic say of Sonnet 5 that \"its performance is close to that of Opus 4.8, b…"
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date: "2026-06-30T21:23:02+00:00"
modified: "2026-07-02T18:13:26.407521+00:00"
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---

# What's new in Claude Sonnet 5

**Source:** Unknown  
**Published:** June 30, 2026  
**Original:** https://simonwillison.net/2026/Jun/30/claude-sonnet-5/#atom-everything  

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