Claude Sonnet 5.5 Released with Official Build Guide

Claude Sonnet 5.5 发布，官方附上开发使用指南

Anthropic released Claude Sonnet 5.5 alongside a build guide. The guide covers choosing between Sonnet 5.5 and Opus 5.5, migrating from Sonnet 5 and adjusting the effort parameter, and using it in Claude Code. The post body is just a title and link—no performance numbers or timeline details are disclosed.

Why it matters: Anthropic drops a new model with a build guide, hitting all three HKR axes. But the post is title + link only — no benchmarks, latency, or pricing disclosed, so the actual improvement is unknown without reading the guide. Score capped at 78.