What Happened
Anthropic released Claude Sonnet 4.5 and paired the model launch with product and platform upgrades (including improvements related to Claude Code and developer tooling).
Why It Matters
Sonnet 4.5 is a representative “frontier coding model” release: the announcement tightly couples model capability claims with the surrounding infrastructure needed for real agent workflows (IDE integrations, checkpoints, longer-running tasks).
Technical Details
- Model ID (API):
claude-sonnet-4-5(per announcement) - Focus: Coding, agents, and computer-use scenarios