Claude Code v2.1.280 Released, Integrates Opus 5.5

Core summary

One sentence to understand this update

Claude Code v2.1.280 has been released, making Claude Opus 5.5 the default Opus model with 1M context and updated pricing.

Impact & opportunity

What this could mean

Developers integrating with Claude APIs should note the new default model, its context window, and pricing for optimal usage.