Claude Code Default Model Upgraded to Claude Sonnet 5, Natively Supports 1M Token Context
Decision Brief
What changedClaude Code v2.1.197 introduces Claude Sonnet 5 as the default model with native 1M token context window and promotional pricing until August 31.
Why it mattersThis default model upgrade boosts context capacity and adjusts pricing, directly impacting AI builders' model selection and cost planning.
Who should careAI coding tool users
Affected stackClaude Code
Builder actionUpgrade
Source confidenceHigh · Official release / blog / repo
Claude Code released v2.1.197, making Claude Sonnet 5 the default model. It natively supports a 1M token context window for longer conversations and code. Anthropic also offers promotional pricing: $2 per million input tokens and $10 per million output tokens, valid until August 31. Users can access it by updating to v2.1.197.
Summary basis: official / RSS sourceUnless it says 'full article read', this summary is based only on publicly available content — it never pretends to have read restricted originals.
Sources
- Claude Code（GitHub Releases）
Claude Code release notes: new features, hooks, skills, and agent capabilities.
- Claude Code（GitHub Releases）