v2.1.197

Source: Anthropic Claude Code Date: 2026-06-30 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.197

Summary

The release that ships Claude Sonnet 5 as the default model in Claude Code: native 1M-token context and promotional pricing of $2/$10 per Mtok through August 31. A one-line changelog for what is otherwise a major weight release — the harness update is the delivery vehicle, not the story.

Implications

Feeds the closed-frontier clock: this is the GA landing already tracked in the 07-01 daily (the gate clearing after the ~18-day Fable export-control freeze). It also feeds agent-layer autonomy indirectly — a 1M native context at $2/$10 promo pricing changes what’s economical to hand an agent as working context (full repos, long transcripts) without summarization, which is the precondition for the longer-horizon autonomous sessions the harness has been building toward across v2.1.197-201.