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Claude Code v2.1.237: Built-In Concise Output Style and a Prompt Caching Fix for LLM Gateways

Claude Code v2.1.237 adds a built-in Concise output style that leads with results and skips preamble, and fixes prompt caching for sessions using an LLM gateway or custom base URL.

August 20, 2026 • 10 min read • By ClaudeWorld

Claude Code v2.1.237 is a small release with two changelog entries: a new built-in “Concise” output style and a prompt caching fix for sessions that use an LLM gateway or a custom base URL.

What’s New

Built-In “Concise” Output Style

A new built-in “Concise” output style has Claude lead with results and skip preamble and narration, while doing the work just as thoroughly. Select it under Output style in /config.

Prompt Caching Fix for LLM Gateways and Custom Base URLs

Prompt caching has been fixed for sessions that use an LLM gateway or a custom base URL.

How to Update

  1. Check your installed version: claude --version
  2. Update in place: claude update
  3. To try the new style, select “Concise” under Output style in /config.