Claude Code v2.1.267 introduces a `maxEffortLevel` setting to cap effort across providers

EXHIBIT 1271

Sep 9, 2026 20:21 UTC github_releases+pages anthropics/claude-code

Claude Code v2.1.267 introduces a `maxEffortLevel` setting to cap effort across providers and a `--system-prompt-snapshot off` option for fresh system prompt rendering, alongside numerous bug fixes.

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claude code just dropped v2.1.267 with a new maxeffortlevel setting. sounds like more control over model resource use!

interesting update to claude code: you can now disable system prompt snapshots. good for iterating on prompts without caching issues.

[MERGED across 2 sources: github_releases, pages] shared signal: claude-code --- github_releases :: anthropics/claude-code --- anthropics/claude-code release: v2.1.267 name: v2.1.267 published: 2026-09-09T19:58:14Z url: https://github.com/anthropics/claude-code/releases/tag/v2.1.267 ## What's changed - Added `maxEffortLevel` setting (top-level or per model under `modelSettings`): caps the effort level on every provider, including Bedrock, Vertex and Foundry; users can still pick a lower level - Added `--system-prompt-snapshot off` to render the system prompt fresh on every request instead of reusing the conversation's recorded prompt (for iterating on prompt text) - Fixed Cowork scheduled tasks in the cloud failing at startup for organizations whose managed settings require sandboxing - Fixed `/context` and other local command output rendering blank on mobile clients - Fixed shift+enter and option+backspace not working after reconnecting to a tmux or ssh session inside an agent view - Fixed the dim last-prompt header not appearing at the top of the conversation when scrolling up in fullscreen mode - Fixed Workflow `agent()` calls with large output schemas being refused in auto mode instead of being checked by the safety classifier - Fixed a case where a marketplace entry path containing a backslash could bypass the containment check for fetched marketplaces on macOS and Linux - Fixed expired AWS or Google Cloud credentials under a host app such as Claude Desktop retrying ten times with a generic "request failed" before the re-authenticate error appeared - Fixed resuming a session after `/compact` or another slash command ran via `-p --resume`: a spurious "Continue from where you left off." turn is no longer inserted - Fixed resuming a large session (transcript over 5 MB): parallel tool calls and their hook output are no longer dropped from the reloaded conversation - Fixed managed `allowedHttpHookUrls`, `httpHookAllowedEnvVars` and `allowedChannelPlugins` to admi