Claude Code v2.1.76 · 14 Mar 2026
Entry Kind: in v2.1.76, 14 Mar 26
Changes Section of the release
What
A new built-in slash command to view and set the model effort level directly from the REPL, without navigating into /config
Usage
/effort # Show current effort level
/effort medium # Set to medium
/effort max # Maximum reasoning depth (Opus 4.6 only)
/effort auto # Reset to automatic (default)Details
Effort levels: low medium high max auto Named levels are persisted to user settings (effortLevel settings.json ) auto Each level has a descriptive summary (e.g. "Balanced approach with standard implementation and testing") Evidence
/effort name: "effort", description: "Set effort level for model usage")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
How sure we are
One source agrees One thing we can check says the same as this entry.
Anthropic's release notes agree Added /effort slash command to set model effort level
See this entry in the whole of v2.1.76 →
Names in this entry
slash /effort Set the effort level : low to xhigh, max, ultracodeauto; status prints it. max and ultracode are session-only; the ultracodecache warning , if Claude Code shows one, Claude Code applies the new level to the next request in that turn. Before v2.1.242, Claude Code decided from a feature flag it fetched from Anthropic whether to run the command mid-turn or queue it until the turn finished, and always queued it in a session that doesn't fetch feature flags , such as on a third-party provider . Works in -p
slash /config Open the Settings interface to adjust theme, model, output style , and other preferences. Pass one or more key=value pairs to set a setting directly without opening the interface, for example /config thinking=false, /config theme=dark, or /config model=sonnet. The key=value form also works in non-interactive mode (-p) and from the Claude mobile app via Remote Control . The key=value form can't turn on a setting that needs your confirmation in the panel, such as autoContinueAtUsageLimit/config --help to list the keys it accepts. Alias: /settings
setting low A new modelSettings config key stores an effort level per model, from low to xhigh.
setting medium Workflow size now defaults to medium, and an admin policy setting overrides whatever you chose.
setting high The bundled Claude API skill docs now target the new Opus, covering thinking defaults, fallbacks and fast mode.
setting max The bundled Claude API skill docs now target the new Opus, covering thinking defaults, fallbacks and fast mode.
setting auto You can set the auto-compact window at launch with --autocompact, using auto or 100k to 1M.
setting effortLevel Set a default effort level for models without a saved level of their own
setting settings.json Resumed sessions now carry your settings files along, with plugin registrations stripped out.
Anthropic's note
Upstream's own release notes for v2.1.76 name something this entry names, so the two are probably about the same change. Probably: the pairing is made on a shared name rather than on the words around it.
Added /effort
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Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.
In v2.1.76 Changes release-page order
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PostCompact Hook Event
