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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.312 ·

/effort handles 'default' and 'auto' better and tracks the effort sent

/effort now reads 'default' and 'auto' from what you typed, its auto keyword comes from a helper, and sessions record the effort sent each turn

Group of 4 Use it now Improvements
JSON All of v2.1.312
Use it nowTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
EffortArea: what it touches
ImprovementsKind: in v2.1.312,
What probably matters to youSection of the release

Unclear It is not known what other word can replace auto or when, so it is unclear what to type in those setups.

What

The /effort command sets how much effort the model spends on its answers. Several things around it changed.

  • The check for default or auto now looks at the trimmed text you typed, plus one extra check. Before, it tested a variable that was never set, which looks like a bug.
  • The usage text, suggestions and the tip about switching away from max now get the auto keyword from a function instead of the fixed word auto, so the word can differ. The default option reads "Use the default effort level for your model".
  • When a reply starts, the session now records the effort that was sent and the effort for the turn, from sentEffort, turnEffort and effort.

Why

/effort default and /effort auto may now work where they did not before. The name of the auto option can vary, so check the usage text if it looks different.

Read from
Names in the bundle/effort
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Added since A small documentation edit on anthropic-managed touched a line naming /effort after this was published. * [Effort](https://platform.claude.com/docs/en/build-with-claude/effort) build-with-claude/claude-models-on-google-cloud/anthropic-managed see the edit
Confirmed since Anthropic's documentation has since written up /effort, on Model configuration. When Claude Code sends no effort level to a [supported model](#adjust-effort-level), the [API's default](https://platform.claude.com/docs/en/build-with-claude/effort) applies instead of Claude Code's. To have Claude Code send none, start `… model-config see the edit
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not known what other word can replace `auto` or when, so it is unclear what to type in those setups.
Anthropic's documentation agreesAnthropic's documentation has since written up /effort, on Model configuration.
Anthropic's release notes agreeFixed the /model and /effort cache warning saying the re-read waits for your next message; a change made while Claude is working can trigger…

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