Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

Effort slider can show what each level costs

Not switched on
Useful3 Signal4
Thinking Effort

The thinking-effort picker can show what each level costs relative to the default.

Effort cost labels sit behind a remote flag that falls back to off in this build.

Feature flag
tengu_marbled_teal Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.224: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.224. It isn't a statement about your account. What a flag value here can and cannot tell you

What

The thinking-effort picker gains a description line under each level: the default level is labelled as the default, and the others show an estimated multiple of the default's cost taken from the model's cost index. When shown it replaces the warning about overthinking at the top level. It is behind the remote flag tengu_marbled_teal, which falls back to off in this build, so whether you see it is decided by server config.

Evidence

The default effort for this model

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.224 →