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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.278 ·

Billing notice for auto mode classifier fallback

Auto mode now shows a dialog explaining when a session isn't eligible for classifier billing changes, with telemetry to match

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal4worth watching, 1 to 5
AreaAuto Modewhat it touches
KindIn Developmentin v2.1.278,
Group of 2 Nothing to try yet Notable

Auto mode now shows a dialog explaining when a session isn't eligible for classifier billing changes, with telemetry to match

What

  • Claude Code now shows a new dialog when auto mode's tool-call classifier falls back from the server-side classifier to the local one. It tells you Claude Code is changing auto mode to stop charging for classifier requests, but explains that your current session isn't eligible for that change, so this classifier request is still billed as before.
  • The dialog appears when the server-side (third-party) classifier has already been refused earlier in the session and a tool call falls back to the local, billed classifier. You can press Enter to continue (and accept the billed request) or Escape to cancel the tool call, which is recorded with the reason "Cancelled at the classifier billing notice."
  • New analytics events were added to track when the server-side classifier fails to return a result and auto mode falls back to local classification, and when this new billing notice is shown or closed.

Why

This makes it clear to users when a specific auto-mode session still incurs classifier billing despite an upcoming change to stop charging for these requests, and gives them the choice to cancel rather than proceed with a billed request they didn't expect.

Read from
Feature flag
tengu_velvet_heron Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.278: 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 v2.1.278. It isn't a statement about your account. What a flag value here can and cannot tell you

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 doubtThe three related gates (`tengu_velvet_heron`, `tengu_auto_mode_server_fallback_notice`, `tengu_auto_mode_server_fallback_notice_closed`)…
The name it cites is new in this buildNew in this build: tengu_velvet_heron

See this entry in the whole of v2.1.278 →

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