Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.257 ·

New telemetry for unrecognized/unserved model spellings at startup

Startup now reports when an org's default model name is unrecognized or a requested family spelling went unserved.

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaModelswhat it touches
KindInternal Changesin v2.1.257,
Under the hood No documentation found

Startup now reports when an org's default model name is unrecognized or a requested family spelling went unserved.

Startup model resolution now tracks two new conditions: whether the org's default model name is unrecognized, and whether a "family spelling" requested by the user went unserved (family_spelling_unserved). Both are now reported as telemetry outcomes.

Read from
Names in the bundlefamily_spelling_unserved

See this entry in the whole of v2.1.257 →