Follow Discord
Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Startup telemetry now classifies where the active model came from

Startup telemetry classifies how your active model was defined and selected.

Under the hood Internal Changes
JSON All of v2.1.251
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.251,
Internal ChangesSection of the release
What

Two new helpers label the active model by how it was defined, such as the compiled catalog, a legacy entry, an environment-supplied custom option, a tier pin, or gateway discovery, and by how it was selected, such as an org default, an entitlement default, a CLI flag or an SDK option.

Details
  • Computed on every startup with no flag; unrecognized is used when neither classification matches.
Evidence

model_definition_source

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

See this entry in the whole of v2.1.251 →

Feedback