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 v2.1.251 Home All releases olderv2.1.250
Claude Code v2.1.251

Startup telemetry now classifies where the active model came from

Under the hood
Useful1 Signal3
Telemetry

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

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 →