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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 v2.1.233 ·

Eval suites stop at the first authentication failure

An eval suite stops immediately when the first run is rejected for bad credentials.

You'll notice Improvements
JSON All of v2.1.233
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
PluginsArea: what it touches
ImprovementsKind: in v2.1.233,
ImprovementsSection of the release
What

If the very first run in an eval suite is rejected for bad credentials, the suite halts immediately rather than working through every remaining case and failing each one the same way.

Details
  • The stop is reported as auth_failed, with a new auth_preflight_failed alongside it; previously partial runs were always attributed to cost_ceiling.
  • The printed message points you at the credential error above and asks you to re-run.
Evidence

every remaining run would fail the same way, so the suite stops here. Fix the credential above and re-run.

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

See this entry in the whole of v2.1.233 →

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