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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.222 ·

/btw side questions show a fallback-model notice

Side questions now show a banner naming the original and fallback model instead of switching silently.

You'll notice New Features
JSON All of v2.1.222
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Slash CommandsArea: what it touches
New FeaturesKind: in v2.1.222,
New FeaturesSection of the release
What

When a side question falls back to a different model, the answer is now preceded by a warning banner naming the original and fallback models instead of silently switching.

Details
  • The side-question flow returns a refusalFallback object carrying the original model, the fallback model and the notice content alongside the response.
  • The UI renders the banner above the answer only when a fallback is present.
  • The control-request response carries the same information as refusal_fallback with original_model, fallback_model and content fields.
Evidence

fallbackNotice

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

Read from
Names in the bundle/btw

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