Change stream · Claude Platform release notes
Thinking blocks produced by Claude Fable 5.1 and Claude Mythos 5.1 are preserved only for the model that produced them or a newer one: earlier models can't read them, an…
1 Sep 2026 · Anthropic Claude
No access to your tenant or devices. Every item links to its source. What this means
Change stream · Claude Platform release notes
1 Sep 2026 · Anthropic Claude