Change stream · Claude Platform release notes
Prompt cache reads on Claude Fable 5.1 and Claude Mythos 5.1 cost $0.25 USD per million tokens: 0.025x the base input price, compared with 0.1x on other models.
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