Anthropic's Opus 5.5 Appears to Be Rolling Out

Multiple users report Anthropic has quietly rolled out Opus 5.5, with some requests apparently routed to a new checkpoint and availability confirmed by an Anthropic engineer on Shopify's Bots platform; official launch is still pending.

2026-10-10 ~ 2026-10-12 · 3 related posts

• Opus 5.5 now available in Shopify Bots, confirmed by Anthropic engineer — Kyrannio · 2026-10-10
• Users spot unreleased 'Opus 5.5' model option on Anthropic's platform — koltregaskes · 2026-10-11
• Users report requests silently routed to a new Opus 5.5 checkpoint, unconfirmed — kimmonismus · 2026-10-12