What's new? — September 2026
The key recent Claude releases, with a link to the relevant module.
New
🦋 Fable 5.1 (Sep. 1)
The new quality ceiling: beats Fable 5 and Opus 5, same price ($10/$50) but cache reads 4× cheaper — up to −45% on agentic missions. Finer guardrails, included on Max. → Module 02
New
🔏 Text watermark (Sep.)
With Fable 5.1, every text Claude produces carries an invisible statistical watermark that cannot be turned off; generated files get C2PA metadata. It proves Claude was involved, not authorship. → Module 13b
New
🌐 Claude in Chrome GA (Aug. 26)
Every paid plan. Claude chains actions without per-step approval, a classifier validating each one; admin-approved domains, manual mode kept. → Module 07
New
🔗 Unified memory chat ↔ Cowork (Aug. 25)
One memory for chat and Cowork, as editable per-topic files. Sensitive topics stay excluded by default (explicit opt-in). → Module 13
🔄 The loop shift (August)
You no longer hunt for the right prompt: you write a loop with a stop criterion the machine verifies on its own, and Claude retries until it is met. New dedicated module: when to prompt, when to loop, and how to start without risk. → Module 03 ter
🌐 Cowork in Chrome (Aug. 12)
The extension's side panel becomes a Cowork session: Claude reads your tabs, clicks, fills out forms, and the task carries on to desktop or mobile. Max and Team, Pro rolling out. → Module 07
🎥 Record a Skill (July)
You do the task on screen while narrating it and Claude writes the Skill. Not a line to draft. Cowork in Claude for Mac, Pro, Max and Team plans. → Module 11
🧠 Opus 5 (Jul. 24)
Close to Fable 5's intelligence at half the price ($5/$25), 1M context, thinking on by default, verifies its own work. New default on Max. → Module 02
🚀 Cowork on web and mobile (Jul. 7)
Cloud sessions tied to the account: work continues with the machine off, synced across devices. → Module 05
🦋 Fable 5 restored (Jul. 1)
Global return after June's export suspension, with a new safety classifier. → Module 02
⚡ Sonnet 5 (Jun. 30)
Close to Opus 4.8 at 40% of the price — and the $2/$10 per MTok launch price is now permanent. Default model. → Pricing
🏷️ Claude Tag (Jun. 23)
Claude becomes a team member in Slack, delegable by @mention. Team/Enterprise beta. → Module 10
🔁 Claude Code: Routines & more
Cloud routines, /ultrareview, dynamic workflows, sandboxed built-in browser, automatic memory. → Module 06
📊 Microsoft 365 GA (May 7)
Word, Excel, and PowerPoint generally available, Outlook in beta, context shared across apps. → Module 09
🧠 Memory revamped (Jul. 10)
Categorized entries updated mid-conversation; Monthly Recap (Reflect) in beta. → Module 13
🛡️ Enterprise governance
Self-service Enterprise, RBAC, model entitlements, Compliance API, HIPAA-ready. → Module 13b