Releasesby GlyphPer-message effort changes beta expands to Claude on Google Cloud
Per-message effort changes are now available in beta on Google Cloud for Claude Fable 5.1, Claude Mythos 5.1 and Claude Opus 5, using the same mid-conversation-output-config-2026-07-01 beta header.
Also shipped Sep 3, 2026Anthropic in September 2026 →
Conversational analytics now supports questions about market basket analysis
Conversational analytics now supports questions about market basket analysis . This feature is generally available (GA).
External lineage (General availability)
External lineage is now generally available and is no longer in Preview .
Restricted Session Scope for agents (General availability)
With this release, Restricted Session Scope (RSS) is generally available. An RSS is a privilege ceiling that limits what an agent can do on behalf of a user. It intersects with RBAC and never grants privileges the user doesn't already have through their roles.
Share metric views with OpenSharing (Beta)
You can now share metric views with Databricks users in other metastores or accounts using OpenSharing. See Add metric views to a share and Read shared metric views .
Genie One enhancements
- Ask Genie button hidden when unsupported : In embedded dashboards, the Ask Genie button is now hidden when it isn't supported. See Ask Genie in embedded dashboards . Push notifications for scheduled tasks (Public Preview) : The Genie mobile app can now send push notifications for scheduled tasks to iOS devices. See Push notifications .
Web search in Genie One (Beta)
Genie One can now search the public web to answer questions that need current information, such as recent releases, third-party documentation, or news. Genie One decides when to search and cites the sources it uses, showing each as a link you can open. See Search the web .
More from Claude PlatformEvery Claude Platform release →
ant CLI 1.30.0 adds ant apply to manage agents and resources as code
ant apply creates and updates agents, environments, skills, memory stores and deployments from files in a repository after you approve a printed plan. A committed claude-lock.json lets later local or CI runs update the same resources instead of creating new ones.
Claude Fable 5.1 launches alongside Claude Mythos 5.1 with 1M token context
Claude Fable 5.1 succeeds Claude Fable 5 for long-running agentic coding, knowledge work and research, with Claude Mythos 5.1 for Project Glasswing participants. Both have a 1M context, 128k output and adaptive thinking at $10 / $50 per MTok, with cache reads cut to $0.25 per MTok.
Prompt cache reads on Claude Fable 5.1 and Mythos 5.1 drop to $0.25 per MTok
Cache reads on Claude Fable 5.1 and Claude Mythos 5.1 cost 0.025x the base input price instead of the usual 0.1x, which lowers the cost of cache-heavy agent workloads. Cache write pricing is unchanged.
Claude Fable 5.1 and Mythos 5.1 reject tool_choice any and tool
On Claude Fable 5.1 and Claude Mythos 5.1, tool_choice types any and tool return a 400 error while auto and none are unchanged. Use strict tool use or structured outputs to guarantee schema-conformant tool inputs.
Claude Fable 5.1 thinking blocks only replay to the same or newer models
Thinking blocks from Claude Fable 5.1 and Mythos 5.1 can't be read by earlier models and are dropped if replayed to them. Fable 5.1 also checks that nothing before a replayed block has changed, which matters for agents that edit conversation history.
Per-message effort changes enter beta on the Claude API
A role system message carrying output_config.effort inside messages changes effort for later turns while preserving the prompt cache, on Claude Fable 5.1, Mythos 5.1 and Opus 5. Requests need the mid-conversation-output-config-2026-07-01 beta header.
Claude API adds turn-scoped system messages in beta
Setting clear_at next_user_message on a mid-conversation system message renders it for the current turn only, then keeps it in history at no token cost. Per-turn reminders no longer accumulate or invalidate the prompt cache and later thinking blocks.
Claude API thinking.display adds an updates mode in beta
The new updates value, behind the thinking-display-updates-2026-08-18 header, returns reasoning empty like omitted but surfaces the short progress updates Fable and Mythos models write between tool calls as text.