Releasesby GlyphThe Compliance API local session endpoints are out of beta for Claude for Microsoft 365 sessions in Excel
The Compliance API local session endpoints are out of beta for Claude for Microsoft 365 sessions in Excel, PowerPoint, Word, and Outlook (product_surface values beginning with office_agents). See Sessions on users' machines.
Also shipped Sep 24, 2026Anthropic in September 2026 →
DCM Projects capability updates
This release updates the availability of several DCM Projects capabilities. The following capabilities are now generally available: The following capabilities are now available in preview:
Alpha Changelog - 9/23/26
Hi everyone, here are the latest round of changes on alpha.midjourney.com . Many of these came directly from your feedback in #alpha-ideas-and-bugs . Please keep it coming! STYLE PREVIEWS We're experimenting with fast models in the interface.
New project activity feed
As part of our ongoing work to simplify the Netlify dashboard, we’ve added an activity feed to the project overview page. It’s available on all plans and adapts to how your project is set up.
Retool CLI
Live on cloud • Team • Business • Enterprise Public beta 4.62 Edge • Team • Business • Enterprise Public beta 4.34.4 Stable • Team • Business • Enterprise Public beta The Retool CLI is now available in public beta.
Buildkite Cache is now in public preview
Buildkite Cache is now available in public preview. It saves and restores files and directories across pipeline jobs and builds. Use it for package manager download caches, compiled dependencies, and other regenerable data to avoid repeating work.
Service principal Genie usage is billed at standard pricing
Genie usage by service principals is now billed at standard Genie pay-as-you-go pricing. Service principals are excluded from the free monthly usage allowance that applies to individual users. See Manage budgets and cost controls for Genie and Monitor and understand your Genie cost .
More from Claude PlatformEvery Claude Platform release →
We're expanding which refusals are billed to include refusals that arrive before any output when
We're expanding which refusals are billed to include refusals that arrive before any output when stop_details.category is "bio", "frontier_llm", or "reasoning_extraction", the categories where we measure low volumes of false positives. Mid-stream refusals were already billed.
We're resuming billing for refusals that arrive before any output when stop_details.category is "bio"
We're resuming billing for refusals that arrive before any output when stop_details.category is "bio", "frontier_llm", or "reasoning_extraction", the categories where we measure low volumes of false positives. Mid-stream refusals were already billed. Refusals billed under this change are charged like any other request, at the rates of the model that ran it.
The Compliance API Activity Feed no longer returns file names, project document names, or artifact titles
The Compliance API Activity Feed no longer returns file names, project document names, or artifact titles. The filename and title fields on file, project document, and artifact activities are now always empty or omitted, including on activities recorded before this change.
Build plugins for Claude
Developers can now submit plugins to the Claude directory via a new portal. The portal includes features to track submissions through review and view usage analytics.
Cache diagnostics is out of beta on the Claude API and no longer requires the cache-diagnosis-2026-04-07 beta
Cache diagnostics is out of beta on the Claude API and no longer requires the cache-diagnosis-2026-04-07 beta header. Include the diagnostics object on a Messages request to opt in; requests that still send the header work as before.
Claude Opus 5.5 launches with a 1M token context window and 128k output
Anthropic released Claude Opus 5.5 for long-running agentic coding and knowledge work, with a default 1M token context, 128k max output and always-on adaptive thinking. It costs $4 / $20 per MTok, below Claude Opus 5, and is on the Claude API, Bedrock, Google Cloud and Microsoft Foundry.
Claude Opus 5.5 breaking changes: thinking can't be disabled, forced tool_choice removed
On Claude Opus 5.5, disabling or manually enabling thinking returns a 400; control depth with the effort parameter instead. tool_choice any and tool also return 400, so use auto with strict tool use, and computer use requires the computer_toolset_20260801 toolset.
Fast mode research preview available for Claude Opus 5.5 on the Claude API
Fast mode, in research preview, can now be used with Claude Opus 5.5 on the Claude API.