Every release, doc update, and news item across the Claude ecosystem. Deduped and sorted by publish date.
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. November 3, 2026 Text generated by Claude Mythos 5, Claude Opus 4.7, and Claude Sonnet 4.6 carries Anthropic’s text watermark on the platforms listed in How C…
Internal/Other Changes Updated bundled Claude CLI to version 2.1.318 --- PyPI: https://pypi.org/project/claude-agent-sdk/0.2.178/
Added a record of your answer when Claude Code asks to turn on the mods it writes in a session Added assume_role on mantle upstreams of the Claude apps gateway, for a role in another AWS account and for per-developer AWS cost attribution Added an effort option to a mod's $.model.…
What's changed Added a record of your answer when Claude Code asks to turn on the mods it writes in a session Added assume_role on mantle upstreams of the Claude apps gateway, for a role in another AWS account and for per-developer AWS cost attribution Added an effort option to a…
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. November 3, 2026 Text generated by Claude Mythos 5, Claude Opus 4.7, and Claude Sonnet 4.6 carries Anthropic’s text watermark on the platforms listed in How C…
New Features on_failure option for HookMatcher: Control what happens when a hook callback fails. Set on_failure="block" to block the action when a callback raises, returns None, or returns a value the CLI rejects. Defaults to "continue" (treat failure as no decision). Requires a…
Added a warning to /schedule when a new cloud scheduled task gets connectors you did not ask for, with how to remove them Added a check that asks before a web or shell tool call sends your account email address to the network Added onFailure: "block" for Agent SDK hook callbacks,…
What's changed Added a warning to /schedule when a new cloud scheduled task gets connectors you did not ask for, with how to remove them Added a check that asks before a web or shell tool call sends your account email address to the network Added onFailure: "block" for Agent SDK…
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. November 2, 2026 Long conversations and agent loops on the Messages API can now send smaller requests and get a lower time to first token with message threads…
Chores internal: type-check the published declarations of every subpackage Documentation examples: use current model IDs
Bug Fixes foundry: make client.d.ts type-check with skipLibCheck off Chores internal: type-check the published declarations of every subpackage
Features api: add GA methods for analytics, spend limits and RBAC api: add named beta types for unified metrics and RBAC delete responses api: add shared analytics order and increase request actor types api: add tool_use_limit_reached_error and compaction_limit_reached_error sess…
Features api: add GA methods for analytics, spend limits and RBAC api: add named beta types for unified metrics and RBAC delete responses api: add shared analytics order and increase request actor types api: add tool_use_limit_reached_error and compaction_limit_reached_error sess…
Features api: add GA methods for analytics, spend limits and RBAC api: add named beta types for unified metrics and RBAC delete responses api: add shared analytics order and increase request actor types api: add tool_use_limit_reached_error and compaction_limit_reached_error sess…
Internal/Other Changes Updated bundled Claude CLI to version 2.1.316 --- PyPI: https://pypi.org/project/claude-agent-sdk/0.2.176/
Added CLAUDE_CODE_DISABLE_ULTRATHINK, which turns the ultrathink keyword off Added pooled group budgets to the Claude apps gateway: one monthly budget that a group's members share, on top of each member's own limit, set with pooled_budget on the spend limits admin API Added CLAUD…
What's changed Added CLAUDE_CODE_DISABLE_ULTRATHINK, which turns the ultrathink keyword off Added pooled group budgets to the Claude apps gateway: one monthly budget that a group's members share, on top of each member's own limit, set with pooled_budget on the spend limits admin…
October 2026 October 21, 2026 Claude Duet research preview for Pro and Max plans We just opened a research preview for users on Pro and Max plans: Claude Duet, a new app where Claude works as a proactive agent. For more information, see our blog post: Introducing Claude Duet. Oct…
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. October 30, 2026 We’ve deprecated fast mode for Claude Opus 4.8, with removal on November 30, 2026. After removal, requests to claude-opus-4-8 with speed: "fa…
Internal/Other Changes Updated bundled Claude CLI to version 2.1.314 CI: raised PyPI project size limit guard from 50 GiB to 150 GiB to match the new quota granted by PyPI (#1455) --- PyPI: https://pypi.org/project/claude-agent-sdk/0.2.175/
Added permissions.blockWritesOutsideWorkingDirectories: Write, Edit and NotebookEdit refuse paths outside the working directories in every permission mode Added an optional groups list to Claude apps gateway upstreams: only developers in the listed IdP groups are sent to that ups…
What's changed Added permissions.blockWritesOutsideWorkingDirectories: Write, Edit and NotebookEdit refuse paths outside the working directories in every permission mode Added an optional groups list to Claude apps gateway upstreams: only developers in the listed IdP groups are s…
/restart — Restart Claude Code and resume this session, which applies an installed update. Run it when the footer offers it after an update installs. Requires a Pro or Max plan and a native install on macOS or Linux, not WSL. Requires Claude Code v2.1.288 or later. Alias: /update
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. October 29, 2026 We’ve launched the Usage and Cost Analytics API in beta with the analytics-usage-cost-2026-08-24 beta header. Its /v1/organizations/analytics…
Impact: minor · Status: monitoring investigating (2026-10-28T16:19:10.239Z): We are investigating elevated errors affecting the Google Calendar connector. Some requests to list or search calendar events have been failing since October 26. We will provide an update as soon as poss…
Impact: minor · Status: investigating investigating (2026-10-28T03:59:32.383Z): We are investigating elevated errors when searching and reading email with the Gmail connector. This issue does not affect other connectors. We will provide an update as soon as possible. investigatin…
Added oidc.user_id_claim to the Claude apps gateway, to identify people by an id_token claim other than sub, such as Microsoft Entra ID's oid Added click to send: in fullscreen, clicking the "to send now" hint under a queued message sends it right away, as its key does Fixed mana…
What's changed Added oidc.user_id_claim to the Claude apps gateway, to identify people by an id_token claim other than sub, such as Microsoft Entra ID's oid Added click to send: in fullscreen, clicking the "to send now" hint under a queued message sends it right away, as its key…
Claude’s web interface (claude.ai) and mobile apps use a system prompt to provide up-to-date information, such as the current date, to Claude at the start of every conversation. The system prompt also encourages certain behaviors, such as always providing code snippets in Markdow…
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. October 23, 2026 The Claude Tag API is available in beta for Claude Enterprise organizations with the experimental-claude-tag-2026-10-21 beta header. Its /v1/…
Features api: add user_profile_id to External Keys and Workspaces Chores ci: remove unused build upload steps docs: clarify what disabling the Compliance API stops docs: update example user ID in Admin API examples tests: fail with a hint when the mock server is not running Docum…
Impact: major · Status: identified identified (2026-10-27T15:09:09.160Z): We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
Impact: major · Status: monitoring investigating (2026-10-27T09:14:35.340Z): We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible. monitoring (2026-10-27T09:38:11.433Z): A fix has been deployed for the issue affectin…
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. October 23, 2026 The Claude Tag API is available in beta for Claude Enterprise organizations with the experimental-claude-tag-2026-10-21 beta header. Its /v1/…
Added --hold-idle-file and --max-hold-min to self-hosted-runner, to keep an idle session while your host reports processes it left running Added a tip for the Explanatory output style, shown when you ask Claude for explanations Fixed long freezes at startup and after reading or e…
What's changed Added --hold-idle-file and --max-hold-min to self-hosted-runner, to keep an idle session while your host reports processes it left running Added a tip for the Explanatory output style, shown when you ask Claude for explanations Fixed long freezes at startup and aft…
Impact: major · Status: monitoring investigating (2026-10-25T08:17:08.504Z): We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible. identified (2026-10-25T08:17:18.954Z): We have identified the cause of elevated errors…
Impact: major · Status: monitoring investigating (2026-10-25T06:14:18.252Z): We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible. identifie…
Impact: major · Status: monitoring investigating (2026-10-24T05:16:50.867Z): We are investigating elevated errors on requests to other Claude models. We will provide an update as soon as possible. identified (2026-10-24T05:24:53.030Z): We have identified the cause of elevated err…
Impact: major · Status: investigating investigating (2026-10-24T00:31:37.908Z): We are investigating elevated errors on requests to Claude Opus 5.5. We will provide an update as soon as possible.
Internal/Other Changes Updated bundled Claude CLI to version 2.1.310 --- PyPI: https://pypi.org/project/claude-agent-sdk/0.2.174/
Added the Monitor tool and plugin monitors on Bedrock, Vertex, and Foundry, and when telemetry or nonessential traffic is disabled; long foreground sleeps are now blocked there too Fixed requests failing behind some gateways and compatible servers that reject the effort-2025-11-2…
What's changed Added the Monitor tool and plugin monitors on Bedrock, Vertex, and Foundry, and when telemetry or nonessential traffic is disabled; long foreground sleeps are now blocked there too Fixed requests failing behind some gateways and compatible servers that reject the e…
Impact: critical · Status: monitoring investigating (2026-10-23T23:37:42.938Z): We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible. identified (2026-10-23T23:39:22.607Z): We have identified the cause of elevated err…
Bug Fixes google-cloud: send user profile routes to the organization endpoint Chores internal: stop expecting the beta query param in tests Documentation google-cloud: update the product name in the package description google-cloud: update the product name
Features api: add Claude Tag endpoints for Claude Enterprise organizations Bug Fixes client: link the long-request error messages to the SDK documentation Chores client: stop sending query params hardcoded in endpoint paths docs: improve the descriptions of the code execution too…
Features api: add Claude Tag endpoints for Claude Enterprise organizations google-cloud: add user profiles and send them to the organization endpoint Bug Fixes auth: don't overwrite a credentials file or spend its refresh token on a client's per-request base URL override Chores c…
Features api: add Claude Tag endpoints for Claude Enterprise organizations Bug Fixes google-cloud: send user profiles requests to the organization endpoint Chores client: stop sending query params hardcoded in endpoint paths docs: improve the descriptions of the code execution to…
Features api: add support for message threads api: add usage and cost reports by dimension, mark older reports legacy Bug Fixes client: stop suggesting math.inf in the max_retries error message tools: leave the tool runner's history to the caller after append_messages(), and keep…
Features api: add support for message threads api: add usage and cost reports by dimension, mark older reports legacy Bug Fixes tools: copy the messages a tool runner is created with again tools: restore what the tool runner does after setMessagesParams() or pushMessages() in the…
Features api: add support for message threads api: add usage and cost reports by dimension, mark older reports legacy Bug Fixes auth: don't share an in-flight token fetch across base URLs tools: send a change made in place to an earlier message of a tool runner with the next requ…
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. October 22, 2026 We've launched Claude Models on Google Cloud (Anthropic managed), the Claude API operated by Anthropic and reached through your Google Cloud…
Internal/Other Changes Updated bundled Claude CLI to version 2.1.309 --- PyPI: https://pypi.org/project/claude-agent-sdk/0.2.173/
The Claude Platform release notes list changes to the Claude API, the client SDKs, and the Claude Console, newest first. October 22, 2026 We've launched Claude Models on Google Cloud (Anthropic managed), the Claude API operated by Anthropic and reached through your Google Cloud…
Fixed sandboxed Bash commands on macOS and Linux running the shell's startup files outside the sandbox before each command Fixed macOS sandbox denyWrite glob patterns not applying at a path's real location when the pattern's folder is reached through a symlink Fixed sandboxed com…
What's changed Fixed sandboxed Bash commands on macOS and Linux running the shell's startup files outside the sandbox before each command Fixed macOS sandbox denyWrite glob patterns not applying at a path's real location when the pattern's folder is reached through a symlink Fixe…