Releasesby IbisWe've released new versions of the client SDKs and the ant CLI that send API version 2026-10-21 by default
Update3 days agoUnverifiedAdded Oct 22, 2026
We've released new versions of the client SDKs and the ant CLI that send API version 2026-10-21 by default: Python SDK 2.0.0, TypeScript SDK 1.0.0, C# SDK 13.0.0, Go SDK 2.0.0, Java SDK 3.0.0, PHP SDK 1.0.0, Ruby SDK 2.0.0, and ant CLI 2.0.0. See Switch to 2026-10-21.
Topics: Developer tools
More Claude Platform releases
Every Claude Platform releaseWe've released API version 2026-10-21
We've released API version 2026-10-21. Migrating to API version 2026-10-21 shows how to upgrade.
The new SDK and CLI versions also have breaking changes that don't depend on the API version, and they are
The new SDK and CLI versions also have breaking changes that don't depend on the API version, and they are licensed under Apache 2.0 instead of the MIT License. See SDK and CLI changes.
We've added the enforcement_status and enforcement_actions fields to user profiles, so you can see whether
We've added the enforcement_status and enforcement_actions fields to user profiles, so you can see whether Anthropic has restricted or banned one of your end customers. To find the profiles that have an open restriction or ban, list your profiles with the new enforcement_status[] filter. See Check whether Anthropic has restricted or banned a profile.
We've launched Claude Models on Google Cloud (Anthropic managed), the Claude API operated by Anthropic and
We've launched Claude Models on Google Cloud (Anthropic managed), the Claude API operated by Anthropic and reached through your Google Cloud project. Google Cloud IAM controls access. Google Cloud Marketplace handles billing.
Fast mode is available for Claude Opus 5.5 on Claude Models on Google Cloud (Anthropic managed)
Fast mode is available for Claude Opus 5.5 on Claude Models on Google Cloud (Anthropic managed).
Inference hooks are out of beta for Claude Enterprise organizations
Inference hooks are out of beta for Claude Enterprise organizations.
We've launched user profiles, so you can tell Anthropic which of your end customers each API request is for
We've launched user profiles, so you can tell Anthropic which of your end customers each API request is for. If you operate a platform or gateway, or resell API access, a safety enforcement action can then apply to one end customer instead of your whole organization. The SDK and the ant CLI support the new /v1/user_profiles endpoints.
We've added organization webhooks to the Admin API, in beta with the webhooks-2026-10-07 beta header
We've added organization webhooks to the Admin API, in beta with the webhooks-2026-10-07 beta header. Its /v1/organizations/webhooks endpoints register webhook endpoints for two event types: one for when Anthropic restricts or bans one of your organization's user profiles, and one for when the restriction or ban ends.
Also shipped on Oct 21, 2026
Anthropic in October 20262026.10.09
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