Anthropic Release Notes

Admin controls for desktop extensions

Allows Team and Enterprise plans to enable/disable public desktop extensions and upload custom extensions. See Admin Controls for Desktop Extensions.

Making shared artifacts embeddable

Claude users with free, Pro, or Max plans can generate an embed code for any published artifacts.

• Request IDs are now included directly in error response bodies alongside the existing request-id header. Learn more in Errors.

• We've released the Usage & Cost API, allowing administrators to programmatically monitor their organization's usage and cost data.
• We've added a new endpoint to the Admin API for retrieving organization information. For details, see the Organization Info Admin API reference.

Ability to change monthly Team plan billing to annual

Allowing Team plan organizations with monthly billing to upgrade to annual billing. See How to change your Team plan from monthly to annual billing.

• We've launched beta support for a 1M token context window in Claude Sonnet 4 on the Claude API and Amazon Bedrock.

1M token context window

The 1M token context window for Claude Sonnet 4 is currently in beta for API organizations in usage tier 4, or with custom rate limits. See 1M token context window in our docs for more information.

• Some customers might encounter 429 (rate_limit_error) errors following a sharp increase in API usage due to acceleration limits on the API. Previously, 529 (overloaded_error) errors would occur in similar scenarios.

Ability to search past conversations

Users on Max, Team, Enterprise plans can prompt Claude to search over past chats, allowing finer-grained context continuation and synthesizing across topics. See Searching past chats.

• Search result content blocks are out of beta on the Claude API and Vertex AI. This feature enables natural citations for RAG applications with proper source attribution. The beta header search-results-2025-06-09 is no longer required. Learn more in Search results.

Claude Code Security Reviews

Two new cybersecurity features were added to Claude Code:

• /security-review command

• GitHub Actions

See Automated Security Reviews in Claude Code.

• We've launched Claude Opus 4.1, an incremental update to Claude Opus 4 with enhanced capabilities and performance improvements.* Learn more in Models overview.

*Opus 4.1 does not allow both temperature and top_p parameters to be specified. Please use only one.

Claude Opus 4.1

Claude Opus 4.1 (an incremental update to Opus 4) brings enhanced performance as our most capable model for complex reasoning, analysis, and creative tasks.

• Read our announcement here: Claude Opus 4.1.

• Refer to Models overview for more specific information about Opus 4.1.

Project Sharing

Enabled project permissions and sharing for Team and Enterprise plans. See Organization-wide sharing for more information.

Note: Refer to our docs for historical release notes.

• We've released text_editor_20250728, an updated text editor tool that fixes some issues from the previous versions and adds an optional max_characters parameter that allows you to control the truncation length when viewing large files.

• We've increased rate limits for Claude Opus 4 on the Claude API to give you more capacity to build and scale with Claude. For customers with usage tier 1-4 rate limits, these changes apply immediately to your account - no action needed.

• We've retired the Claude 2.0, Claude 2.1, and Claude Sonnet 3 models. All requests to these models will now return an error. Read more in Model deprecations.

• We've increased rate limits for Claude Sonnet 4 on the Claude API to give you more capacity to build and scale with Claude. For customers with usage tier 1-4 rate limits, these changes apply immediately to your account - no action needed.

• We've launched search result content blocks in beta, enabling natural citations for RAG applications. Tools can now return search results with proper source attribution, and Claude will automatically cite these sources in its responses - matching the citation quality of web search. This eliminates the need for document workarounds in custom knowledge base applications. Learn more in Search results. To enable this feature, use the beta header search-results-2025-06-09.