Claude Developer Platform Release Notes

Last updated: Nov 15, 2025

  • Nov 14, 2025
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      Nov 14, 2025
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      Nov 15, 2025

    Claude Developer Platform by Anthropic

    November 14, 2025

    • We've launched structured outputs in public beta, providing guaranteed schema conformance for Claude's responses. Use JSON outputs for structured data responses or strict tool use for validated tool inputs. Available for Claude Sonnet 4.5 and Claude Opus 4.1. To enable, use the beta header structured-outputs-2025-11-13.
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  • Oct 28, 2025
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      Oct 28, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    October 28, 2025

    • We announced the deprecation of the Claude Sonnet 3.7 model. Read more in our documentation.

    • We've retired the Claude Sonnet 3.5 models. All requests to these models will now return an error.

    • We've expanded context editing with thinking block clearing (clear_thinking_20251015), enabling automatic management of thinking blocks. Learn more in our context editing documentation.

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  • Oct 16, 2025
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      Oct 16, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    October 16, 2025

    Anthropic unveils Agent Skills beta to extend Claude with dynamic skills. Pre-built powers for PowerPoint, Excel, Word, and PDFs plus a Custom Skills path via the Skills API. Code execution tool must be enabled to use skills.

    • We've launched Agent Skills (skills-2025-10-02 beta), a new way to extend Claude's capabilities. Skills are organized folders of instructions, scripts, and resources that Claude loads dynamically to perform specialized tasks. The initial release includes:
      • Anthropic-managed Skills: Pre-built Skills for working with PowerPoint (.pptx), Excel (.xlsx), Word (.docx), and PDF files
      • Custom Skills: Upload your own Skills via the Skills API (/v1/skills endpoints) to package domain expertise and organizational workflows
      • Skills require the code execution tool to be enabled
      • Learn more in our Agent Skills documentation and API reference
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  • Oct 15, 2025
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      Oct 15, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    October 15, 2025

    • We've launched Claude Haiku 4.5, our fastest and most intelligent Haiku model with near-frontier performance. Ideal for real-time applications, high-volume processing, and cost-sensitive deployments requiring strong reasoning. Learn more in our Models & Pricing documentation.
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  • Sep 29, 2025
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      Sep 29, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    September 29, 2025

    Anthropic launches Claude Sonnet 4.5, the memory tool in beta, and context editing in beta, plus global endpoint pricing for AWS Bedrock and Vertex AI. A new stop reason helps handle tokens, aimed at smoother, more scalable conversations.

    • We've launched Claude Sonnet 4.5, our best model for complex agents and coding, with the highest intelligence across most tasks. Learn more in What's new in Claude 4.5.

    • We've introduced global endpoint pricing for AWS Bedrock and Google Vertex AI. The Claude API (1P) pricing is unaffected.

    • We've introduced a new stop reason model_context_window_exceeded that allows you to request the maximum possible tokens without calculating input size. Learn more in our handling stop reasons documentation.

    • We've launched the memory tool in beta, enabling Claude to store and consult information across conversations. Learn more in our memory tool documentation.

    • We've launched context editing in beta, providing strategies to automatically manage conversation context. The initial release supports clearing older tool results and calls when approaching token limits. Learn more in our context editing documentation.

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  • Sep 17, 2025
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      Sep 17, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    September 17, 2025

    We've launched tool helpers in beta for the Python and TypeScript SDKs, simplifying tool creation and execution with type-safe input validation and a tool runner for automated tool handling in conversations. For details, see the documentation for the Python SDK and the TypeScript SDK.

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  • Sep 16, 2025
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      Sep 16, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    September 16, 2025

    Claude rebrands developer offerings with new names and URLs while keeping interfaces unchanged. Console and Docs shift to claude domains with redirects through Dec 16, 2025; support moves to Claude Help Center. API endpoints, headers, and SDKs remain the same, so integrations keep working.

    Claude Brand Unification

    We've unified our developer offerings under the Claude brand. You should see updated naming and URLs across our platform and documentation, but our developer interfaces will remain the same. Here are some notable changes:

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  • Sep 10, 2025
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      Sep 10, 2025
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      Oct 29, 2025
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      Nov 8, 2025

    Claude Developer Platform by Anthropic

    September 10, 2025

    • We've launched the web fetch tool in beta, allowing Claude to retrieve full content from specified web pages and PDF documents. Learn more in our web fetch tool documentation.

    • We've launched the Claude Code Analytics API, enabling organizations to programmatically access daily aggregated usage metrics for Claude Code, including productivity metrics, tool usage statistics, and cost data.

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  • Sep 8, 2025
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      Sep 8, 2025
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      Oct 29, 2025
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      Nov 12, 2025

    Claude Developer Platform by Anthropic

    September 8, 2025

    • We launched a beta version of the C# SDK.
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  • Sep 5, 2025
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      Sep 5, 2025
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      Oct 29, 2025

    Claude Developer Platform by Anthropic

    September 5, 2025

    • We've launched rate limit charts in the Console Usage page, allowing you to monitor your API rate limit usage and caching rates over time.
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