@anthropic-ai/sdk

Anthropic TypeScript SDK by Anthropic

The official TypeScript library for the Anthropic API

Live Registry Versionv1.3.0Previous: v1.2.0Published 2026-10-23

Stability Grade

C+ (70/100)

90-Day Velocity

27 releases

High release cadence

Dependencies

3 direct

NPM manifest

License

Apache-2.0

Verified on NPM

Recommended Exact Pin: npm install @anthropic-ai/sdk@1.3.0

NPM Registry ->GitHub Repo ->

TL;DR Verdict & Quick Citation Summary (2026-10-24)Source: AgentBreakWatch Live NPM Index

Anthropic TypeScript SDK (@anthropic-ai/sdk) is currently at v1.3.0 on NPM (published 2026-10-23), with a 90-day stability score of 70/100 (C+) and HIGH schema drift risk across 27 releases in the past 90 days. Major v1.x transition drops legacy completions helpers and enforces typed beta headers for computer-use, code-execution, and MCP connector blocks. Production teams should pin npm install @anthropic-ai/sdk@1.3.0 rather than using unpinned @latest tags.

Breaking Changes & Tool Schema Drift Analysis

Major v1.x transition drops legacy completions helpers and enforces typed beta headers for computer-use, code-execution, and MCP connector blocks.

Watched Exports / MCP Tool Signatures:

anthropic.messages.createToolUseBlockBetaMcpToolConfig

Before (Deprecated / Unpinned Pattern)

const msg = await anthropic.beta.messages.create({
  model: "claude-3-7-sonnet-20250219",
  betas: ["token-efficient-tools-2025-02-19"],
  messages
});

After (Verified v1.3.0 Pattern)

const msg = await anthropic.messages.create({
  model: "claude-sonnet-4-5",
  thinking: { type: "enabled", budget_tokens: 4096 },
  messages
});

Frequently Asked Questions: @anthropic-ai/sdk

What is the latest version of @anthropic-ai/sdk on NPM?

As of 2026-10-24, the latest stable version of @anthropic-ai/sdk (Anthropic TypeScript SDK by Anthropic) on NPM is v1.3.0, published on 2026-10-23. It has shipped 27 releases in the last 90 days.

Does @anthropic-ai/sdk v1.3.0 have breaking changes or MCP schema drift risk?

@anthropic-ai/sdk currently carries a HIGH schema drift risk rating with a Stability Score of 70/100 (Grade C+). Major v1.x transition drops legacy completions helpers and enforces typed beta headers for computer-use, code-execution, and MCP connector blocks.

How do I safely pin @anthropic-ai/sdk in production?

Avoid unpinned @latest tags in production agent configs. Pin the exact verified version using `npm install @anthropic-ai/sdk@1.3.0` and monitor anthropic.messages.create, ToolUseBlock, BetaMcpToolConfig for parameter or schema changes.

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