# Anthropic TypeScript SDK (@anthropic-ai/sdk) - AgentBreakWatch Reference

> TL;DR Verdict: 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 last 90 days. Major v1.x transition drops legacy completions helpers and enforces typed beta headers for computer-use, code-execution, and MCP connector blocks.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/anthropic-sdk-ts
- Category Hub: https://agentbreakwatch.vercel.app/c/agent-sdks (AI Agent SDKs & Frameworks Breaking-Change Index)
- Package Name: `@anthropic-ai/sdk`
- Registry: NPM (https://www.npmjs.com/package/@anthropic-ai/sdk)
- GitHub Repository: https://github.com/anthropics/anthropic-sdk-typescript
- Vendor: Anthropic
- Latest Live Version: v1.3.0
- Published Date: 2026-10-23T23:31:47.897Z
- 90-Day Release Count: 27
- Direct Dependencies: 3
- License: Apache-2.0
- Stability Score: 70/100 (Grade C+)
- Schema Drift Risk: HIGH
- Recommended Exact Pin Command: `npm install @anthropic-ai/sdk@1.3.0`
- Watched Symbols / MCP Tools: anthropic.messages.create, ToolUseBlock, BetaMcpToolConfig
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
Major v1.x transition drops legacy completions helpers and enforces typed beta headers for computer-use, code-execution, and MCP connector blocks.

## Migration Diff: 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
});
```

## Migration Diff: After (Verified v1.3.0 Pattern)
```
const msg = await anthropic.messages.create({
  model: "claude-sonnet-4-5",
  thinking: { type: "enabled", budget_tokens: 4096 },
  messages
});
```

## Recent Verified Releases
- v1.3.0 (published 2026-10-23) [LATEST]
- v1.2.0 (published 2026-10-23)
- v1.1.0 (published 2026-10-21)
- v1.0.0 (published 2026-10-21)
- v0.137.0 (published 2026-10-20)
- v0.136.0 (published 2026-10-20)