# Vercel AI SDK Anthropic Provider (@ai-sdk/anthropic) - AgentBreakWatch Reference

> TL;DR Verdict: Vercel AI SDK Anthropic Provider (`@ai-sdk/anthropic`) is currently at v4.0.87 on NPM (published 2026-10-22), with a 90-day Stability Score of 78/100 (B) and MEDIUM schema drift risk across 116 releases in the last 90 days. v4 provider requires AI SDK 7+ and moves thinking budget configuration under providerOptions.anthropic.thinking.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/ai-sdk-anthropic
- Category Hub: https://agentbreakwatch.vercel.app/c/agent-sdks (AI Agent SDKs & Frameworks Breaking-Change Index)
- Package Name: `@ai-sdk/anthropic`
- Registry: NPM (https://www.npmjs.com/package/@ai-sdk/anthropic)
- GitHub Repository: https://github.com/vercel/ai
- Vendor: Vercel
- Latest Live Version: v4.0.87
- Published Date: 2026-10-22T21:22:25.832Z
- 90-Day Release Count: 116
- Direct Dependencies: 2
- License: Apache-2.0
- Stability Score: 78/100 (Grade B)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npm install @ai-sdk/anthropic@4.0.87`
- Watched Symbols / MCP Tools: anthropic, providerOptions.anthropic.thinking
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
v4 provider requires AI SDK 7+ and moves thinking budget configuration under providerOptions.anthropic.thinking.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
const model = anthropic("claude-3-7-sonnet-20250219", { sendReasoning: true });
```

## Migration Diff: After (Verified v4.0.87 Pattern)
```
const result = await generateText({
  model: anthropic("claude-sonnet-4-5"),
  providerOptions: { anthropic: { thinking: { type: "enabled", budgetTokens: 4000 } } }
});
```

## Recent Verified Releases
- v4.0.87 (published 2026-10-22) [LATEST]
- v4.0.86 (published 2026-10-22)
- v2.0.110 (published 2026-10-21)
- v4.0.85 (published 2026-10-21)
- v3.0.135 (published 2026-10-21)
- v4.0.84 (published 2026-10-20)