# Vercel AI SDK Core (ai) - AgentBreakWatch Reference

> TL;DR Verdict: Vercel AI SDK Core (`ai`) is currently at v7.0.152 on NPM (published 2026-10-23), with a 90-day Stability Score of 70/100 (C+) and HIGH schema drift risk across 244 releases in the last 90 days. AI SDK v7 unifies LanguageModelV3 provider specifications, replaces maxSteps with stopWhen(stepCountIs(n)), and restructures UIMessage stream parts.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/vercel-ai-sdk
- Category Hub: https://agentbreakwatch.vercel.app/c/agent-sdks (AI Agent SDKs & Frameworks Breaking-Change Index)
- Package Name: `ai`
- Registry: NPM (https://www.npmjs.com/package/ai)
- GitHub Repository: https://github.com/vercel/ai
- Vendor: Vercel
- Latest Live Version: v7.0.152
- Published Date: 2026-10-23T19:41:13.004Z
- 90-Day Release Count: 244
- Direct Dependencies: 3
- License: Apache-2.0
- Stability Score: 70/100 (Grade C+)
- Schema Drift Risk: HIGH
- Recommended Exact Pin Command: `npm install ai@7.0.152`
- Watched Symbols / MCP Tools: generateText, streamText, tool, stopWhen, UIMessage
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
AI SDK v7 unifies LanguageModelV3 provider specifications, replaces maxSteps with stopWhen(stepCountIs(n)), and restructures UIMessage stream parts.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
const result = await generateText({
  model: openai("gpt-4o"),
  maxSteps: 5,
  tools: { weather: tool({ parameters: z.object({ city: z.string() }), execute }) }
});
```

## Migration Diff: After (Verified v7.0.152 Pattern)
```
const result = await generateText({
  model: openai("gpt-5"),
  stopWhen: stepCountIs(5),
  tools: { weather: tool({ inputSchema: z.object({ city: z.string() }), execute }) }
});
```

## Recent Verified Releases
- v6.0.315 (published 2026-10-23) [LATEST]
- v7.0.152 (published 2026-10-23)
- v5.0.281 (published 2026-10-23)
- v7.0.151 (published 2026-10-23)
- v7.0.150 (published 2026-10-22)
- v6.0.314 (published 2026-10-22)