AI People Wiki

Builders & open source

Lars Grammel

Works on the AI SDK; co-author of its release posts since 2024, Vercel

  • Works on the AI SDK; co-author of its release posts since 2024, Vercel14

Lars Grammel works on Vercel's open-source AI SDK, a TypeScript toolkit for building AI applications and agents; Grammel's GitHub profile lists Vercel. Grammel co-wrote the May 2024 AI SDK 3.1 post, which announced that the ModelFusion project was joining the team, and is the first-listed author of the AI SDK 5 release post (July 2025). Grammel's name appears on Vercel's release posts for AI SDK 3.2 through AI SDK 7 (June 2026).12345

At a glance

Current role
Works on the AI SDK; co-author of its release posts since 2024
Company
Vercel
Sector
Company
Work listed
2
Sources cited
7
Profile reviewed

AI SDK

Grammel co-wrote, with Jared Palmer, Vercel's May 2024 post on AI SDK 3.1, which announced that ModelFusion was joining the team and introduced AI SDK Core as a unified API for generating text, structured objects and tool calls. Grammel then appeared on the author lists of the AI SDK 3.2, 3.3, 3.4, 4.0, 4.1 and 4.2 release posts.246

Grammel is first-listed author of the AI SDK 5 post from July 2025 and a co-author of the AI SDK 6 (December 2025) and AI SDK 7 (June 2026) posts. In 2025 Grammel also co-wrote, with Walter Korman, Vercel's announcement of the AI Gateway, and in 2026 co-wrote a post on building a software factory for the AI SDK.3754

Work and contributions

  • AI SDK Open-source code

    First-listed author of the AI SDK 5 release and co-author of Vercel's posts for AI SDK 3.1 through AI SDK 7, which document the SDK's core, UI and agent features.3425

  • ModelFusion Open-source code

    Co-wrote the AI SDK 3.1 announcement with Jared Palmer, which said the ModelFusion project was joining the AI SDK team.2

Timeline

  1. Co-authored the AI SDK 3.1 release, in which ModelFusion joined the AI SDK team.2
  2. Co-authored the AI SDK 4.0 release post.6
  3. Published the AI SDK 5 release post as first-listed author.3
  4. Co-authored the AI SDK 6 release post.7
  5. Co-authored the AI SDK 7 release post.5

Where they work

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References

7 sources · profile reviewed Oct 22, 2026 · data updated Oct 22, 2026

  1. lgrammel (Lars Grammel) on GitHubGitHub · Official page · accessed Oct 22, 2026
  2. Vercel AI SDK 3.1: ModelFusion joins the team — Vercel blogVercel · Announcement · published May 2, 2024 · accessed Oct 22, 2026
  3. AI SDK 5 — Vercel blogVercel · Release notes · published Jul 31, 2025 · accessed Oct 22, 2026
  4. Posts by Lars Grammel — Vercel blogVercel · Official page · accessed Oct 22, 2026
  5. AI SDK 7 — Vercel blogVercel · Release notes · published Jun 25, 2026 · accessed Oct 22, 2026
  6. AI SDK 4.0 — Vercel blogVercel · Release notes · published Nov 18, 2024 · accessed Oct 22, 2026
  7. AI SDK 6 — Vercel blogVercel · Release notes · published Dec 22, 2025 · accessed Oct 22, 2026