# Jay Gambetta

> Jay Gambetta is director of IBM Research. Granite 4.2 3B, Granite Guardian and Granite Switch 4.1 on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/jay-gambetta/
- Markdown: https://www.anchorterminal.com/people/jay-gambetta/index.md (~1,350 tokens)
- Slim: https://www.anchorterminal.com/people/jay-gambetta/index.min.md (~1,030 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/jay-gambetta/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Director of IBM Research.

Jay Gambetta is IBM's Director of Research and an IBM Fellow, leading the lab whose work spans AI, semiconductors and quantum computing. He earlier ran IBM Quantum as vice president and led the development of Qiskit, the open-source quantum software kit. A physicist, he holds a PhD from Griffith University in Australia.

## What Jay builds

- [Granite 4.2 3B](https://www.anchorterminal.com/tools/granite-4-2-3b.md), graded C, 59.8/100, in Open-weight models. Granite 4.2 3B is IBM's open-weight dense reasoning model of 3.7B parameters, post-trained from Granite 4.1 3B Base, with switchable thinking, tool calling and a 131,072-token context, published in BF16, FP8, FP4, GGUF and MLX under Apache 2.0. Director of IBM Research, researched 2026-10-28.
- [Granite Guardian](https://www.anchorterminal.com/tools/granite-guardian.md), graded C, 60.1/100, in Guardrails & safety filters. Granite Guardian is IBM's family of open-weight judge models. The current 8-billion-parameter release answers yes or no on whether a prompt, response, retrieved context or function call meets a built-in or custom criterion, and the owner runs it. Director of IBM Research, researched 2026-10-28.
- [Granite Switch 4.1](https://www.anchorterminal.com/tools/granite-switch.md), graded C, 59.5/100, in Decision models. Granite Switch 4.1 is IBM's open-weight 8B and 30B Granite 4.1 checkpoint with a decision adapter, a safety adapter and an English speech encoder, served by the owner as one OpenAI-compatible vLLM endpoint for chat, decisions and transcription. Director of IBM Research, researched 2026-10-28.

## Works with

- [Arvind Krishna](https://www.anchorterminal.com/people/arvind-krishna/), Chairman, President and Chief Executive Officer
- [Charles Ranlett Flint](https://www.anchorterminal.com/people/charles-ranlett-flint/), Co-founder, IBM (as Computing-Tabulating-Recording Company)
- [George Winthrop Fairchild](https://www.anchorterminal.com/people/george-winthrop-fairchild/), Co-founder, IBM (as Computing-Tabulating-Recording Company)
- [Herman Hollerith](https://www.anchorterminal.com/people/herman-hollerith/), Co-founder, IBM (as Computing-Tabulating-Recording Company)
- [Inkit Padhi](https://www.anchorterminal.com/people/inkit-padhi/), First author, Granite Guardian paper (IBM Research)
- [Parul Awasthy](https://www.anchorterminal.com/people/parul-awasthy/), First author, Granite Embedding R2 Models

## Questions

### Who is Jay Gambetta?

Jay Gambetta is IBM's Director of Research and an IBM Fellow, leading the lab whose work spans AI, semiconductors and quantum computing. He earlier ran IBM Quantum as vice president and led the development of Qiskit, the open-source quantum software kit. A physicist, he holds a PhD from Griffith University in Australia.

### What does IBM make?

Anchor Terminal lists Granite 4.2 3B, Granite Guardian and Granite Switch 4.1 from IBM. Granite 4.2 3B is IBM's open-weight dense reasoning model of 3.7B parameters, post-trained from Granite 4.1 3B Base, with switchable thinking, tool calling and a 131,072-token context, published in BF16, FP8, FP4, GGUF and MLX under Apache 2.0.

### How are Jay's tools graded?

Granite 4.2 3B is graded C, 59.8 out of 100; Granite Guardian is graded C, 60.1 out of 100; Granite Switch 4.1 is graded C, 59.5 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://huggingface.co/ibm-granite/granite-4.2-3b
- https://huggingface.co/ibm-granite/granite-4.2-3b/discussions
- https://en.wikipedia.org/wiki/IBM
- https://en.wikipedia.org/wiki/Charles_Ranlett_Flint
- https://en.wikipedia.org/wiki/Herman_Hollerith
- https://en.wikipedia.org/wiki/George_W._Fairchild
- https://www.ibm.com/granite
- https://www.ibm.com/us-en
- https://www.ibm.com/granite/docs/models/guardian
- https://raw.githubusercontent.com/ibm-granite/granite-guardian/main/README.md
- https://huggingface.co/ibm-granite/granite-guardian-4.1-8b/discussions
- https://huggingface.co/ibm-granite/granite-switch-4.1-8b
- https://raw.githubusercontent.com/generative-computing/granite-switch/main/README.md

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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