Model family

MedGemma

Family overview — summarizes releases; licenses and availability belong to each release.

Maintained by Google (Health AI Developer Foundations)1 2

MedGemma is a collection of Gemma 3 variants trained by Google on medical text and images, published as part of Health AI Developer Foundations (HAI-DEF). MedGemma 1 was released in May 2025 (4B multimodal and 27B text-only) with a 27B multimodal variant in July 2025, and MedGemma 1.5 4B followed in January 2026.1 2 4

Documentation: MedGemma 1.5 model card (Health AI Developer Foundations) (external site: developers.google.com)
Documentation: MedGemma 1 model card (external site: developers.google.com)
Repository: google-health/medgemma repository (external site: github.com)
License: Health AI Developer Foundations terms of use (external site: developers.google.com)

Last reviewedSep 29, 2026Entry updated Sep 29, 2026Documented release May 20, 2025

Releases assessed

Each release is assessed on its own. This family has no family-wide openness label.

Releases in the MedGemma family
Release	Weights	Tier (USASI rubric v0.1)	License	Released
MedGemma 1.5 4B	Weights: Public	Model-disclosure tier (USASI rubric v0.1): Open-weight	Health AI Developer Foundations Terms of Use, Apache-2.0	Jan 13, 2026
MedGemma 27B (multimodal)	Weights: Public	Model-disclosure tier (USASI rubric v0.1): Open-weight	Health AI Developer Foundations Terms of Use, Apache-2.0	Jul 9, 2025

What it is useful for

Google describes MedGemma as a starting point for developers building healthcare AI applications that involve text generation, and states that developers are expected to validate and adapt it for their use case; it is not intended to directly inform clinical decisions.1 5

Organization context

Google (Alphabet)

Provenance and derivatives

MedGemma models are built on Gemma 3 and use a SigLIP image encoder pre-trained on de-identified medical data for the multimodal variants.1 2

Derived from: Gemma 3 — Base architecture and weights; see the Gemma family record.

U.S. eligibility

Project eligibility rests on documented governing or maintaining entities, not on contributors.

Eligible · basis: Documented U.S. control

The MedGemma model cards list Google as author, and the governing terms are issued by Google LLC. Alphabet Inc.'s fiscal 2025 Form 10-K lists its principal executive offices in Mountain View, California, and Exhibit 21.01 lists Google LLC as a Delaware subsidiary of Alphabet.1 3 6 7

Assessed Sep 29, 2026

Sources

1.
MedGemma 1.5 model card (external site: developers.google.com)
Google for Developers (Health AI Developer Foundations) · Model card · accessed Sep 29, 2026
2.
MedGemma 1 model card (external site: developers.google.com)
Google for Developers (Health AI Developer Foundations) · Model card · accessed Sep 29, 2026
3.
Health AI Developer Foundations Terms of Use (external site: developers.google.com)
Google LLC · License · accessed Sep 29, 2026
4.
Gemma releases (external site: ai.google.dev)
Google AI for Developers · Release notes · accessed Sep 29, 2026
5.
Next generation medical image interpretation with MedGemma 1.5 and medical speech to text with MedASR (external site: research.google)
Google Research · Announcement · published Jan 13, 2026 · accessed Sep 29, 2026
6.
Alphabet Inc. Form 10-K for the fiscal year ended December 31, 2025 (external site: sec.gov)
Alphabet Inc. (via U.S. Securities and Exchange Commission EDGAR) · Filing · accessed Sep 29, 2026
7.
Alphabet Inc. Form 10-K fiscal 2025, Exhibit 21.01 (subsidiaries) (external site: sec.gov)
Alphabet Inc. (via U.S. Securities and Exchange Commission EDGAR) · Filing · accessed Sep 29, 2026

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