# Google's MedGemma brings open vision AI to medicine

> The new 4-billion-parameter vision-language model is specialized for tasks in radiology, pathology, and complex clinical reasoning.

Published by The Open Weights on Jan 7, 2026. Canonical: https://theopenweights.com/news/medgemma-1-5-4b-addh

## Key facts

- Company: Google DeepMind
- Model: MedGemma 1.5 4B IT
- Version: 1.5
- Category: Vision-Language
- Modalities: Vision-Language, Reasoning
- License: Gemma (Open weights, commercial use allowed)
- Parameters: 4B
- Context window: 131K tokens
- Architecture: Gemma3ForConditionalGeneration
- Precision: BF16
- Weights size: 8.6 GB
- Significance: notable
- Published: 2026-01-07
- Last verified: 2026-06-17
- Hugging Face: https://huggingface.co/google/medgemma-1.5-4b-it
- Canonical URL: https://theopenweights.com/news/medgemma-1-5-4b-addh

Google DeepMind has released MedGemma 1.5, a new open-weights model designed specifically for the medical domain. This 4-billion-parameter model extends the capabilities of the Gemma family into specialized areas, focusing on vision-language tasks that are critical for healthcare.

As a vision-language model (VLM), MedGemma is trained to understand and reason about both text and images. According to its [official model card](https://huggingface.co/google/medgemma-1.5-4b-it), its instruction tuning targets complex use cases like interpreting radiological scans, analyzing pathology slides, and aiding in multifaceted clinical reasoning.

The release marks a significant step for open-source AI in healthcare. By providing researchers and developers with a capable, specialized foundation model, MedGemma could accelerate the development of new diagnostic aids, medical education tools, and clinical support systems that were previously reliant on proprietary, closed-source models.

MedGemma 1.5 is available under the Gemma license, which permits commercial use and distribution subject to its terms. This particular version, `medgemma-1.5-4b-it`, is an instruction-tuned variant, making it ready for conversational and question-answering applications out of the box.

## Get the model

- [Hugging Face](https://huggingface.co/google/medgemma-1.5-4b-it)

## Sources

- [google/medgemma-1.5-4b-it](https://huggingface.co/google/medgemma-1.5-4b-it) — Hugging Face, Jan 7, 2026

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Source: The Open Weights (https://theopenweights.com/). Aggregated and written by Claude, curated by humans. Cite as: "Google's MedGemma brings open vision AI to medicine", The Open Weights, Jan 7, 2026, https://theopenweights.com/news/medgemma-1-5-4b-addh