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Open-weight model · Image and text to text

medgemma-4b-it

by Google google/medgemma-4b-it

Model on Google Cloud Model Garden: MedGemma GitHub repository (supporting code, Colab notebooks, discussions, and Foundations terms of use](https://developers.google.com/health-ai-developer-foundations/terms).

Parameters4.3B
Context
Weights8.6 GB
Licenseother
AccessAccess requested at publisher
Monthly Downloads1.1M

Runs On

What it takes to serve medgemma-4b-it (4.3B parameters): the memory its weights need at each precision, and the cheapest way to rent enough data-center GPUs to hold them.

PrecisionWeightsMemory neededCheapest setupPer hourAlso fits
16-bit 8.6 GB 10.3 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
8-bit 4.3 GB 5.2 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00
4-bit 2.2 GB 2.6 GB 1x MI300X (192 GB)
Vultr
$1.85 1x H100 $1.99 · 1x MI325X $2.00

Memory is the weights at that precision plus 20% for the runtime and a short context; a long context needs more. Prices are the lowest on-demand hourly rates in the SAVRN Index, read Sep 18, 2026.

SAVRN's Notes on medgemma-4b-it

Medical image and text comprehension is what Google trained this for, and the 4B instruction-tuned build is the smallest of three MedGemma variants; the other two are 27B. At 16-bit the weights are 8.6 GB and the run needs 10.3 GB, a sliver of the 192 GB on one MI300X at $1.85 an hour on-demand. At 8-bit the need drops to 5.2 GB, at 4-bit to 2.6 GB. Fit is not the constraint; sessions per card is.

The license reads "other" and access is gated, so a deployment begins with Google's Health AI Developer Foundations terms rather than a standard open license, and those terms come before the files do. Confirm you are taking the build derived from medgemma-4b-pt, and check its context length against your prompts, since our record carries no figure. No host prices are on the Index yet, so your own facility is the priced path.

Model Card

Model on Google Cloud Model Garden: MedGemma GitHub repository (supporting code, Colab notebooks, discussions, and Foundations terms of use](https://developers.google.com/health-ai-developer-foundations/terms). This section describes the MedGemma model and how to use it. MedGemma is a collection of Gemma 3 variants that are trained for performance on medical text and image comprehension. Developers can use MedGemma to accelerate building healthcare-based AI applications. MedGemma currently comes in three variants: a 4B multimodal version and 27B text-only and multimodal versions. Both MedGemma multimodal versions utilize a SigLIP image encoder that has been specifically pre-trained on a…

Excerpt from the card by Google, licensed other.

Identity and Version

Repository
google/medgemma-4b-it
Publisher
Google
Task
Image and text to text
Modality
Image and text
Library
transformers
Parameters
4.3B parameters
Languages
Not stated by the source
Revision
290cda5eeccbee130f987c4ad74a59ae6f196408
First published
2025-05-19
Last updated
2025-10-28

Files and Weights

15 files, 8.6 GB in total. The weights are 2 files totalling 8.6 GB in safetensors.

Weights2 files · 8.6 GB
Configuration7 files · 94.5 KB
Tokenizer3 files · 39.2 MB
Documentation1 file · 35.1 KB
Other1 file · 1.5 KB
Repository1 file · 4.6 KB
Every file
FileTypeSizeSHA-256
model-00001-of-00002.safetensorsWeights5.0 GB
model-00002-of-00002.safetensorsWeights3.6 GB
added_tokens.jsonConfiguration35 B
config.jsonConfiguration2.5 KB
generation_config.jsonConfiguration156 B
model.safetensors.index.jsonConfiguration90.6 KB
preprocessor_config.jsonConfiguration570 B
processor_config.jsonConfiguration70 B
special_tokens_map.jsonConfiguration662 B
README.mdDocumentation35.1 KB
chat_template.jinjaOther1.5 KB
.gitattributesRepository4.6 KB
tokenizer.jsonTokenizer33.4 MB
tokenizer.modelTokenizer4.7 MB
tokenizer_config.jsonTokenizer1.2 MB

License and Download

License
other
Access
Access requested at publisher
Download size
8.6 GB
Download from Google

Released by Google through Google Health AI Developer Foundations. Read the license.

Built From

  • Derived from google/medgemma-4b-pt
  • Described by arXiv:2009.13081
  • Described by arXiv:2102.09542
  • Described by arXiv:2106.14463
  • Described by arXiv:2303.15343
  • Described by arXiv:2404.05590
  • Described by arXiv:2405.03162
  • Described by arXiv:2411.15640
  • Described by arXiv:2412.03555
  • Described by arXiv:2501.18362
  • Described by arXiv:2501.19393
  • Described by arXiv:2507.05201

Memory Requirements

PrecisionWeights in memory
As published8.6 GB
16-bit8.6 GB
8-bit4.3 GB
4-bit2.2 GB

Weights only, from the published parameter count; the key-value cache and runtime add to this.

Compare medgemma-4b-it

Questions About medgemma-4b-it

How much GPU memory does medgemma-4b-it need?

About 10.3 GB at 16-bit and 2.6 GB at 4-bit: the weights (4.3B parameters) plus a working margin. A long context needs more.

What is the cheapest GPU to run medgemma-4b-it on?

At 16-bit, 1x MI300X from $1.85 an hour; at 4-bit, 1x MI300X from $1.85 an hour, at the lowest on-demand prices the SAVRN Index lists.

What license is medgemma-4b-it released under?

other, as its publisher declares it. Read the license text before commercial use.

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