Access Netra-Med-V3-7B

This model is released for NON-COMMERCIAL RESEARCH USE ONLY. It was fine-tuned on data that includes MIMIC-CXR (PhysioNet credentialed data) and PathCap (CC-BY-NC-2.0). You must confirm the statements below before downloading.

By requesting access you confirm that: (1) you will use these weights for non-commercial research only; (2) you will NOT use them to inform clinical decisions or patient care; (3) if your use touches MIMIC-CXR-derived behaviour you hold, or will obtain, the relevant PhysioNet credentialing and accept the corresponding Data Use Agreement; (4) you will not attempt to re-identify any individual from model outputs.

Log in or Sign Up to review the conditions and access this model content.

Netra-Med-V3-7B

A medical vision–language model fine-tuned from ZJU-AI4H/Hulu-Med-7B on a curated 50,000-row multimodal medical corpus spanning 8 imaging modalities and 32 source datasets.

These are merged full weights. You do not need the base model, PEFT, or an adapter — a single from_pretrained is enough.

Not a medical device. This model must not be used for diagnosis, triage, or any decision affecting patient care. It makes confident errors.

Results

Evaluated with a single fixed harness (greedy decoding, identical prompts) against the stock base model. Every number below was produced by the same harness, so the two columns are directly comparable to each other — but not to numbers published elsewhere, which use different prompts, decoding and scoring.

Benchmark Hulu-Med-7B (base) Netra-Med-V3-7B Δ
OmniMedVQA 59.80 81.60 +21.80
SLAKE 68.17 86.20 +18.03
MMMU-Med 37.33 50.67 +13.34
PMC-VQA 49.80 57.40 +7.60
PathVQA 79.60 83.22 +3.62
VQA-RAD 76.49 76.10 −0.39
MedXpertQA 28.80 27.45 −1.35
Mean 57.14 66.09 +8.95

The larger gain is on open-ended answering, which the headline metric understates:

Open-ended recall base Netra-Med-V3-7B Δ
SLAKE 22.07 77.92 +55.85
VQA-RAD 32.11 50.35 +18.24
PathVQA 16.78 34.19 +17.41

Two benchmarks regressed slightly (VQA-RAD −0.39, MedXpertQA −1.35). Both are within or near the measurement error and are reported rather than hidden.

Comparison with frontier and specialist models

Read the caveat before the table. The Netra-Med-V3-7B row was measured by our harness. The other rows are numbers those authors published using their harness. Prompt wording, answer matching and decoding all differ between harnesses, and that difference is not small.

Concrete evidence of exactly that: on MedXpertQA-MM, MedVLThinker reports GPT-4o at 35.95, while the benchmark's own official leaderboard reports GPT-4o at 42.80. Same model, same benchmark, ~7 points apart purely from protocol. So treat the table as indicative positioning, not a controlled head-to-head.

Reference numbers below are from MedVLThinker (arXiv:2508.02669), Table 2, which used greedy decoding averaged over 3 runs — the same decoding strategy this model was scored with.

Model Params PMC-VQA MMMU-Med MedXpert-MM PathVQA SLAKE VQA-RAD Mean
GPT-4o — 58.55 68.82 35.95 72.43 76.44 70.22 63.74
Netra-Med-V3-7B 8B 57.40 50.67 27.45 83.22 86.20 76.10 63.51
GPT-4o-mini — 51.90 63.53 28.55 63.33 75.24 66.91 58.24
MedVLThinker-7B (RL) 7B 50.67 56.86 24.43 66.83 65.79 64.71 54.88
HuatuoGPT-Vision-7B 7B 53.39 50.59 22.00 63.53 75.00 63.60 54.69
Qwen2.5-VL-7B-Instruct 7B 49.30 52.94 18.89 65.39 65.71 68.75 53.50
Hulu-Med-7B (our base) 8B 49.80 37.33 28.80 79.60 68.17 76.49 56.70

Where this model stands, stated plainly:

  • Ahead of GPT-4o on PathVQA (+10.8), SLAKE (+9.8) and VQA-RAD (+5.9) — the image-grounded perception benchmarks.
  • Behind GPT-4o on MMMU-Med (−18.2) and MedXpertQA (−8.5) — the benchmarks that require multi-step expert reasoning rather than reading the image. This is the honest weakness: an 8B model fine-tuned for perception does not acquire expert clinical reasoning.
  • Mean 63.51 vs GPT-4o's 63.74 — level on average, but the averages are made of very different strengths, and averaging across benchmarks of unequal difficulty flatters whichever model happens to win the easy ones.
  • Ahead of every listed open 7B model, including the specialist medical ones, by ~9 points mean.

On MedXpertQA specifically, the official leaderboard places o1 at 56.28, GPT-4o at 42.80, Gemini-2.0-Flash at 37.20, Claude-3.5-Sonnet at 33.20 and GPT-4o-mini at 28.05. Our 27.45 sits at the bottom of that range. Expert-level medical reasoning is not what this model is good at, and no amount of averaging should obscure that.

Usage

import torch
from transformers import AutoModelForCausalLM, AutoProcessor
from PIL import Image

model_id = "dipankar500/Netra-Med-V3-7B"
processor = AutoProcessor.from_pretrained(model_id, trust_remote_code=True)
model = AutoModelForCausalLM.from_pretrained(
    model_id, trust_remote_code=True, dtype=torch.bfloat16, device_map="cuda")
model.eval()

image = Image.open("chest_xray.png")
conversation = [{"role": "user", "content": [
    {"type": "image", "image": image},
    {"type": "text",  "text": "Describe this image in detail and report all findings, "
                              "including any that are normal."},
]}]
inputs = processor.apply_chat_template(
    conversation, add_generation_prompt=True, tokenize=True,
    return_dict=True, return_tensors="pt").to("cuda")
out = model.generate(**inputs, max_new_tokens=512, do_sample=False)
print(processor.batch_decode(out[:, inputs["input_ids"].shape[1]:],
                             skip_special_tokens=True)[0])

trust_remote_code=True is required: Hulu-Med defines a custom architecture. The necessary modeling files are included in this repository, so nothing else needs to be fetched.

Prompting notes

  • Open-ended: ask for a report, not a label — "Describe this image in detail and report all findings, including any that are normal." The model was trained to produce structured Findings/Impression prose, and a terse prompt yields a terse answer.
  • Multiple choice: include the options in the prompt and end with "Answer with the letter of the correct option." Withholding the options costs a large amount of accuracy.

Training

Base ZJU-AI4H/Hulu-Med-7B @ 258594714a0d3835eb2c9e4cc165a4242e606d71
Method AdaLoRA (init_r=32, target_r=16), merged into the base for release
Precision bf16
Optimiser AdamW, cosine schedule
Corpus 50,000 curated rows · 32 sources · 8 modalities
Hardware 1× NVIDIA A10G (22 GB)
Selection lowest held-out validation loss (0.89925)

Classification datasets were not trained as bare labels. A label like malignant is not language, and training image → "malignant" teaches a model to emit one token rather than to describe evidence. Every classification source was rendered into a question/answer pair with varied phrasing, and multi-label chest-X-ray observations were rendered as Findings/Impression reports that state pertinent negatives. Uncertain labels became explicit "cannot be determined from this image" rather than being dropped or forced positive.

The corpus was contamination-filtered against all evaluation sets (measured overlap: 0).

Training data and licences

This model inherits obligations from its training data. Principal sources in the 50k corpus:

Source Share Terms
eltorio/ROCOv2-radiology 16.0% research use
UCSC-VLAA/MedTrinity-25M 16.0% research use
YYama0/RadFig-VQA 16.0% research use
danjacobellis/chexpert 16.0% Stanford CheXpert research-use terms
jamessyx/PathCap 16.0% CC-BY-NC-2.0 — non-commercial
MLforHealthcare/mimic-cxr 8.8% PhysioNet credentialed DUA
redlessone/Derm1M 4.3% research use
25 further sources 6.9% research use

Because of PathCap and MIMIC-CXR in particular, these weights are released for non-commercial research only and access is gated. Commercial use is not permitted.

Limitations

  • Not validated clinically. No prospective study, no regulatory clearance, no evidence of safety or efficacy in any care setting.
  • MedXpertQA 27.45 — hard expert-level reasoning remains weak, and slightly below base.
  • Benchmark gains do not transfer automatically to real clinical distributions; the evaluation sets are public benchmarks, not prospective patient data.
  • Trained predominantly on English text.
  • Will hallucinate findings when the image is ambiguous, low quality, or out of distribution.
  • Demographic performance was not audited; disparate error rates across patient groups are likely and unmeasured.

Citation

@misc{netra_med_v3_7b,
  title  = {Netra-Med-V3-7B: a medical vision-language model fine-tuned from Hulu-Med-7B},
  author = {Dipankar},
  year   = {2026},
  url    = {https://huggingface.co/dipankar500/Netra-Med-V3-7B}
}

Please also cite the base model, Hulu-Med, and the underlying datasets.

Downloads last month
-
Safetensors
Model size
8B params
Tensor type
BF16
·
Inference Providers NEW
This model isn't deployed by any Inference Provider. 🙋 Ask for provider support

Model tree for dipankar500/Netra-Med-V3-7B

Finetuned
(1)
this model

Paper for dipankar500/Netra-Med-V3-7B