2026-07-08 08:57:50 +00:00

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# MMStar
## Overview
MMStar is an elite vision-indispensable multimodal benchmark designed to ensure genuine visual dependency in evaluation. Each sample is carefully curated to require actual visual understanding, minimizing data leakage and testing advanced multimodal capabilities.
## Task Description
- **Task Type**: Vision-Dependent Multiple-Choice QA
- **Input**: Image + multiple-choice question requiring visual understanding
- **Output**: Single answer letter (A/B/C/D)
- **Domains**: Perception, reasoning, math, science & technology
## Key Features
- Ensures visual dependency - questions cannot be answered without images
- Minimal data leakage from training corpora
- Tests advanced multimodal reasoning capabilities
- Six categories: coarse perception, fine-grained perception, instance reasoning, logical reasoning, math, science & technology
- High-quality curated samples with verified visual necessity
## Evaluation Notes
- Default evaluation uses the **val** split
- Primary metric: **Accuracy** on multiple-choice questions
- Uses Chain-of-Thought (CoT) prompting with "ANSWER: [LETTER]" format
- Results reported per category and overall
## Properties
| Property | Value |
|----------|-------|
| **Benchmark Name** | `mm_star` |
| **Dataset ID** | [evalscope/MMStar](https://modelscope.cn/datasets/evalscope/MMStar/summary) |
| **Paper** | N/A |
| **Tags** | `Knowledge`, `MCQ`, `MultiModal` |
| **Metrics** | `acc` |
| **Default Shots** | 0-shot |
| **Evaluation Split** | `val` |
## Data Statistics
| Metric | Value |
|--------|-------|
| Total Samples | 1,500 |
| Prompt Length (Mean) | 390.23 chars |
| Prompt Length (Min/Max) | 272 / 2023 chars |
**Per-Subset Statistics:**
| Subset | Samples | Prompt Mean | Prompt Min | Prompt Max |
|--------|---------|-------------|------------|------------|
| `coarse perception` | 250 | 350.8 | 282 | 784 |
| `fine-grained perception` | 250 | 334.98 | 277 | 608 |
| `instance reasoning` | 250 | 379.02 | 273 | 684 |
| `logical reasoning` | 250 | 427.22 | 284 | 2023 |
| `math` | 250 | 467.36 | 292 | 891 |
| `science & technology` | 250 | 381.98 | 272 | 1173 |
**Image Statistics:**
| Metric | Value |
|--------|-------|
| Total Images | 1,500 |
| Images per Sample | min: 1, max: 1, mean: 1 |
| Resolution Range | 114x66 - 3160x2136 |
| Formats | jpeg |
## Sample Example
**Subset**: `coarse perception`
```json
{
"input": [
{
"id": "57e256b8",
"content": [
{
"text": "Answer the following multiple choice question.\nThe last line of your response should be of the following format:\n'ANSWER: [LETTER]' (without quotes)\nwhere [LETTER] is one of A,B,C,D. Think step by step before answering.\n\nWhich option describe the object relationship in the image correctly?\nOptions: A: The suitcase is on the book., B: The suitcase is beneath the cat., C: The suitcase is beneath the bed., D: The suitcase is beneath the book."
},
{
"image": "[BASE64_IMAGE: jpeg, ~37.2KB]"
}
]
}
],
"choices": [
"A",
"B",
"C",
"D"
],
"target": "A",
"id": 0,
"group_id": 0,
"subset_key": "coarse perception",
"metadata": {
"index": 0,
"category": "coarse perception",
"l2_category": "image scene and topic",
"source": "MMBench",
"split": "val",
"image_path": "images/0.jpg"
}
}
```
## Prompt Template
**Prompt Template:**
```text
Answer the following multiple choice question.
The last line of your response should be of the following format:
'ANSWER: [LETTER]' (without quotes)
where [LETTER] is one of A,B,C,D. Think step by step before answering.
{question}
```
## Usage
### Using CLI
```bash
evalscope eval \
--model YOUR_MODEL \
--api-url OPENAI_API_COMPAT_URL \
--api-key EMPTY_TOKEN \
--datasets mm_star \
--limit 10 # Remove this line for formal evaluation
```
### Using Python
```python
from evalscope import run_task
from evalscope.config import TaskConfig
task_cfg = TaskConfig(
model='YOUR_MODEL',
api_url='OPENAI_API_COMPAT_URL',
api_key='EMPTY_TOKEN',
datasets=['mm_star'],
dataset_args={
'mm_star': {
# subset_list: ['coarse perception', 'fine-grained perception', 'instance reasoning'] # optional, evaluate specific subsets
}
},
limit=10, # Remove this line for formal evaluation
)
run_task(task_cfg=task_cfg)
```