Score Your AI Output
Against Your Prompt
Upload your prompt, reference image, and AI-generated output. Sentinel evaluates how well the result matches your instructions across 6 quality dimensions.
Drop or click
JPG, PNG, WebP
Drop or click
JPG, PNG, WebP
No signup required. Free to use. Powered by Sentinel.
See How It Works
Provide your prompt, a reference image, and the AI-generated result. The scorer evaluates the output across 6 quality dimensions.
"Professional headshot of a man, brown tuxedo, orange bow tie, light blue studio background, sharp focus"
Notes
Example scored with FLUX.1 [dev] output evaluated by Gemini vision.
How AI Output Evaluation Works
Manually checking every AI output does not scale. Sentinel uses vision models to evaluate your output against your prompt and reference inputs, catching issues humans miss.
Provide Your Inputs
Paste the prompt you used, upload the AI-generated output, and optionally add the reference image you fed to the model.
Sentinel Evaluates
A vision model analyzes prompt adherence, visual quality, composition, lighting, reference fidelity, and AI artifact presence.
Get Your Scorecard
Receive scores across 6 dimensions with a PASS/FAIL verdict and plain-English notes explaining exactly what to fix.
Who Uses AI Output Scoring
AI Image Pipelines
Generating images with FLUX, Stable Diffusion, or Midjourney? Score every output against your prompt before it reaches users. Catch hallucinations and prompt misalignment automatically.
Explore our AI model marketplaceE-Commerce Product Photography
Verify AI-generated product photos match your brief. Check that backgrounds, lighting, and product placement match what you asked for.
See our Product Scoring toolProfessional Headshots
Score AI headshots against reference photos. Verify face similarity, background accuracy, and professional appearance before delivery.
Read the BetterPic case studyQuality Gates in CI/CD
Integrate Sentinel into your image generation pipeline. Automatically reject outputs that score below your threshold and trigger re-generation.
Learn about SentinelEvaluate at Scale with the Sentinel API
This free tool is powered by the same Sentinel API that production teams use. Define custom evaluation schemas, pass reference images, and score any AI output with a single API call.
import requests
response = requests.post(
"https://sentinel.bettergroup.io/v1/score/dynamic",
headers={"x-api-key": "YOUR_API_KEY"},
json={
"target_image": "https://your-output-image.jpg",
"reference_images": [
{"image": "https://your-input-image.jpg",
"label": "reference_input"}
],
"instructions": "Evaluate how well the output matches the prompt: ...",
"schema": {
"overall_score": {"type": "integer", "min": 0, "max": 100},
"prompt_adherence": {"type": "integer", "min": 0, "max": 100},
"visual_quality": {"type": "integer", "min": 0, "max": 100},
"result": {"type": "string", "enum": ["PASS", "FAIL"]},
"notes": {"type": "array", "items": {"type": "string"}}
}
}
)
print(response.json()["model_output"]){
"model_output": {
"overall_score": 87,
"prompt_adherence": 92,
"visual_quality": 84,
"composition": 90,
"lighting": 85,
"artifacts": 89,
"reference_match": 78,
"result": "PASS",
"notes": [
"Strong prompt adherence - all described elements present",
"Minor lighting inconsistency in upper-left quadrant"
]
},
"metadata": {
"processing_time_ms": 10420,
"model_used": "gemini-3-flash-preview"
}
}| Feature | Free Tool | Sentinel API |
|---|---|---|
| Evaluations per day | 5 | Unlimited |
| Scoring dimensions | 6 standard | Fully customizable |
| Custom evaluation schemas | - | Yes |
| Reference images | 1 | Unlimited |
| Batch processing | - | Yes |
| Price | Free | Usage-based |
AI Evaluation vs. Manual Review
| Dimension | Manual Review | Sentinel Scoring |
|---|---|---|
| Speed | 15-30 sec/image | Under 10 sec/image |
| Consistency | Varies by fatigue | Identical criteria every time |
| Scale | ~500 images/day | 100K+ images/day via API |
| Prompt checking | Subjective | Automated against prompt text |
| AI artifacts | Often missed | Trained to detect |
| Reference matching | Eye comparison | Quantified 0-100 scores |
| Availability | Business hours | 24/7 |
Frequently Asked Questions
Stop Shipping Bad AI Outputs
This free tool evaluates a few images. Sentinel evaluates millions. Add automated quality gates to your AI pipeline - catch prompt misalignment, detect artifacts, and enforce standards before outputs reach your users.