STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GLM-5.3 vs Union Alpha

Union Alpha scores 9.1 points higher overall (60.0 vs 50.9). Union Alpha scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms. Union Alpha’s overall score includes one estimated scene.

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Model guide ↗

Overall StealthMark

50.9/100
60.0/100Estimated · 1 missing scene

General Intelligence

27.5/100
40.9/100Partial coverage

Visual Intelligence

69.6/100
73.2/100Partial coverage

Newton's Mirror

Same prompt

Physics, perspective and recursive reflections, tested together. Explore the test ↗

GLM-5.321.4/100

GLM-5.3: Newton's Mirror SVG benchmark
Researcher observations

The sphere has readable rounded volume, and the compact black blob remains distinctly above it, supporting pre-impact separation. The extensive red and cyan coatings do not establish the required interaction history or paint scale. The sphere and black are substantially displaced downward. A centered upper panel, paired side patches and a vertically aligned partial floor image provide limited reflection cues, but ordered mirror-room repetitions and curved spherical imagery are largely missing.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Union Alpha38.3/100

Union Alpha: Newton's Mirror SVG benchmark
Researcher observations

Recognizable near-field sphere placement and bilateral convergence provide limited optical structure. Broad gray regions interrupt lateral sightlines and truncate side-floor images. Missing outer chains, absent nested sphere imagery and incomplete planar and curved emitter mappings dominate the reflection system.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Compare category scores
CategoryGLM-5.3Union Alpha
State at 600 ms11.0/2525.0/25
Camera and placement9.5/1515.0/15
Reflections10.0/12019.0/120
Materials and scale8.0/1010.0/10
Floor-damage reward0.0/100.0/10

Selfie

GLM-5.379.3/100

GLM-5.3: Selfie SVG benchmark
Researcher observations

A luminous organic creature meets a geometric reflection in a carefully framed oval mirror. Shared glowing cores and fingertip contact make the introspective symbolism clear. Gold, cream and blue establish a controlled hierarchy. The creature’s lower anatomy and shoulder transition remain loosely defined, while ground contact and reflected depth are mostly symbolic. Elegant vector illustration rather than photographic rendering.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Compare category scores
CategoryGLM-5.3Union Alpha
Prompt & likeness9.0/10—
Anatomy & construction7.0/10—
Space & placement7.5/10—
Light & reflections8.0/10—
Purposeful detail8.0/10—
Artistry & character8.5/10—
Materials & effects7.5/10—
Visual integrity8.0/10—

Beach

Different prompts

GLM-5.377.3/100

GLM-5.3: Beach SVG benchmark
Researcher observations

A cohesive, colorful beach illustration with an inviting sunset, readable animals and playful foreground objects. Crisp silhouettes and small accessories reward inspection. Depth remains shallow, airborne dolphins lack convincing launch splashes, and several objects lack grounding shadows. The broad dark shape across the sun weakens the focal hierarchy.

Exact prompt

Create an SVG of a amazing beach scene. Sunset, animals, fun, birds, reflections Make it a masterpiece, no tools allowed

Union Alpha80.0/100

A beach at sunset with a palm tree, turtle, crab, birds, and a leaping dolphin.
Researcher observations

A cohesive sunset palette, sweeping shoreline and playful animals make an appealing beach illustration. The sun’s reflection establishes a clear focal axis, balanced by the palm and umbrella. Clean silhouettes and small decorative features reward inspection, though simplified anatomy, repetitive reflection bars and generic oval shadows limit volume and naturalism.

Exact prompt

Create an SVG of a amazing beach scene. Sunset, animals, fun, birds, reflections

Compare category scores
CategoryGLM-5.3Union Alpha
Prompt & likeness8.5/109.0/10
Anatomy & construction7.5/107.5/10
Space & placement7.0/108.0/10
Light & reflections7.5/107.5/10
Purposeful detail7.5/108.0/10
Artistry & character8.0/108.0/10
Materials & effects7.0/107.0/10
Visual integrity8.5/108.5/10

Mona Lisa

Different prompts

GLM-5.355.0/100

GLM-5.3: Mona Lisa SVG benchmark
Researcher observations

Recognizable Mona Lisa motifs include the dark veil, restrained smile, folded hands and muted landscape. Clean silhouettes and balanced framing support the portrait, but the frontal symmetry, elongated face, minimally articulated hands and broad background bands make the replication basic. Facial shading offers some volume; clothing and landscape remain mostly flat.

Exact prompt

Replicate mona-lisa as SVG Make it a masterpiece, no tools allowed

Union Alpha64.0/100

An SVG interpretation of the Mona Lisa, with folded hands and a landscape background.
Researcher observations

The centered portrait, folded hands, dark clothing and hazy landscape clearly evoke the Mona Lisa. Muted colors and soft facial shading create a coherent illustration, but replication remains schematic: the face is broad, eyes outlined, smile simplified and overlapping fingers poorly resolved. Angular landscape shapes and flat fabric limit depth and painterly richness.

Exact prompt

Replicate mona-lisa as SVG

Compare category scores
CategoryGLM-5.3Union Alpha
Prompt & likeness6.0/107.0/10
Anatomy & construction5.5/106.0/10
Space & placement5.5/106.5/10
Light & reflections4.5/106.5/10
Purposeful detail4.5/105.5/10
Artistry & character5.5/106.5/10
Materials & effects4.0/105.0/10
Visual integrity7.5/107.5/10

Raccoon

Different prompts

GLM-5.362.8/100

GLM-5.3: Raccoon SVG benchmark
Researcher observations

The raccoon rides on the dog's back, and the dog reaches toward visible handlebars. Expressive faces and clean colors make the action readable. Overlapping paws and hindquarters weaken anatomical clarity, while the vehicle resembles a flat board with a thin steering post. The wake suggests motion, but water contact, shadows and reflections receive little development.

Exact prompt

Generate an SVG: A raccoon sits on a dog's back while the dog steers a jet ski Make it a masterpiece, no tools allowed

Union Alpha72.0/100

A raccoon rides on a dog as the dog steers a red jet ski.
Researcher observations

Expressive animals, a readable riding arrangement and sweeping spray create an appealing cartoon. The raccoon sits convincingly on the dog's back, but the dog's paw does not clearly grip the handlebar, whose connection to the hull is unresolved. Flat lighting provides little volume or reflection. A dark rectangular strip interrupts the upper-right background.

Exact prompt

A raccoon sits on a dog's back while the dog steers a jet ski

Compare category scores
CategoryGLM-5.3Union Alpha
Prompt & likeness8.0/108.0/10
Anatomy & construction5.5/106.5/10
Space & placement6.0/107.5/10
Light & reflections4.5/105.5/10
Purposeful detail6.5/107.5/10
Artistry & character6.5/108.0/10
Materials & effects5.0/107.5/10
Visual integrity7.5/107.0/10

Pelican

Benchmax control

Outside General and Visual Intelligence.

GLM-5.359.8/100

GLM-5.3: Pelican SVG benchmark
Researcher observations

The expressive pelican, broad bill and clean coastal composition make the subject immediately readable. Both legs connect to the body and reach pedals, but the front wheel lacks a connected fork and the wings do not engage visible handlebars. Crisp spokes and feather lines add interest; flat lighting, absent ground shadows and a fish floating above the horizon weaken physical coherence.

Exact prompt

Generate an SVG of a pelican riding a bicycle Make it a masterpiece, no tools allowed

Union Alpha73.8/100

A pelican riding a teal bicycle beneath a sunny blue sky.
Researcher observations

The pelican is immediately recognizable, with an expressive face, convincing bill silhouette and appealing pastel composition. Both legs connect to feet, and the wing reaches the handlebar. Bicycle construction is less resolved: the far pedal lacks a clear crank connection and no chain is visible. Clean contours and orderly spokes support the illustration, while flat lighting and simplified surfaces limit depth.

Exact prompt

Generate an SVG of a pelican riding a bicycle

Compare category scores
CategoryGLM-5.3Union Alpha
Prompt & likeness7.5/108.5/10
Anatomy & construction4.5/106.5/10
Space & placement6.0/107.5/10
Light & reflections4.0/106.0/10
Purposeful detail6.5/107.0/10
Artistry & character7.0/108.0/10
Materials & effects5.0/106.5/10
Visual integrity7.0/108.5/10