Hy4 Preview53.1/100Rank 12/43

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Muse Spark Open leads Hy4 Preview by 0.4 points on StealthMark, 44.4 to 44.0. It leads on 5 of 9 benchmarks, including Latch, and Hy4 Preview on 4, including Foresight. Hy4 Preview scores higher on Newton's Mirror, with its largest category advantage in reflections.
See the difference ↘BENCHMARK BY BENCHMARK
Planning and learning across maze levels. Collect coins while avoiding ghosts. Ghosts move before the player each turn, and collisions cost a life. 3 levels in sequence, up to 66 turns in total. Earlier moves and outcomes carry forward, testing learning across levels.


Cooperative planning across puzzle levels. Coordinate two robots to push numbered cores onto matching sockets. Pressure plates hold doors open; moving either robot uses one turn. 5 levels in sequence, up to 152 turns in total. Earlier moves and outcomes carry forward, testing learning across levels.


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


Hy4 Preview
The central sphere, compact airborne black bead and broad paint ordering are supported. Contact and transport history remain partly unresolved. The optical system provides only isolated first images and light patches, with little evidence of the extensive ordered reflection structure. Rounded metal and paint gloss are more successful than the reflected contents.
Muse Spark Open
The airborne black blob and deformed paint support the broad contact sequence, although cyan attachment and wheel-directed transport remain partial. The sphere and black blob have substantial framing errors. The dominant limitation is the largely absent mirror system: faint wall circles and isolated highlights provide little evidence of recursive room geometry or curved nested reflections. Oversized compact paint features and diffuse material treatment further limit credit.
| Category | Hy4 Preview | Muse Spark Open |
|---|---|---|
| State at 600 ms | 18.0/25 | 19.0/25 |
| Camera and placement | 11.5/15 | 6.0/15 |
| Reflections | 29.5/120 | 8.0/120 |
| Materials and scale | 7.5/10 | 3.5/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 |
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Visual construction and creative interpretation.


Hy4 Preview
A cohesive, appealing illustration with a serene face, luminous palette and complete framing. The separated head and torso weaken anatomical coherence, while crowded wing attachments and angular sash folds limit the requested suppleness. Clean execution and decorative detail exceed the clarity of the underlying construction.
Muse Spark Open
The rounded silhouette and asymmetric expression make an appealing baby elephant, supported by a quiet background and grounding shadow. The protective action remains difficult to read: forefeet cannot be confidently traced into a grip, and seed contact is crowded by fine lines. Controlled simple shapes provide charm, but limited anatomical clarity, shading and surface detail leave the execution uneven.
| Category | Hy4 Preview | Muse Spark Open |
|---|---|---|
| Task & likeness | 6.0/10 | 5.0/10 |
| Anatomy & construction | 5.5/10 | 4.5/10 |
| Space & placement | 7.5/10 | 6.0/10 |
| Light & reflections | 7.0/10 | 5.0/10 |
| Purposeful detail | 6.5/10 | 6.0/10 |
| Artistry & character | 5.0/10 | 5.0/10 |
| Materials & effects | 7.0/10 | 5.0/10 |
| Visual integrity | 5.5/10 | 6.5/10 |
Hy4 Preview
A young blue dragon floating among clouds tests curved anatomy, expressive features and the contrast between soft clouds and glossy surfaces.
Muse Spark Open
A small elephant protecting a delicate seed tests expressive anatomy, physical contact and contrasting organic materials.
Precise visual recall and portrait reconstruction.


Hy4 Preview
A recognizable but basic Mona Lisa interpretation with a cohesive earthy palette and atmospheric hills. The rigid neck, generic face and unresolved folded-hand pose limit replication and anatomy. Large silhouettes and layer boundaries are comparatively clear, warranting stronger integrity credit than the sparse detail and simplified construction.
Muse Spark Open
A recognizable, orderly interpretation with clean major contours, connected body forms and modest facial shading. Wide eyes, frontal symmetry and schematic hands limit likeness and expression. Layered scenery establishes basic depth, but shallow arm overlaps, flat clothing and sparse fine detail keep the execution basic and uneven.
| Category | Hy4 Preview | Muse Spark Open |
|---|---|---|
| Task & likeness | 2.5/10 | 3.0/10 |
| Anatomy & construction | 2.5/10 | 3.0/10 |
| Space & placement | 2.5/10 | 5.0/10 |
| Light & reflections | 1.5/10 | 4.5/10 |
| Purposeful detail | 2.5/10 | 4.0/10 |
| Artistry & character | 1.5/10 | 3.0/10 |
| Materials & effects | 2.5/10 | 4.0/10 |
| Visual integrity | 4.0/10 | 6.0/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


Hy4 Preview
A cheerful beach illustration fulfills the visible subject requirements with coherent foreground construction and a harmonious sunset palette. Shallow depth, schematic reflections, ambiguous blue airborne forms and exposed geometry beneath the sunset limit its finish. Small accessories are readable, but materials and surface detail remain simplified.
Muse Spark Open
A coherent sunset beach with readable activities, balanced framing and controlled colour transitions. Small accessories add interest, but schematic anatomy, limited surface detail, weak directional shadows and a geometric reflection constrain its finish. Most shapes and overlaps remain clean.
| Category | Hy4 Preview | Muse Spark Open |
|---|---|---|
| Task & likeness | 8.5/10 | 8.0/10 |
| Anatomy & construction | 5.5/10 | 6.0/10 |
| Space & placement | 6.5/10 | 6.5/10 |
| Light & reflections | 5.0/10 | 5.5/10 |
| Purposeful detail | 6.0/10 | 6.5/10 |
| Artistry & character | 6.0/10 | 5.5/10 |
| Materials & effects | 5.0/10 | 6.0/10 |
| Visual integrity | 6.0/10 | 8.0/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


Hy4 Preview
This benchmark has not been assessed yet.
Muse Spark Open
This benchmark has not been assessed yet.
A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.
Scene composition and interacting subjects.


Hy4 Preview
A lively cartoon communicates the animal pair traveling across water. Curving waves, rising spray and locally modeled gray forms strengthen motion and volume. Ambiguous seating, simplified joints and unclear control routing limit construction. Competing focal elements, decorative foam and inconsistent illumination leave the finish uneven.
Muse Spark Open
Expressive faces, distinct accessories and clean color separation make the scene appealing and recognizable. Character detail is stronger than the functional construction: steering contact, limb overlaps and seating remain ambiguous. The readable hull and lively spray establish motion, while limited directional shading and simplified surfaces constrain depth and physical coherence.
| Category | Hy4 Preview | Muse Spark Open |
|---|---|---|
| Task & likeness | 7.0/10 | 5.5/10 |
| Anatomy & construction | 4.5/10 | 4.0/10 |
| Space & placement | 6.0/10 | 5.5/10 |
| Light & reflections | 6.0/10 | 4.0/10 |
| Purposeful detail | 5.5/10 | 7.0/10 |
| Artistry & character | 4.5/10 | 4.0/10 |
| Materials & effects | 6.5/10 | 4.5/10 |
| Visual integrity | 6.5/10 | 5.0/10 |
A jet-ski scene pairs a canine driver with a raccoon passenger. It tests the placement and contact of interacting subjects, along with vehicle construction.
Subject construction and spatial relationships.


Hy4 Preview
A recognizable, playful pelican cyclist with readable wheels, accessories and landscape layers. Form shading and ground shadows provide competent depth. Angular legs, uncertain pedal engagement and absent steering contact limit the riding construction; crowded overlaps and simple surfaces constrain refinement.
Muse Spark Open
A controlled, appealing cartoon with a recognizable pelican, expressive face and clean curved forms. Feather lines, spokes and bill shading provide useful complexity. Aligned wheels and a ground shadow establish placement, but uncertain pedal contacts and obscured mechanical connections weaken support and riding action. Lighting remains loosely coordinated with the sun.
| Category | Hy4 Preview | Muse Spark Open |
|---|---|---|
| Task & likeness | 7.5/10 | 7.5/10 |
| Anatomy & construction | 4.5/10 | 5.0/10 |
| Space & placement | 6.5/10 | 6.0/10 |
| Light & reflections | 7.0/10 | 5.0/10 |
| Purposeful detail | 6.0/10 | 6.5/10 |
| Artistry & character | 5.0/10 | 5.5/10 |
| Materials & effects | 5.0/10 | 6.0/10 |
| Visual integrity | 7.0/10 | 7.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.