Cat Jam Free 33.8/100Rank 26/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Callstack Apex leads Cat Jam Free by 16.0 points on StealthMark, 49.5 to 33.5. It leads on 7 of the 8 benchmarks with results for both and Cat Jam Free on 1, including Latch. Pixel Canary scores higher on Newton's Mirror, with its largest category advantage in camera and placement.
See the difference ↘On every task, result quality and reasoning tokens are each compared with all measured models and weighed equally. Each dot is one model.
BENCHMARK BY BENCHMARK
DATASHEET
Full datasheets, every price and sourceCallstack Apex ↗
Anticipating threats and planning ahead. 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 and learning from experience. 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 ↗


Cat Jam Free
The image conveys a supported central sphere, separate black paint and crimson below cyan. Its contact and transport story is partially resolved. The exterior cutaway camera and largely missing mirror system dominate the limitations; isolated discs and smooth highlights provide little coherent optical structure.
Callstack Apex
The principal sphere placement and paint contact sequence are supported. Isolated sphere and panel images provide limited optical structure, but missing lateral chains and side-floor continuations prevent a coherent repeating mirror room. The main and reflected spheres lack ordered curved nested imagery, while sparse planar emitter images and incomplete spherical emitter mapping leave most of the reflection system unsupported.
| Category | Cat Jam Free | Callstack Apex |
|---|---|---|
| State at 600 ms | 14.0/25 | 20.0/25 |
| Camera and placement | 4.0/15 | 13.0/15 |
| Reflections | 3.5/120 | 10.0/120 |
| Materials and scale | 4.0/10 | 7.0/10 |
| 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.


Cat Jam Free
A coherent, restrained cat illustration captures the pale palette and intent eyes. Its central expressive requirement—the committed forward-and-down neck bob—is insufficiently articulated. Simple geometry, faint paw construction and minimal surface detail limit the physical presence and finish.
Callstack Apex
The cheerful yellow bird, cream eyes, orange features and miniature teal console closely match the brief. Clean block edges, restrained colors and soft shadows create an appealing composition. The body reads more like a gridded disc than a fully cubic sphere, and the outlined left wing has limited volume. The right wing reaches the cyan block, though its grip is ambiguous.
| Category | Cat Jam Free | Callstack Apex |
|---|---|---|
| Task & likeness | 5.5/10 | 8.5/10 |
| Anatomy & construction | 5.5/10 | 7.0/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 6.0/10 | 7.5/10 |
| Purposeful detail | 4.0/10 | 7.5/10 |
| Artistry & character | 5.5/10 | 7.0/10 |
| Materials & effects | 5.0/10 | 7.0/10 |
| Visual integrity | 6.5/10 | 7.5/10 |
Cat Jam Free
An ivory cat nods intently to music beside a tiny speaker. The scene tests feline anatomy, movement conveyed through a still pose and the contrast between pale fur and woven fabric.
Callstack Apex
A rounded bird built from small cubes explores a miniature machine. The scene tests block construction, expressive proportions, contact and soft lighting.
Precise visual recall and portrait reconstruction.


Cat Jam Free
The portrait is recognizable and cleanly assembled, but replication remains basic. Its frontal symmetry, elongated silhouette, simplified facial likeness and unresolved hands differ markedly from the original. Modest skin gradients provide volume, while clothing and landscape rely on broad, flat shapes.
Callstack Apex
The framed portrait recalls Mona Lisa through dark hair, folded arms and a hazy landscape. Replication is limited by wide, staring eyes, an elongated neck and a downturned mouth. The overlapping hands lack convincing finger and wrist construction. Soft tonal shading suggests volume, but pervasive blur obscures clothing, landscape and anatomical detail.
| Category | Cat Jam Free | Callstack Apex |
|---|---|---|
| Task & likeness | 2.5/10 | 3.5/10 |
| Anatomy & construction | 2.0/10 | 4.0/10 |
| Space & placement | 4.0/10 | 4.5/10 |
| Light & reflections | 3.5/10 | 6.0/10 |
| Purposeful detail | 3.0/10 | 4.5/10 |
| Artistry & character | 3.0/10 | 4.5/10 |
| Materials & effects | 2.5/10 | 5.5/10 |
| Visual integrity | 5.5/10 | 5.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


Cat Jam Free
The scene clearly supplies the requested beach subjects and playful activity. Clean silhouettes and warm gradients support readability, but elementary drawing, ambiguous parasol construction, weak grounding and a rigid sun reflection limit its depth and finish.
Callstack Apex
A cohesive sunset beach illustration with lively wildlife, playful accents, and an appealing warm-to-purple palette. Palm framing and the aligned sun reflection organize the scene, while connected silhouettes keep the activities readable. Schematic joints, ambiguous dolphin junctions, loosely matched reflections, and repetitive surface marks limit construction, lighting coherence, and material depth.
| Category | Cat Jam Free | Callstack Apex |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 4.5/10 | 4.5/10 |
| Space & placement | 4.5/10 | 7.5/10 |
| Light & reflections | 4.0/10 | 5.5/10 |
| Purposeful detail | 4.0/10 | 7.5/10 |
| Artistry & character | 4.5/10 | 6.5/10 |
| Materials & effects | 4.5/10 | 7.0/10 |
| Visual integrity | 5.5/10 | 4.0/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


Cat Jam Free
This benchmark has not been assessed yet.
Callstack Apex
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.


Cat Jam Free
An appealing cartoon demonstrates the back-riding arrangement through expressive faces and clean shapes. Uncertain steering contact, indistinct deck support and weak hull-water interaction limit physical coherence. Smooth gradients add volume, but simple rounded construction and sparse material detail constrain complexity and finish.
Callstack Apex
The raccoon clearly rides the dog's back, and the dog's paws reach the jet ski controls. Expressive faces, a sweeping tail and a strong sunset composition give the illustration character. Limbs remain connected, but the dog's foreleg joints and vehicle seating are loosely constructed. Angular splashes convey speed more successfully than convincing water displacement; lighting and reflections remain decorative.
| Category | Cat Jam Free | Callstack Apex |
|---|---|---|
| Task & likeness | 6.0/10 | 9.0/10 |
| Anatomy & construction | 5.0/10 | 7.0/10 |
| Space & placement | 5.0/10 | 7.5/10 |
| Light & reflections | 5.0/10 | 7.0/10 |
| Purposeful detail | 6.0/10 | 8.5/10 |
| Artistry & character | 5.0/10 | 7.5/10 |
| Materials & effects | 5.0/10 | 7.0/10 |
| Visual integrity | 4.5/10 | 8.0/10 |
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.

Cat Jam Free
A coherent cartoon with readable bicycle placement, controlled outlines and modest surface shading. The separated-looking upper bill weakens pelican likeness; schematic limbs, uncertain gripping contact and simplified mechanics constrain construction. Opaque wheel interiors flatten spatial relationships. Limited feather complexity and directional lighting keep the finish modest.
Callstack Apex
An appealing cartoon with a distinctive pelican, expressive eye, warm bill and carefully drawn bicycle wheels. The wing reaches the handlebar, but the feet do not clearly engage the pedals, weakening the riding mechanics. Layered hills create depth; limited ground shadows weaken contact. Clean curves and purposeful feather details give the illustration polish.
| Category | Cat Jam Free | Callstack Apex |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 6.5/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 5.0/10 | 7.5/10 |
| Purposeful detail | 5.5/10 | 8.0/10 |
| Artistry & character | 5.5/10 | 8.0/10 |
| Materials & effects | 6.5/10 | 7.5/10 |
| Visual integrity | 6.5/10 | 8.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.