Cat Jam Free 33.8/100Rank 26/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-5.6 Luna leads Cat Jam Free by 4.3 points on StealthMark, 37.8 to 33.5. It leads on 7 of 9 benchmarks, including Latch, and Cat Jam Free on 2, including Foresight. GPT-5.6 Luna scores higher on Newton's Mirror, with its largest category advantage in materials and scale.
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 sourceGPT-5.6 Luna ↗
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.
GPT-5.6 Luna
The room enclosure has coherent symmetric perspective, with the overhead panel, sphere and black aligned centrally. The sphere and airborne black occupy substantially lower positions than the reference framing, inconsistent with the prescribed camera aim. The diagonal crimson streak does not establish the required surface transport. Faint wall sphere images provide limited mirrored correspondence, but the shallow floor image, missing receding chains, absent nested sphere imagery and sparse emitter mapping leave most reflection structure unsupported.
| Category | Cat Jam Free | GPT-5.6 Luna |
|---|---|---|
| State at 600 ms | 14.0/25 | 15.0/25 |
| Camera and placement | 4.0/15 | 4.0/15 |
| Reflections | 3.5/120 | 3.5/120 |
| Materials and scale | 4.0/10 | 6.5/10 |
| 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.


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.
GPT-5.6 Luna
Six pale, outward-facing heads and six rounded lobes make the knot recognizable. The central hexagonal opening remains clear. However, broad gray crossing panels flatten the weave, several inner joins resemble capped strips, and sparse oversized scale marks leave the bodies looking more like decorated ribbons than living snakes.
| Category | Cat Jam Free | GPT-5.6 Luna |
|---|---|---|
| Task & likeness | 5.5/10 | 7.5/10 |
| Anatomy & construction | 5.5/10 | 6.0/10 |
| Space & placement | 6.0/10 | 6.5/10 |
| Light & reflections | 6.0/10 | 5.0/10 |
| Purposeful detail | 4.0/10 | 5.5/10 |
| Artistry & character | 5.5/10 | 6.0/10 |
| Materials & effects | 5.0/10 | 5.0/10 |
| Visual integrity | 6.5/10 | 6.0/10 |
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.
GPT-5.6 Luna
A pale serpent woven into an interlocking knot tests connected anatomy, repeated structure and readable overlaps. Organic surface detail must work with the overall geometry.
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.
GPT-5.6 Luna
The central portrait, dark clothing, crossed hands and muted landscape clearly evoke Mona Lisa. Replication is limited by the elongated face, conspicuous eyes and simplified smile. Overlapping fingers have uncertain anatomy, while broad gradients and heavy outlines flatten the portrait. The composition and restrained palette remain coherent.
| Category | Cat Jam Free | GPT-5.6 Luna |
|---|---|---|
| Task & likeness | 2.5/10 | 3.5/10 |
| Anatomy & construction | 2.0/10 | 3.5/10 |
| Space & placement | 4.0/10 | 4.0/10 |
| Light & reflections | 3.5/10 | 4.5/10 |
| Purposeful detail | 3.0/10 | 4.0/10 |
| Artistry & character | 3.0/10 | 4.0/10 |
| Materials & effects | 2.5/10 | 3.5/10 |
| Visual integrity | 5.5/10 | 4.5/10 |
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.
GPT-5.6 Luna
The warm sunset, palm silhouette and varied beach activities create an appealing, readable composition. Animals, birds and a broad sun reflection satisfy the brief. Drawing remains elementary: angular airborne sea animals lack splash or convincing motion, the crab's claws are awkwardly constructed, and repeated reflection bands suggest a stepped platform. Clean outlines and pleasant colors exceed the anatomical and spatial sophistication.
| Category | Cat Jam Free | GPT-5.6 Luna |
|---|---|---|
| Task & likeness | 7.0/10 | 7.5/10 |
| Anatomy & construction | 4.5/10 | 4.0/10 |
| Space & placement | 4.5/10 | 5.5/10 |
| Light & reflections | 4.0/10 | 4.0/10 |
| Purposeful detail | 4.0/10 | 6.5/10 |
| Artistry & character | 4.5/10 | 3.5/10 |
| Materials & effects | 4.5/10 | 4.0/10 |
| Visual integrity | 5.5/10 | 3.5/10 |
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.
GPT-5.6 Luna
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.
GPT-5.6 Luna
Expressive animals, a striped tail and clean outlines make the scene appealing and readable. The raccoon sits convincingly on the dog's back, but the overlapping steering paws are ambiguous and the control stem stops above the hull. Broad wake shapes suggest motion; the glowing sun lacks a corresponding water reflection.
| Category | Cat Jam Free | GPT-5.6 Luna |
|---|---|---|
| Task & likeness | 6.0/10 | 7.0/10 |
| Anatomy & construction | 5.0/10 | 5.0/10 |
| Space & placement | 5.0/10 | 6.5/10 |
| Light & reflections | 5.0/10 | 6.0/10 |
| Purposeful detail | 6.0/10 | 6.5/10 |
| Artistry & character | 5.0/10 | 4.5/10 |
| Materials & effects | 5.0/10 | 5.5/10 |
| Visual integrity | 4.5/10 | 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.


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.
GPT-5.6 Luna
A recognizable pelican cyclist with an expressive profile, balanced composition and controlled outlines. Head, neck and torso connect coherently. The bicycle wheels and frame are convincing, but overlapping feet obscure pedal contact, the drivetrain lacks a clear chain, and the wing's handlebar grip is schematic. Atmospheric color succeeds more strongly than directional lighting or material depth.
| Category | Cat Jam Free | GPT-5.6 Luna |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 5.5/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 5.0/10 | 6.5/10 |
| Purposeful detail | 5.5/10 | 6.5/10 |
| Artistry & character | 5.5/10 | 5.5/10 |
| Materials & effects | 6.5/10 | 7.0/10 |
| Visual integrity | 6.5/10 | 6.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.