GLM-5.3 59.1/100Rank 23/492 of 3 levels

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GLM-5.3 leads Step 5 Preview by 6.1 points on StealthMark, 45.1 to 39.0. It leads on 6 of 9 benchmarks, including Foresight, and Step 5 Preview on 3, including Latch. GLM-5.3 scores higher on Beach, with its largest category advantage in anatomy & construction.
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
Both take about 1M tokens of context.
Full datasheets, every price and sourceGLM-5.3 ↗Step 5 Preview ↗
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 ↗


GLM-5.3
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.
Step 5 Preview
The main sphere, airborne black and small colored features occupy broadly appropriate positions. Most of the defining mirror system is absent, and paint interaction remains only partially supported. The small paint features do not visibly establish a separate volume-scale violation.
| Category | GLM-5.3 | Step 5 Preview |
|---|---|---|
| State at 600 ms | 9.0/25 | 20.0/25 |
| Camera and placement | 9.0/15 | 13.5/15 |
| Reflections | 10.0/120 | 20.0/120 |
| Materials and scale | 7.0/10 | 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.


GLM-5.3
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.
Step 5 Preview
A charming diagonal climber and warm palette communicate the central idea. Simple rounded construction, crowded limb counting, uncertain footholds and an unattached upper shelf limit its physical coherence. Growth bands and the yarn trail add specificity, but the requested material distinctions and unravelled bootie remain underdeveloped.
| Category | GLM-5.3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 9.0/10 | 6.0/10 |
| Anatomy & construction | 7.0/10 | 4.5/10 |
| Space & placement | 7.0/10 | 5.0/10 |
| Light & reflections | 8.0/10 | 5.5/10 |
| Purposeful detail | 8.0/10 | 5.5/10 |
| Artistry & character | 7.0/10 | 5.0/10 |
| Materials & effects | 7.5/10 | 6.0/10 |
| Visual integrity | 8.0/10 | 5.0/10 |
GLM-5.3
An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.
Step 5 Preview
Character scenes test expression, anatomy, materials and coherent visual construction.
Precise visual recall and portrait reconstruction.


GLM-5.3
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.
Step 5 Preview
A recognizable, coherent simplification with purposeful facial contours and differentiated fingers. These provide more construction and detail than the broad silhouette alone suggests. The oversized face, frontal seated pose, unresolved wrists and sparse landscape still substantially limit likeness, depth and finish.
| Category | GLM-5.3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 3.0/10 | 4.0/10 |
| Anatomy & construction | 2.0/10 | 4.0/10 |
| Space & placement | 3.0/10 | 4.0/10 |
| Light & reflections | 4.5/10 | 3.5/10 |
| Purposeful detail | 3.0/10 | 4.0/10 |
| Artistry & character | 2.5/10 | 4.0/10 |
| Materials & effects | 3.5/10 | 3.0/10 |
| Visual integrity | 4.0/10 | 3.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


GLM-5.3
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.
Step 5 Preview
A recognizable sunset beach with clear warm-cool contrast and playful accessories. Basic animal construction, shallow foreground placement and schematic reflections limit spatial and physical credibility. Sparse descriptive detail and abruptly ended sky bands constrain the finish.
| Category | GLM-5.3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.5/10 | 4.0/10 |
| Anatomy & construction | 7.5/10 | 3.0/10 |
| Space & placement | 7.0/10 | 3.5/10 |
| Light & reflections | 7.0/10 | 3.5/10 |
| Purposeful detail | 8.0/10 | 3.0/10 |
| Artistry & character | 7.5/10 | 3.0/10 |
| Materials & effects | 6.5/10 | 3.5/10 |
| Visual integrity | 7.5/10 | 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.


GLM-5.3
This benchmark has not been assessed yet.
Step 5 Preview
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.


GLM-5.3
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.
Step 5 Preview
Recognizable animals, a bright palette and identifying accessories support a basic cartoon. Primitive anatomy, partial seated support, unresolved steering and weak hull-water contact limit the central action. Lighting and spray provide atmosphere without establishing convincing physical depth.
| Category | GLM-5.3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 6.5/10 | 4.0/10 |
| Anatomy & construction | 4.5/10 | 4.5/10 |
| Space & placement | 5.5/10 | 3.0/10 |
| Light & reflections | 4.0/10 | 3.5/10 |
| Purposeful detail | 5.0/10 | 4.0/10 |
| Artistry & character | 4.0/10 | 3.5/10 |
| Materials & effects | 5.0/10 | 3.0/10 |
| Visual integrity | 7.5/10 | 3.0/10 |
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.


GLM-5.3
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.
Step 5 Preview
The pelican and bicycle are recognizable, with a pleasant palette and basic diffuse shading. The riding relationship fails physically: the bird is unsupported, the front wheel is unmounted, and pedalling is unresolved. Simple geometric construction and sparse material treatment further limit the drawing.
| Category | GLM-5.3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 7.5/10 | 3.0/10 |
| Anatomy & construction | 4.0/10 | 3.0/10 |
| Space & placement | 6.0/10 | 3.0/10 |
| Light & reflections | 4.0/10 | 3.0/10 |
| Purposeful detail | 6.5/10 | 4.0/10 |
| Artistry & character | 6.5/10 | 3.0/10 |
| Materials & effects | 5.0/10 | 3.0/10 |
| Visual integrity | 5.5/10 | 2.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.