GPT-6.1 Terra Low 36.1/100Rank 26/51

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GLM-5.3-Flash leads GPT-6.1 Terra Low by 7.2 points on StealthMark, 48.5 to 41.3. It leads on 6 of 9 benchmarks, including Foresight, and GPT-6.1 Terra Low on 2, including Latch, with 1 tied. Ox Alpha scores higher on Ground Truth.
See the difference ↘BENCHMARK BY BENCHMARK
DATASHEET
Full datasheets, every price and sourceGLM-5.3-Flash ↗
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 ↗


GPT-6.1 Terra Low
Deformed colored paint and a separate airborne black body establish readable interaction history. Cyan has travelled too far, framing differs substantially, and the mirror system supplies only elementary bands and oval copies. Missing recursive geometry, nested spherical imagery and emitter mapping remain the dominant weaknesses.
GLM-5.3-Flash
The setup is recognizable, but the paint interaction remains poorly established and off-center. The first wall and floor images provide coherent placement, scale, silhouette and occlusion cues, with faint lower echoes. Missing receding chains, nested imagery and ordered emitter mappings leave the reflection system heavily simplified. Dull shading does not convincingly depict polished steel or mirrors.
| Category | GPT-6.1 Terra Low | GLM-5.3-Flash |
|---|---|---|
| State at 600 ms | 22.0/25 | 14.0/25 |
| Camera and placement | 4.0/15 | 9.0/15 |
| Reflections | 10.0/120 | 21.5/120 |
| Materials and scale | 6.0/10 | 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.


GPT-6.1 Terra Low
Six attached outward-facing heads, delicate scales and soft ivory shading establish an orderly decorative motif. Separate paddle-shaped bodies replace the required interlocking loops and leave no enclosed central hexagon. Surface detail provides interest, but repeated simple forms, schematic faces and limited anatomical modeling constrain the result.
GLM-5.3-Flash
The expressive emerald face, ivory horns, gold accents and fine veining closely match the brief. Rounded volumes and layered shading create an appealing mascot. Rear hoof placement is cramped, lighting is somewhat inconsistent, and conspicuous white patches behind the muzzle interrupt the finish. Surfaces remain visibly stylized rather than photographic.
| Category | GPT-6.1 Terra Low | GLM-5.3-Flash |
|---|---|---|
| Task & likeness | 4.0/10 | 8.5/10 |
| Anatomy & construction | 3.5/10 | 7.5/10 |
| Space & placement | 4.5/10 | 7.5/10 |
| Light & reflections | 5.5/10 | 8.0/10 |
| Purposeful detail | 5.5/10 | 7.5/10 |
| Artistry & character | 5.0/10 | 7.5/10 |
| Materials & effects | 5.5/10 | 7.5/10 |
| Visual integrity | 4.0/10 | 7.0/10 |
GPT-6.1 Terra Low
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.
GLM-5.3-Flash
A rounded jade bull raising a hoof tests anatomy, balance and the appearance of polished stone and metal.
Precise visual recall and portrait reconstruction.


GPT-6.1 Terra Low
A recognizable, coherent portrait with purposeful facial detail, warm local volume and layered scenery. The frontal pose, enlarged face, merged hands and shallow clothing construction substantially limit replication and drawing skill. The visible successes support retaining the current assessment.
GLM-5.3-Flash
The crossed arms, green dress and hazy landscape clearly evoke Mona Lisa. Replication is limited by the frontal pose, oversized eyes, elongated face and pronounced lips. Overlapping finger strips lack convincing knuckles and palm volume. The balanced framing and soft shading provide cohesion, but simplified anatomy, repetitive folds and blurred scenery keep the portrait basic.
| Category | GPT-6.1 Terra Low | GLM-5.3-Flash |
|---|---|---|
| Task & likeness | 5.0/10 | 4.5/10 |
| Anatomy & construction | 4.5/10 | 4.5/10 |
| Space & placement | 5.0/10 | 6.0/10 |
| Light & reflections | 6.0/10 | 6.0/10 |
| Purposeful detail | 5.0/10 | 5.0/10 |
| Artistry & character | 5.5/10 | 5.0/10 |
| Materials & effects | 5.0/10 | 5.5/10 |
| Visual integrity | 6.0/10 | 4.0/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


GPT-6.1 Terra Low
A coherent sunset scene demonstrates the beach, animals, birds and reflections. Flowing silhouettes, warm color transitions and intact attachments are its strongest properties. Simplified anatomy, the turtle's elevated viewing angle and symbolic surface effects constrain drawing complexity and physical depth.
GLM-5.3-Flash
Framing palms, a vivid sunset palette and balanced kite and umbrella create an appealing beach illustration. Layered water and shoreline give the scene depth, while aligned reflections reinforce the sunset. Small accessories add character and reward inspection. Figures and animals remain schematic, some overlaps are difficult to read, and simplified shadows and flat surfaces limit physical richness.
| Category | GPT-6.1 Terra Low | GLM-5.3-Flash |
|---|---|---|
| Task & likeness | 8.0/10 | 8.0/10 |
| Anatomy & construction | 5.5/10 | 7.0/10 |
| Space & placement | 5.5/10 | 8.0/10 |
| Light & reflections | 6.5/10 | 8.0/10 |
| Purposeful detail | 6.0/10 | 8.0/10 |
| Artistry & character | 5.0/10 | 8.5/10 |
| Materials & effects | 5.5/10 | 6.5/10 |
| Visual integrity | 7.5/10 | 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.


GPT-6.1 Terra Low
This benchmark has not been assessed yet.
GLM-5.3-Flash
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.


GPT-6.1 Terra Low
Recognizable animals, a coherent craft and sweeping wake make an appealing cartoon. Basic limb construction, weakly demonstrated raccoon seating and limited shared perspective constrain the scene. Small identifying details work well, while lighting and materials remain broadly graphic.
GLM-5.3-Flash
Recognizable animals, a supported riding pose and an energetic diagonal composition make the scene readable. Character details and spray strengthen its appeal. Simple limb construction, limited directional lighting and an unresolved steering connection constrain the drawing's physical precision and complexity.
| Category | GPT-6.1 Terra Low | GLM-5.3-Flash |
|---|---|---|
| Task & likeness | 6.5/10 | 7.0/10 |
| Anatomy & construction | 5.0/10 | 5.0/10 |
| Space & placement | 5.5/10 | 6.0/10 |
| Light & reflections | 4.5/10 | 5.0/10 |
| Purposeful detail | 6.0/10 | 6.5/10 |
| Artistry & character | 5.0/10 | 4.0/10 |
| Materials & effects | 5.0/10 | 6.0/10 |
| Visual integrity | 6.0/10 | 6.0/10 |
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.


GPT-6.1 Terra Low
A coherent coastal illustration with a distinctive pelican, controlled contours and clearly organised bicycle wheels. Visible saddle support and shaped neck and wing contours earn credit beyond basic geometric construction. Rubbery legs, unresolved pedal contacts and absent steering contact limit the riding action. Lighting and materials remain restrained and spatially shallow.
GLM-5.3-Flash
The pelican, bicycle and seaside setting form a clear, appealing illustration. Circular wheels, readable frame tubes and clean silhouettes support the action. The legs connect to the body, but the far foot's pedal contact and wing-to-handlebar junction are cramped. Simple shading, uniform wave marks and limited surface texture keep the rendering relatively flat.
| Category | GPT-6.1 Terra Low | GLM-5.3-Flash |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 5.5/10 | 7.5/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 5.5/10 | 6.5/10 |
| Purposeful detail | 6.5/10 | 7.0/10 |
| Artistry & character | 6.0/10 | 8.0/10 |
| Materials & effects | 6.0/10 | 6.5/10 |
| Visual integrity | 6.0/10 | 8.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.