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

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Terra Low leads LongCat-2.0 by 15.8 points on StealthMark, 41.3 to 25.5. It leads on 5 of the 7 benchmarks with results for both and LongCat-2.0 on 2. GPT-6.1 Terra Low scores higher on Ground Truth.
See the difference ↘BENCHMARK BY BENCHMARK
DATASHEET
Full datasheets, every price and sourceLongCat-2.0 ↗
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.
LongCat-2.0
Cyan lies on the sphere's facing middle rather than showing its recent interaction near the apex. Separate airborne black and elongated crimson support part of the timing sequence. Small side images and an overlapping lower image provide limited reflection ordering, but recursive room structure, nested imagery and emitter mappings are largely absent. The main sphere is smaller and higher in the frame than prescribed, and the surfaces have a soft, matte appearance.
| Category | GPT-6.1 Terra Low | LongCat-2.0 |
|---|---|---|
| State at 600 ms | 22.0/25 | 9.5/25 |
| Camera and placement | 4.0/15 | 6.5/15 |
| Reflections | 10.0/120 | 12.5/120 |
| Materials and scale | 6.0/10 | 5.5/10 |
| 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.
LongCat-2.0
Amber slit eyes, a pointed beak, cream feathers and gold-trimmed black clothing establish the secretive owl rogue. The head appears frontal rather than lowered, with much of the face exposed. The centered silhouette is effective, but stiff cloak geometry, shallow facial modeling and extremely dark clothing limit depth and finish. Sparse gold markings suggest the requested circuitry only loosely.
| Category | GPT-6.1 Terra Low | LongCat-2.0 |
|---|---|---|
| Task & likeness | 4.0/10 | 7.0/10 |
| Anatomy & construction | 3.5/10 | 6.0/10 |
| Space & placement | 4.5/10 | 6.0/10 |
| Light & reflections | 5.5/10 | 5.5/10 |
| Purposeful detail | 5.5/10 | 6.0/10 |
| Artistry & character | 5.0/10 | 6.5/10 |
| Materials & effects | 5.5/10 | 5.5/10 |
| Visual integrity | 4.0/10 | 6.5/10 |
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.
LongCat-2.0
A cloaked owl with luminous eyes tests expression, fabric folds and the separation of dark forms.
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.
LongCat-2.0
The centered portrait, slight smile, overlapping hands and distant landscape suggest Mona Lisa, but replication is weak. The face has little volume, the shoulders and torso form a narrow wedge, and the hands are fingerless ovals with unresolved wrists. Broad gray background bands provide limited depth. A bright head rim and pale hands contrast with an almost featureless dark figure.
| Category | GPT-6.1 Terra Low | LongCat-2.0 |
|---|---|---|
| Task & likeness | 5.0/10 | 0.5/10 |
| Anatomy & construction | 4.5/10 | 0.5/10 |
| Space & placement | 5.0/10 | 0.5/10 |
| Light & reflections | 6.0/10 | 0.5/10 |
| Purposeful detail | 5.0/10 | 0.0/10 |
| Artistry & character | 5.5/10 | 0.5/10 |
| Materials & effects | 5.0/10 | 0.0/10 |
| Visual integrity | 6.0/10 | 0.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


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.
LongCat-2.0
The sunset, palms, birds and beach animals create a cheerful, readable scene. Clean silhouettes and a vivid sky establish the composition, but construction remains schematic. The right palm appears rooted in open water, shadows have limited connection to the sunset, and the sun’s reflection consists of rigid bands. Small creatures and beach equipment are recognizable but minimally developed.
| Category | GPT-6.1 Terra Low | LongCat-2.0 |
|---|---|---|
| Task & likeness | 8.0/10 | 7.5/10 |
| Anatomy & construction | 5.5/10 | 5.5/10 |
| Space & placement | 5.5/10 | 5.5/10 |
| Light & reflections | 6.5/10 | 6.0/10 |
| Purposeful detail | 6.0/10 | 5.0/10 |
| Artistry & character | 5.0/10 | 5.0/10 |
| Materials & effects | 5.5/10 | 3.0/10 |
| 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.


GPT-6.1 Terra Low
This benchmark has not been assessed yet.
LongCat-2.0
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.
LongCat-2.0
The raccoon is recognizable and expressive, with a clear mask and striped tail. The dog's anatomy is poorly resolved, and the flattened craft lacks convincing steering and seating. Feet extend below the hull, weakening the sense of support. An appealing palette, clean shapes and decorative water effects give the illustration some polish.
| Category | GPT-6.1 Terra Low | LongCat-2.0 |
|---|---|---|
| Task & likeness | 6.5/10 | 4.0/10 |
| Anatomy & construction | 5.0/10 | 3.0/10 |
| Space & placement | 5.5/10 | 4.5/10 |
| Light & reflections | 4.5/10 | 5.5/10 |
| Purposeful detail | 6.0/10 | 6.0/10 |
| Artistry & character | 5.0/10 | 3.0/10 |
| Materials & effects | 5.0/10 | 5.5/10 |
| Visual integrity | 6.0/10 | 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.


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.
LongCat-2.0
A clearly recognizable pelican cycles through a well-composed coastal sunset. Warm colors, flowing scarf, feather contours and bicycle details give the illustration character. The legs connect to the body, but the farther foot's pedal contact and the wing's handlebar grip remain ambiguous. Clean vector shapes provide polish, with limited material texture and directional shading.
| Category | GPT-6.1 Terra Low | LongCat-2.0 |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 5.5/10 | 7.0/10 |
| Space & placement | 6.0/10 | 8.0/10 |
| Light & reflections | 5.5/10 | 7.5/10 |
| Purposeful detail | 6.5/10 | 8.0/10 |
| Artistry & character | 6.0/10 | 8.5/10 |
| Materials & effects | 6.0/10 | 7.0/10 |
| Visual integrity | 6.0/10 | 8.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.