GPT-6.1 Sol 62.0/100Rank 9/49

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Sol leads Step 5 Preview by 28.8 points on StealthMark, 67.8 to 39.0. It leads on all 9 benchmarks. GPT-6.1 Sol 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 1.05M tokens of context.
Full datasheets, every price and sourceGPT-6.1 Sol ↗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 ↗


GPT-6.1 Sol
Recognizable first sphere images and several central planar lights provide limited geometric agreement. Missing outer chains, truncated panel sequences and simplified interiors across the main, side and floor spheres leave most of the recursive reflection structure unsupported.
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 | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| State at 600 ms | 24.0/25 | 20.0/25 |
| Camera and placement | 15.0/15 | 13.5/15 |
| Reflections | 35.0/120 | 20.0/120 |
| Materials and scale | 10.0/10 | 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.


GPT-6.1 Sol
Six outward-facing heads and evenly arranged loops make the pale interlocking knot immediately readable. Uniform widths, angular inner bends and fine scales preserve its ornamental geometry. The bodies feel more like textured tubes than living muscle: shading is subdued, crossing contact shadows are weak, and visible curved seams interrupt surface continuity. Small heads have readable eyes and jaws but limited anatomical depth.
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 | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.5/10 | 6.0/10 |
| Anatomy & construction | 7.5/10 | 4.5/10 |
| Space & placement | 8.0/10 | 5.0/10 |
| Light & reflections | 7.0/10 | 5.5/10 |
| Purposeful detail | 7.5/10 | 5.5/10 |
| Artistry & character | 7.5/10 | 5.0/10 |
| Materials & effects | 7.0/10 | 6.0/10 |
| Visual integrity | 8.0/10 | 5.0/10 |
GPT-6.1 Sol
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.
Step 5 Preview
Character scenes test expression, anatomy, materials and coherent visual construction.
Precise visual recall and portrait reconstruction.


GPT-6.1 Sol
The recognizable pose, dark clothing and misty landscape form a coherent portrait. Soft facial shading creates volume, but the broad face, outlined eyes and simplified smile limit likeness. Overlapping hands have flattened fingers and ambiguous separation. Angular landscape shapes and sparse fabric detail keep the execution competent rather than masterful.
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 | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| Task & likeness | 6.5/10 | 4.0/10 |
| Anatomy & construction | 5.5/10 | 4.0/10 |
| Space & placement | 6.5/10 | 4.0/10 |
| Light & reflections | 6.5/10 | 3.5/10 |
| Purposeful detail | 5.5/10 | 4.0/10 |
| Artistry & character | 6.5/10 | 4.0/10 |
| Materials & effects | 6.0/10 | 3.0/10 |
| Visual integrity | 7.0/10 | 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.


GPT-6.1 Sol
A cohesive sunset palette, sweeping shoreline and framing palm create an appealing beach illustration. Animals, birds, play and a prominent sun reflection fulfill the brief. Connected but schematic figures and simplified dolphin anatomy limit construction; stepped reflections and mostly flat surfaces limit lighting and material depth. Small beach accessories remain readable and edges are clean.
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 | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.5/10 | 4.0/10 |
| Anatomy & construction | 7.5/10 | 3.0/10 |
| Space & placement | 7.5/10 | 3.5/10 |
| Light & reflections | 7.5/10 | 3.5/10 |
| Purposeful detail | 7.5/10 | 3.0/10 |
| Artistry & character | 7.0/10 | 3.0/10 |
| Materials & effects | 7.0/10 | 3.5/10 |
| Visual integrity | 8.5/10 | 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 Sol
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.


GPT-6.1 Sol
The masked raccoon rides the dog's back, and the dog's forepaw meets a handlebar connected to the deck. Expressive faces, a striped tail and sweeping wake create an appealing composition. Overlapping bodies compress the seating and rear-leg anatomy; hull depth and sunset illumination remain schematic.
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 | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.5/10 | 4.0/10 |
| Anatomy & construction | 7.5/10 | 4.5/10 |
| Space & placement | 7.5/10 | 3.0/10 |
| Light & reflections | 6.5/10 | 3.5/10 |
| Purposeful detail | 8.0/10 | 4.0/10 |
| Artistry & character | 8.0/10 | 3.5/10 |
| Materials & effects | 7.5/10 | 3.0/10 |
| Visual integrity | 8.5/10 | 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.


GPT-6.1 Sol
A clearly recognizable pelican rides a well-composed bicycle through a warm coastal scene. The expressive bill, restrained palette and carefully drawn wheels give the illustration character. Leg-to-pedal connections are less convincing, especially the obscured far foot. Lighting provides gentle volume but little directional shadow. The small subtitle is clipped at the lower border.
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 | GPT-6.1 Sol | Step 5 Preview |
|---|---|---|
| Task & likeness | 9.0/10 | 3.0/10 |
| Anatomy & construction | 7.0/10 | 3.0/10 |
| Space & placement | 8.0/10 | 3.0/10 |
| Light & reflections | 7.0/10 | 3.0/10 |
| Purposeful detail | 8.0/10 | 4.0/10 |
| Artistry & character | 8.5/10 | 3.0/10 |
| Materials & effects | 7.5/10 | 3.0/10 |
| Visual integrity | 8.0/10 | 2.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.