GPT-6.1 Sol 62.0/100Rank 9/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Sol leads MiMo-V2.6-Pro by 19.9 points on StealthMark, 67.8 to 47.9. It leads on all 9 benchmarks. GPT-6.1 Sol scores higher on Newton's Mirror, with its largest category advantage in reflections.
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
GPT-6.1 Sol scores higher on StealthMark. MiMo-V2.6-Pro is 11× cheaper per output token and runs 2.3× faster in our speed test. Both take about 1.05M tokens of context.
Full datasheets, every price and sourceGPT-6.1 Sol ↗MiMo-V2.6-Pro ↗
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.
MiMo-V2.6-Pro
The main framing and visible paint-contact story are well supported. Major optical omissions dominate the result: sparse repetitions, undersized first images, missing outer chains and absent curved nested imagery prevent a coherent mirror-room system. The metallic forms remain convincing in volume but have a soft illustrative finish.
| Category | GPT-6.1 Sol | MiMo-V2.6-Pro |
|---|---|---|
| State at 600 ms | 24.0/25 | 23.0/25 |
| Camera and placement | 15.0/15 | 12.0/15 |
| Reflections | 35.0/120 | 19.0/120 |
| Materials and scale | 10.0/10 | 7.5/10 |
| 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 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.
MiMo-V2.6-Pro
An appealing rabbit with balanced framing, expressive eyes and purposeful costume accents. Simple frontal construction limits anatomical and spatial accomplishment. The orange orb provides an effective luminous focal point, but unreadable wrist connections weaken the requested gestures and prevent stronger integrity credit.
| Category | GPT-6.1 Sol | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 8.5/10 | 6.5/10 |
| Anatomy & construction | 7.5/10 | 5.0/10 |
| Space & placement | 8.0/10 | 5.5/10 |
| Light & reflections | 7.0/10 | 6.5/10 |
| Purposeful detail | 7.5/10 | 6.5/10 |
| Artistry & character | 7.5/10 | 5.0/10 |
| Materials & effects | 7.0/10 | 6.5/10 |
| Visual integrity | 8.0/10 | 6.0/10 |
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.
MiMo-V2.6-Pro
A small rabbit in an explorer outfit floats with a luminous orb. The scene tests character anatomy, pose and the placement of geometric forms around it.
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.
MiMo-V2.6-Pro
The portrait is recognizable through its dark silhouette, slight smile and muted landscape, but replication is weak. A frontal, oversized head and symmetric torso replace the reference's turned seated pose; angular, separated hands omit its central gesture. Smooth shading maintains coherence while anatomical detail, depth and material rendering remain basic.
| Category | GPT-6.1 Sol | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 6.5/10 | 3.5/10 |
| Anatomy & construction | 5.5/10 | 3.5/10 |
| Space & placement | 6.5/10 | 4.0/10 |
| Light & reflections | 6.5/10 | 5.0/10 |
| Purposeful detail | 5.5/10 | 3.0/10 |
| Artistry & character | 6.5/10 | 4.0/10 |
| Materials & effects | 6.0/10 | 4.0/10 |
| Visual integrity | 7.0/10 | 6.0/10 |
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 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.
MiMo-V2.6-Pro
A readable sunset beach with clear requested subjects, appealing framing and purposeful accessories. Schematic anatomy, flattened foreground objects, repetitive water highlights and sparse directional shadows limit construction and physical depth. The kite's unresolved anchor also constrains integrity.
| Category | GPT-6.1 Sol | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 8.5/10 | 8.5/10 |
| Anatomy & construction | 7.5/10 | 5.0/10 |
| Space & placement | 7.5/10 | 6.0/10 |
| Light & reflections | 7.5/10 | 6.5/10 |
| Purposeful detail | 7.5/10 | 6.5/10 |
| Artistry & character | 7.0/10 | 5.0/10 |
| Materials & effects | 7.0/10 | 6.0/10 |
| Visual integrity | 8.5/10 | 6.0/10 |
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.
MiMo-V2.6-Pro
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.
MiMo-V2.6-Pro
A coherent, cheerful cartoon with recognizable animals, readable steering contact and useful small details. The dog's orientation follows the craft more successfully than a wholly frontal pose would. Simple anatomy, weak raccoon grip and compressed seating contacts still limit physical credibility. Gradients and spray provide polish without resolving complex construction.
| Category | GPT-6.1 Sol | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 8.5/10 | 7.0/10 |
| Anatomy & construction | 7.5/10 | 5.0/10 |
| Space & placement | 7.5/10 | 5.5/10 |
| Light & reflections | 6.5/10 | 5.5/10 |
| Purposeful detail | 8.0/10 | 6.0/10 |
| Artistry & character | 8.0/10 | 4.0/10 |
| Materials & effects | 7.5/10 | 5.5/10 |
| Visual integrity | 8.5/10 | 4.5/10 |
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.
MiMo-V2.6-Pro
The distinctive bill, continuous silhouette and detailed wheels establish a readable pelican cyclist. Shaped feathers and soft shading add character, but jointless legs, crowded pedal contacts, absent steering contact and loosely directional lighting limit the construction. The comparisons support retaining the baseline category scores.
| Category | GPT-6.1 Sol | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 9.0/10 | 6.5/10 |
| Anatomy & construction | 7.0/10 | 5.0/10 |
| Space & placement | 8.0/10 | 6.0/10 |
| Light & reflections | 7.0/10 | 5.5/10 |
| Purposeful detail | 8.0/10 | 6.0/10 |
| Artistry & character | 8.5/10 | 6.0/10 |
| Materials & effects | 7.5/10 | 5.5/10 |
| Visual integrity | 8.0/10 | 6.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.