Claude Sonnet 5.5 59.6/100Rank 11/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Claude Sonnet 5.5 leads MiMo-V2.6-Pro by 22.3 points on StealthMark, 70.2 to 47.9. It leads on all 9 benchmarks. Claude Sonnet 5.5 scores higher on Ground Truth.
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
Claude Sonnet 5.5 scores higher on StealthMark and runs 2.2× faster in our speed test. MiMo-V2.6-Pro is 11× cheaper per output token. Both take about 1M tokens of context.
Full datasheets, every price and sourceClaude Sonnet 5.5 ↗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 ↗


Claude Sonnet 5.5
The near-field silhouettes, broad perspective and paint contact order are recognizable. Missing outer chains, truncated repetitions and absent ordered imagery within the main and reflected spheres substantially limit the reflection system. Sparse spherical highlights leave much of the curved room and emitter mapping unsupported, despite some plausible planar light sequences.
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 | Claude Sonnet 5.5 | 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.


Claude Sonnet 5.5
The centered coral squid has a friendly, composed expression and a balanced flower-like silhouette. Eight thick arms and two slender tentacles remain visibly connected, with no inverted parts. The mantle is elongated rather than compact, and the arm spacing is uneven. Soft shading gives volume, but dense stippling weakens the requested smooth matte finish; the broad background halo makes depth less precise.
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 | Claude Sonnet 5.5 | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 8.0/10 | 6.5/10 |
| Anatomy & construction | 8.0/10 | 5.0/10 |
| Space & placement | 8.0/10 | 5.5/10 |
| Light & reflections | 7.5/10 | 6.5/10 |
| Purposeful detail | 8.0/10 | 6.5/10 |
| Artistry & character | 8.0/10 | 5.0/10 |
| Materials & effects | 8.0/10 | 6.5/10 |
| Visual integrity | 8.5/10 | 6.0/10 |
Claude Sonnet 5.5
A coral squid with spreading arms tests connected anatomy, balanced composition and soft surface shading.
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.


Claude Sonnet 5.5
The crossed hands, dark dress, restrained smile and winding landscape clearly recall the Mona Lisa. Replication is limited by the frontal symmetry, wide eyes, elongated neck and flattened fingers. Soft facial shading provides volume, but heavy darkness and pervasive crackle obscure forms. The composition is coherent; the landscape and fabric remain visibly schematic.
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 | Claude Sonnet 5.5 | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 6.5/10 | 3.5/10 |
| Anatomy & construction | 5.0/10 | 3.5/10 |
| Space & placement | 6.0/10 | 4.0/10 |
| Light & reflections | 6.5/10 | 5.0/10 |
| Purposeful detail | 6.0/10 | 3.0/10 |
| Artistry & character | 6.5/10 | 4.0/10 |
| Materials & effects | 6.0/10 | 4.0/10 |
| Visual integrity | 6.5/10 | 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.


Claude Sonnet 5.5
A richly designed beach illustration combines radiant sunset bands, intricate palm fans and playful silhouettes within a cohesive purple, coral and turquoise palette. Carefully varied accessories reward close inspection, while overlapping foreground forms and shoreline layers organize the abundant activity. Dense palm strokes compete with focal subjects; animal anatomy, relative scales and reflected silhouettes remain simplified.
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 | Claude Sonnet 5.5 | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 9.0/10 | 8.5/10 |
| Anatomy & construction | 8.0/10 | 5.0/10 |
| Space & placement | 8.5/10 | 6.0/10 |
| Light & reflections | 8.5/10 | 6.5/10 |
| Purposeful detail | 9.5/10 | 6.5/10 |
| Artistry & character | 9.5/10 | 5.0/10 |
| Materials & effects | 8.5/10 | 6.0/10 |
| Visual integrity | 8.0/10 | 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.


Claude Sonnet 5.5
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.


Claude Sonnet 5.5
The raccoon clearly rides on the dog's back while the dog grips the jet ski controls. Expressive faces, vivid colors and a sweeping wake make the scene appealing. Visible limbs connect coherently, but overlapping steering paws and an indistinct control mounting weaken construction. Flat character lighting and simplified water limit depth and material realism.
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 | Claude Sonnet 5.5 | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 8.5/10 | 7.0/10 |
| Anatomy & construction | 7.0/10 | 5.0/10 |
| Space & placement | 8.0/10 | 5.5/10 |
| Light & reflections | 6.5/10 | 5.5/10 |
| Purposeful detail | 8.0/10 | 6.0/10 |
| Artistry & character | 7.0/10 | 4.0/10 |
| Materials & effects | 7.5/10 | 5.5/10 |
| Visual integrity | 8.0/10 | 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.


Claude Sonnet 5.5
The pelican is immediately recognizable, with an expressive face, generous bill and appealing cycling pose. Spokes, chain, feathers and scarf provide purposeful detail. The bicycle largely holds together, though overlapping angular legs obscure the far foot’s pedal contact. Clean outlines and balanced composition succeed; flat surfaces and limited directional lighting constrain depth.
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 | Claude Sonnet 5.5 | MiMo-V2.6-Pro |
|---|---|---|
| Task & likeness | 9.0/10 | 6.5/10 |
| Anatomy & construction | 7.5/10 | 5.0/10 |
| Space & placement | 7.5/10 | 6.0/10 |
| Light & reflections | 6.5/10 | 5.5/10 |
| Purposeful detail | 8.0/10 | 6.0/10 |
| Artistry & character | 7.5/10 | 6.0/10 |
| Materials & effects | 6.5/10 | 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.