MiMo-V2.6-Pro 54.6/100Rank 13/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Callstack Apex leads MiMo-V2.6-Pro by 1.6 points on StealthMark, 49.5 to 47.9. It leads on 6 of the 8 benchmarks with results for both and MiMo-V2.6-Pro on 2, including Latch. MiMo-V2.6-Pro 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
MiMo-V2.6-Pro is 3.4× cheaper per output token and takes 4× more context. Callstack Apex scores higher on StealthMark and runs 2.2× faster in our speed test.
Full datasheets, every price and sourceMiMo-V2.6-Pro ↗Callstack Apex ↗
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 ↗


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.
Callstack Apex
The principal sphere placement and paint contact sequence are supported. Isolated sphere and panel images provide limited optical structure, but missing lateral chains and side-floor continuations prevent a coherent repeating mirror room. The main and reflected spheres lack ordered curved nested imagery, while sparse planar emitter images and incomplete spherical emitter mapping leave most of the reflection system unsupported.
| Category | MiMo-V2.6-Pro | Callstack Apex |
|---|---|---|
| State at 600 ms | 23.0/25 | 20.0/25 |
| Camera and placement | 12.0/15 | 13.0/15 |
| Reflections | 19.0/120 | 10.0/120 |
| Materials and scale | 7.5/10 | 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.


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.
Callstack Apex
The cheerful yellow bird, cream eyes, orange features and miniature teal console closely match the brief. Clean block edges, restrained colors and soft shadows create an appealing composition. The body reads more like a gridded disc than a fully cubic sphere, and the outlined left wing has limited volume. The right wing reaches the cyan block, though its grip is ambiguous.
| Category | MiMo-V2.6-Pro | Callstack Apex |
|---|---|---|
| Task & likeness | 6.5/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 7.0/10 |
| Space & placement | 5.5/10 | 7.5/10 |
| Light & reflections | 6.5/10 | 7.5/10 |
| Purposeful detail | 6.5/10 | 7.5/10 |
| Artistry & character | 5.0/10 | 7.0/10 |
| Materials & effects | 6.5/10 | 7.0/10 |
| Visual integrity | 6.0/10 | 7.5/10 |
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.
Callstack Apex
A rounded bird built from small cubes explores a miniature machine. The scene tests block construction, expressive proportions, contact and soft lighting.
Precise visual recall and portrait reconstruction.


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.
Callstack Apex
The framed portrait recalls Mona Lisa through dark hair, folded arms and a hazy landscape. Replication is limited by wide, staring eyes, an elongated neck and a downturned mouth. The overlapping hands lack convincing finger and wrist construction. Soft tonal shading suggests volume, but pervasive blur obscures clothing, landscape and anatomical detail.
| Category | MiMo-V2.6-Pro | Callstack Apex |
|---|---|---|
| Task & likeness | 3.5/10 | 3.5/10 |
| Anatomy & construction | 3.5/10 | 4.0/10 |
| Space & placement | 4.0/10 | 4.5/10 |
| Light & reflections | 5.0/10 | 6.0/10 |
| Purposeful detail | 3.0/10 | 4.5/10 |
| Artistry & character | 4.0/10 | 4.5/10 |
| Materials & effects | 4.0/10 | 5.5/10 |
| Visual integrity | 6.0/10 | 5.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


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.
Callstack Apex
A cohesive sunset beach illustration with lively wildlife, playful accents, and an appealing warm-to-purple palette. Palm framing and the aligned sun reflection organize the scene, while connected silhouettes keep the activities readable. Schematic joints, ambiguous dolphin junctions, loosely matched reflections, and repetitive surface marks limit construction, lighting coherence, and material depth.
| Category | MiMo-V2.6-Pro | Callstack Apex |
|---|---|---|
| Task & likeness | 8.5/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 4.5/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 6.5/10 | 5.5/10 |
| Purposeful detail | 6.5/10 | 7.5/10 |
| Artistry & character | 5.0/10 | 6.5/10 |
| Materials & effects | 6.0/10 | 7.0/10 |
| Visual integrity | 6.0/10 | 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.


MiMo-V2.6-Pro
This benchmark has not been assessed yet.
Callstack Apex
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.


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.
Callstack Apex
The raccoon clearly rides the dog's back, and the dog's paws reach the jet ski controls. Expressive faces, a sweeping tail and a strong sunset composition give the illustration character. Limbs remain connected, but the dog's foreleg joints and vehicle seating are loosely constructed. Angular splashes convey speed more successfully than convincing water displacement; lighting and reflections remain decorative.
| Category | MiMo-V2.6-Pro | Callstack Apex |
|---|---|---|
| Task & likeness | 7.0/10 | 9.0/10 |
| Anatomy & construction | 5.0/10 | 7.0/10 |
| Space & placement | 5.5/10 | 7.5/10 |
| Light & reflections | 5.5/10 | 7.0/10 |
| Purposeful detail | 6.0/10 | 8.5/10 |
| Artistry & character | 4.0/10 | 7.5/10 |
| Materials & effects | 5.5/10 | 7.0/10 |
| Visual integrity | 4.5/10 | 8.0/10 |
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.

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.
Callstack Apex
An appealing cartoon with a distinctive pelican, expressive eye, warm bill and carefully drawn bicycle wheels. The wing reaches the handlebar, but the feet do not clearly engage the pedals, weakening the riding mechanics. Layered hills create depth; limited ground shadows weaken contact. Clean curves and purposeful feather details give the illustration polish.
| Category | MiMo-V2.6-Pro | Callstack Apex |
|---|---|---|
| Task & likeness | 6.5/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 6.5/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 5.5/10 | 7.5/10 |
| Purposeful detail | 6.0/10 | 8.0/10 |
| Artistry & character | 6.0/10 | 8.0/10 |
| Materials & effects | 5.5/10 | 7.5/10 |
| Visual integrity | 6.0/10 | 8.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.