Kimi K3 52.7/100Rank 16/49

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Kimi K3 leads Step 5 Preview by 11.6 points on StealthMark, 50.6 to 39.0. It leads on 8 of 9 benchmarks, including both games, and Step 5 Preview on 1. Kimi K3 scores higher on Beach, with its largest category advantage in artistry & character.
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 1M tokens of context.
Full datasheets, every price and sourceKimi K3 ↗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 ↗


Kimi K3
The room fills the complete portrait frame without visible borders or labels. The main sphere and airborne black are convincingly placed within the portrait frame. Paint ordering is supported, but its contact and transport history remains weakly expressed. Symmetric wall ghosts, inverted floor imagery and panel echoes establish a basic mirror system. Diffuse gradients dominate, with little ordered nested imagery or repeated emitter mapping on either planar or spherical surfaces. The wall images sit too low, and the floor image is unusually large and low.
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 | Kimi K3 | Step 5 Preview |
|---|---|---|
| State at 600 ms | 18.0/25 | 20.0/25 |
| Camera and placement | 8.0/15 | 13.5/15 |
| Reflections | 24.0/120 | 20.0/120 |
| Materials and scale | 6.5/10 | 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.


Kimi K3
The indigo creature and warm reflected counterpart create a balanced, contemplative composition. Equations, constellations and book emblems give the transformation meaning. Clean silhouettes and controlled glow support the scene, but minimally articulated legs, shallow spatial cues and smooth, generalized surfaces limit its anatomical and material richness.
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 | Kimi K3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 9.0/10 | 6.0/10 |
| Anatomy & construction | 7.0/10 | 4.5/10 |
| Space & placement | 8.0/10 | 5.0/10 |
| Light & reflections | 7.5/10 | 5.5/10 |
| Purposeful detail | 8.0/10 | 5.5/10 |
| Artistry & character | 8.5/10 | 5.0/10 |
| Materials & effects | 7.5/10 | 6.0/10 |
| Visual integrity | 8.0/10 | 5.0/10 |
Kimi K3
An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.
Step 5 Preview
Character scenes test expression, anatomy, materials and coherent visual construction.
Precise visual recall and portrait reconstruction.


Kimi K3
The centered portrait, dark veil, folded hands and misty landscape clearly evoke Mona Lisa. Replication is limited by the elongated neck, simplified facial proportions and oval hands with shallow finger marks. Soft shading gives some volume, but pervasive blur substitutes for controlled painterly transitions and precise detail.
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 | Kimi K3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 4.5/10 | 4.0/10 |
| Anatomy & construction | 3.5/10 | 4.0/10 |
| Space & placement | 4.5/10 | 4.0/10 |
| Light & reflections | 4.5/10 | 3.5/10 |
| Purposeful detail | 4.0/10 | 4.0/10 |
| Artistry & character | 4.5/10 | 4.0/10 |
| Materials & effects | 4.5/10 | 3.0/10 |
| Visual integrity | 5.0/10 | 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.


Kimi K3
A coordinated sunset palette, expressive silhouettes and varied small details create a lively, appealing beach illustration. The central sun and framing palm and umbrella organize the busy scene, with clean contours preserving readability. Bodies and people remain diagrammatic, depth is shallow, and inverted figure reflections cross matte-looking sand without convincing surface lighting. Materials and movement are mostly conveyed through flat shapes.
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 | Kimi K3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.5/10 | 4.0/10 |
| Anatomy & construction | 7.0/10 | 3.0/10 |
| Space & placement | 7.0/10 | 3.5/10 |
| Light & reflections | 6.5/10 | 3.5/10 |
| Purposeful detail | 8.5/10 | 3.0/10 |
| Artistry & character | 8.5/10 | 3.0/10 |
| Materials & effects | 6.5/10 | 3.5/10 |
| Visual integrity | 7.0/10 | 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.


Kimi K3
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.


Kimi K3
The raccoon rides on the dog's back, and the dog's paw meets a steering assembly connected to the red hull. Expressive faces, a warm sunset and sweeping spray create an appealing composition. Crowded body overlaps obscure some limb connections, and the raccoon's right ear appears slightly separated. Flat shading and stylized reflections limit volume and depth.
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 | Kimi K3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.0/10 | 4.0/10 |
| Anatomy & construction | 6.5/10 | 4.5/10 |
| Space & placement | 7.5/10 | 3.0/10 |
| Light & reflections | 7.0/10 | 3.5/10 |
| Purposeful detail | 7.5/10 | 4.0/10 |
| Artistry & character | 6.0/10 | 3.5/10 |
| Materials & effects | 7.5/10 | 3.0/10 |
| Visual integrity | 7.0/10 | 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.


Kimi K3
The pelican and bicycle are immediately recognizable, with an expressive bill, flowing scarf and cheerful composition. Both legs remain attached, but pedal connections and wing contact with the handlebar are weakly resolved. Wheel alignment and landscape layers are coherent. Clean outlines support the illustration, while flat surfaces and limited lighting keep it short of masterful execution.
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 | Kimi K3 | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.0/10 | 3.0/10 |
| Anatomy & construction | 6.5/10 | 3.0/10 |
| Space & placement | 7.5/10 | 3.0/10 |
| Light & reflections | 5.0/10 | 3.0/10 |
| Purposeful detail | 6.5/10 | 4.0/10 |
| Artistry & character | 6.0/10 | 3.0/10 |
| Materials & effects | 6.0/10 | 3.0/10 |
| Visual integrity | 6.5/10 | 2.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.