DeepSeek-V4.1-Flash 55.4/100Rank 12/49

STEALTHMARK · HEAD TO HEAD
All comparisons ↗DeepSeek-V4.1-Flash leads Step 5 Preview by 11.0 points on StealthMark, 50.0 to 39.0. It leads on 8 of 9 benchmarks, including both games, and Step 5 Preview on 1. DeepSeek-V4.1-Flash scores higher on Beach, with its largest category advantage in prompt & likeness.
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 sourceDeepSeek-V4.1-Flash ↗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 ↗


DeepSeek-V4.1-Flash
The first wall and floor images provide limited reflection geometry, but the room's mirror recurrence is substantially incomplete, particularly the outer-edge chains and lateral sightlines. The main sphere and its large reflected images lack ordered, curved room and virtual-sphere imagery. Repeated emitter mapping is missing from both planar mirrors and spherical surfaces.
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 | DeepSeek-V4.1-Flash | Step 5 Preview |
|---|---|---|
| State at 600 ms | 23.5/25 | 20.0/25 |
| Camera and placement | 13.5/15 | 13.5/15 |
| Reflections | 30.0/120 | 20.0/120 |
| Materials and scale | 8.0/10 | 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.


DeepSeek-V4.1-Flash
Expressive faces, cobalt coloring and a flowing diagonal composition make the mutual inspection charming. Execution is uneven: the long pointed flipper lacks a convincing grip, the enlarged shrimp face appears detached from its body, and the large lens is oval. Flat anatomical shading and an unexplained purple ringed patch beneath the whale weaken the requested polished 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 | DeepSeek-V4.1-Flash | Step 5 Preview |
|---|---|---|
| Task & likeness | 7.0/10 | 6.0/10 |
| Anatomy & construction | 6.5/10 | 4.5/10 |
| Space & placement | 6.5/10 | 5.0/10 |
| Light & reflections | 6.0/10 | 5.5/10 |
| Purposeful detail | 7.0/10 | 5.5/10 |
| Artistry & character | 7.5/10 | 5.0/10 |
| Materials & effects | 7.0/10 | 6.0/10 |
| Visual integrity | 7.0/10 | 5.0/10 |
DeepSeek-V4.1-Flash
A whale and a tiny shrimp examine one another through bubble lenses, with an octopus nearby. The scene tests interacting characters, differences in scale and transparent materials.
Step 5 Preview
Character scenes test expression, anatomy, materials and coherent visual construction.
Precise visual recall and portrait reconstruction.


DeepSeek-V4.1-Flash
The centered portrait, dark hair, crossed hands and muted landscape make the reference recognizable. Replication is limited by the frontal pose, staring eyes and weakly defined smile. Hands are overlapping oval masses with almost no finger articulation, while wrists disappear into sleeves. Soft gradients suggest volume, but broad, indistinct surfaces and faint stray lines leave the drawing basic and uneven.
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 | DeepSeek-V4.1-Flash | Step 5 Preview |
|---|---|---|
| Task & likeness | 3.5/10 | 4.0/10 |
| Anatomy & construction | 3.0/10 | 4.0/10 |
| Space & placement | 4.5/10 | 4.0/10 |
| Light & reflections | 4.5/10 | 3.5/10 |
| Purposeful detail | 3.0/10 | 4.0/10 |
| Artistry & character | 4.0/10 | 4.0/10 |
| Materials & effects | 3.0/10 | 3.0/10 |
| Visual integrity | 5.5/10 | 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.


DeepSeek-V4.1-Flash
The glowing sunset, silhouetted palm and playful foreground create a coherent, appealing beach illustration. Birds, crab, boat and reflections fulfill the brief. The airborne animals have weakly defined anatomy and little convincing splash interaction. Broad, blurred reflections and largely flat surfaces limit depth and finish.
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 | DeepSeek-V4.1-Flash | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.0/10 | 4.0/10 |
| Anatomy & construction | 5.5/10 | 3.0/10 |
| Space & placement | 6.5/10 | 3.5/10 |
| Light & reflections | 6.5/10 | 3.5/10 |
| Purposeful detail | 5.5/10 | 3.0/10 |
| Artistry & character | 5.0/10 | 3.0/10 |
| Materials & effects | 6.0/10 | 3.5/10 |
| Visual integrity | 5.5/10 | 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.


DeepSeek-V4.1-Flash
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.


DeepSeek-V4.1-Flash
The sunset palette and silhouetted grouping establish an appealing scene. A masked rider sits above a pointed-eared dog, but merged body shapes leave limbs and support unresolved. The boatlike craft lacks readable steering controls, so the requested action is unclear. Sparse facial marks and glowing spray dots offer limited detail.
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 | DeepSeek-V4.1-Flash | Step 5 Preview |
|---|---|---|
| Task & likeness | 5.0/10 | 4.0/10 |
| Anatomy & construction | 4.0/10 | 4.5/10 |
| Space & placement | 5.5/10 | 3.0/10 |
| Light & reflections | 6.0/10 | 3.5/10 |
| Purposeful detail | 3.5/10 | 4.0/10 |
| Artistry & character | 4.0/10 | 3.5/10 |
| Materials & effects | 5.0/10 | 3.0/10 |
| Visual integrity | 6.0/10 | 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.


DeepSeek-V4.1-Flash
A recognizable pelican rides a brightly colored bicycle against a striking sunset. The sweeping bill, trailing scarf and circular wheels create a controlled composition. Both legs connect, but pedal linkage, body support and the wing's handlebar grip remain loosely resolved. Clean vector shapes and feather details work well; simplified shading limits volume and integration with the sunset light.
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 | DeepSeek-V4.1-Flash | Step 5 Preview |
|---|---|---|
| Task & likeness | 8.5/10 | 3.0/10 |
| Anatomy & construction | 7.0/10 | 3.0/10 |
| Space & placement | 7.5/10 | 3.0/10 |
| Light & reflections | 7.0/10 | 3.0/10 |
| Purposeful detail | 6.5/10 | 4.0/10 |
| Artistry & character | 8.0/10 | 3.0/10 |
| Materials & effects | 7.0/10 | 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.