STEALTHMARK · HEAD TO HEAD

All comparisons ↗

DeepSeek V4.1 Flash 1017 vs GPT 5.6 Sol

DeepSeek V4.1 Flash 1017 leads GPT 5.6 Sol by 4.1 points on StealthMark, 59.5 to 55.4. It leads on 6 of 9 benchmarks and GPT 5.6 Sol on 3, including both games. DeepSeek V4.1 Flash 1017 scores higher on Newton's Mirror, with its largest category advantage in reflections.

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All results ↗
All results ↗

Overall StealthMark

59.5/100Overall rank 9/50
55.4/100Overall rank 11/50

General Intelligence

56.9/100
52.0/100

Visual Intelligence

64.1/100
61.7/100

BENCHMARK BY BENCHMARK

Where each model leads

  • DeepSeek V4.1 Flash 1017
  • GPT 5.6 Sol
  • Other models
  • Median

Planning and learning across maze levels. 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.

DeepSeek V4.1 Flash 101752.9/100Rank 13/43

Survived 1 of 3 levels
Foresight: complete playing field
Level 310 ptsTurn 15 / 20

GPT 5.6 Sol62.9/100Rank 8/43

Survived 1 of 3 levels
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

Points per level

LevelDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Level 1Second Thoughts
26 ptsSurvived
27 ptsSurvived
Level 2Pressure Pot
7 ptsOut of lives
10 ptsOut of lives
Level 3Hide or Flight
10 ptsOut of lives
11 ptsOut of lives

Cooperative planning across puzzle levels. 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.

DeepSeek V4.1 Flash 101773.9/100Rank 12/43

Cleared 5 of 5 levels
Latch: complete playing field
Level 520 ptsTurn 30 / 40

GPT 5.6 Sol83.6/100Rank 5/43

Cleared 5 of 5 levels
Latch: complete playing field
Level 520.6 ptsTurn 27 / 40

Points per level

LevelDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
10.2 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
19.2 ptsCleared
18.8 ptsCleared
Level 4Passing bay
16.4 ptsClearedFinished early · 3 beacons left
18.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20 ptsCleared
20.6 ptsCleared

Newton's Mirror

Same task instructions

Physics, perspective and recursive reflections, tested together. Explore the test ↗

The judgment

DeepSeek V4.1 Flash 1017

Principal sphere and airborne-black placements are supported, and diminishing bilateral chains provide limited optical structure. Missing nested imagery, incomplete outer chains, distorted first images and sparse emitter recurrence remain the dominant weaknesses. Oversized paint bodies and unresolved cyan contact impose separate limitations.

GPT 5.6 Sol

The central sphere and paint ordering are supported, but a frontal, centrally converging chamber replaces the required corner perspective. The first wall and floor images have incorrect placement and scale relationships. Sparse reflection cues remain, while continuous outer chains, open lateral sightlines, dense planar light sequences and curved nested spherical imagery are largely missing.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017GPT 5.6 Sol
State at 600 ms23.0/2524.0/25
Camera and placement13.5/156.0/15
Reflections34.0/12011.0/120
Materials and scale9.0/1010.0/10
Floor-damage reward0.0/100.0/10

Benchmark task

A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.

Selfie

Different task instructions

Visual construction and creative interpretation.

The judgment

DeepSeek V4.1 Flash 1017

An expressive, intricately drawn storybook scene with a complete flowing silhouette and differentiated glossy materials. The supported main lens and continuous shrimp body make the central interaction readable, but reciprocal eye lines, facial magnification and the smaller lens grip remain ambiguous. Bright granular fringes and crowded accessory lines limit the finish.

GPT 5.6 Sol

Six evenly spaced lobes, outward-facing heads and a clear central hexagon establish the requested knot. The ivory silhouette is controlled, but broad crossing bands resemble rigid strips, shading provides limited muscular volume, and repetitive scale lines extend across black loop openings. Small oval heads have readable eyes and mouths but limited anatomical character or moist surface detail.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Task & likeness7.5/107.5/10
Anatomy & construction7.5/106.5/10
Space & placement8.0/107.0/10
Light & reflections7.0/105.0/10
Purposeful detail7.5/106.0/10
Artistry & character8.0/106.5/10
Materials & effects7.5/104.5/10
Visual integrity6.5/106.0/10

Benchmark task

DeepSeek V4.1 Flash 1017

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.

GPT 5.6 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.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

DeepSeek V4.1 Flash 1017

A coherent graphic interpretation with controlled contours, modeled facial volume and purposeful portrait details. Replication remains limited by the frontal pose, enlarged face, altered expression and ambiguous crossed hands. Landscape layering provides depth, while schematic fabric, smooth surfaces and tonal bands constrain the finish.

GPT 5.6 Sol

The crossed hands, dark dress and winding landscape establish the Mona Lisa composition. Replication is limited by enlarged eyes, an elongated face and a more frontal pose. Broad gradients suggest volume, but outlined features and flattened, overlapping fingers weaken the portrait. The frame and restrained palette unify the image; visible grain adds texture without convincing painterly transitions.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Task & likeness5.0/104.5/10
Anatomy & construction5.0/104.0/10
Space & placement6.0/105.5/10
Light & reflections6.0/105.0/10
Purposeful detail5.5/105.0/10
Artistry & character5.5/104.5/10
Materials & effects5.5/105.5/10
Visual integrity6.0/106.5/10

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

Beach

Same task instructions

Creativity, perspective and visual beauty.

The judgment

DeepSeek V4.1 Flash 1017

A coherent, colorful beach illustration with controlled curves, clean layering and varied readable accessories. Castle details and small animal features strengthen its finish. Schematic airborne animals, uncertain board support, shallow architectural depth and decorative reflections limit physical coherence and drawing sophistication.

GPT 5.6 Sol

The purple-to-gold sunset, framing palms and varied beach activities create an appealing, coherent illustration. The sun’s reflection establishes a clear focal path. Figures and animals are recognizable but geometrically simplified; airborne dolphins lack convincing splashes, and the boat reflection is schematic. Clean silhouettes and playful details succeed more strongly than anatomical depth or material realism.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Task & likeness7.0/108.5/10
Anatomy & construction5.5/106.0/10
Space & placement5.5/107.0/10
Light & reflections6.0/106.5/10
Purposeful detail6.5/107.0/10
Artistry & character5.0/106.5/10
Materials & effects5.5/106.5/10
Visual integrity5.5/107.0/10

Benchmark task

A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.

Ground Truth

Same task instructions

Physical reasoning, light and visual reconstruction.

The judgment

DeepSeek V4.1 Flash 1017

This benchmark has not been assessed yet.

GPT 5.6 Sol

This benchmark has not been assessed yet.

Benchmark task

A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.

Raccoon

Different task instructions

Scene composition and interacting subjects.

The judgment

DeepSeek V4.1 Flash 1017

An appealing cartoon with recognizable riders, expressive faces and a cohesive twilight palette. Clean shapes support the composition, but ambiguous limb overlaps, weak seat contact and loosely resolved steering limit physical coherence. Lighting and water effects are decorative, with modest material differentiation and drawing complexity.

GPT 5.6 Sol

Expressive faces, bold silhouettes and layered waves make an appealing cartoon. The raccoon sits convincingly behind the dog's shoulders, and the dog's forward paw reaches the steering grip. Steering construction and seated support remain somewhat ambiguous. The glowing sunset lacks a corresponding warm reflection or consistent illumination on the riders.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Task & likeness8.0/107.0/10
Anatomy & construction7.0/106.0/10
Space & placement7.0/107.0/10
Light & reflections6.5/106.5/10
Purposeful detail7.0/107.5/10
Artistry & character7.0/106.0/10
Materials & effects6.5/107.0/10
Visual integrity8.0/106.5/10

Benchmark task

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.

Pelican

Same task instructions

Subject construction and spatial relationships.

The judgment

DeepSeek V4.1 Flash 1017

An expressive, controlled illustration with continuous body construction, substantial bicycle detail and effective landscape depth. Unclear foot-to-pedal and wing-to-handlebar contacts limit physical conviction and local readability. Purposeful detail and composition are stronger than directional lighting and material treatment.

GPT 5.6 Sol

The expressive pelican and balanced coastal composition remain appealing, but a sky-colored slit between the neck contours above the wing leaves the central anatomy incoherent. This visible construction and layering defect prevents a clean-integrity assessment. Clustered feet lack clear pedal contacts and the chain routing is schematic; lighting and water reflections remain graphic.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017GPT 5.6 Sol
Task & likeness8.5/109.0/10
Anatomy & construction7.0/104.5/10
Space & placement7.5/107.5/10
Light & reflections6.5/107.5/10
Purposeful detail7.5/108.0/10
Artistry & character7.0/107.5/10
Materials & effects7.0/107.0/10
Visual integrity7.5/104.5/10

Benchmark task

A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.