STEALTHMARK · HEAD TO HEAD

All comparisons ↗

DeepSeek V4.1 Flash 1017 vs Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM) leads DeepSeek V4.1 Flash 1017 by 3.3 points on StealthMark, 62.8 to 59.5. It leads on 6 of 9 benchmarks, including Foresight, and DeepSeek V4.1 Flash 1017 on 3, including Latch. Union Alpha scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.

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All results ↗
Model guide ↗

Overall StealthMark

59.5/100Overall rank 9/50
62.8/100Overall rank 7/50

General Intelligence

56.9/100
58.8/100

Visual Intelligence

64.1/100
69.9/100

BENCHMARK BY BENCHMARK

Where each model leads

  • DeepSeek V4.1 Flash 1017
  • Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
  • 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

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)78.7/100Rank 1/43

Survived 2 of 3 levels
Foresight: complete playing field
Level 319 ptsTurn 20 / 20

Points per level

LevelDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Level 1Second Thoughts
26 ptsSurvived
27 ptsSurvived
Level 2Pressure Pot
7 ptsOut of lives
12 ptsOut of lives
Level 3Hide or Flight
10 ptsOut of lives
19 ptsSurvived

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

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)36.5/100Rank 27/43

Cleared 4 of 5 levels
Latch: complete playing field
Level 519.4 ptsTurn 33 / 40

Points per level

LevelDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
19.2 ptsCleared
14.2 ptsClearedFinished early · 4 beacons left
Level 4Passing bay
16.4 ptsClearedFinished early · 3 beacons left
9.2 ptsFinished early
Level 5Second thoughts
20 ptsCleared
19.4 ptsCleared

Newton's Mirror

Same task instructions

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

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)52.5/100Rank 7/50

Union Alpha: Newton's Mirror SVG benchmark

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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

Recognizable near-field sphere placement and bilateral convergence provide limited optical structure. Broad gray regions interrupt lateral sightlines and truncate side-floor images. Missing outer chains, absent nested sphere imagery and incomplete planar and curved emitter mappings dominate the reflection system.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
State at 600 ms23.0/2525.0/25
Camera and placement13.5/1513.5/15
Reflections34.0/12034.5/120
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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)76.5/100Rank 7/50

Union Alpha: Selfie SVG benchmark

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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

A strong futuristic emblem with clear hierarchy, controlled negative space and distinctive typography. Silver and gunmetal layers give the sweeping ribbons convincing graphic depth, while red accents remain restrained. Ambiguous concealed connections and occasionally abrupt highlight bands limit the construction and material realism.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Task & likeness7.5/109.0/10
Anatomy & construction7.5/107.5/10
Space & placement8.0/108.5/10
Light & reflections7.0/107.5/10
Purposeful detail7.5/107.0/10
Artistry & character8.0/107.5/10
Materials & effects7.5/107.5/10
Visual integrity6.5/107.0/10

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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

An interwoven metallic emblem tests ribbon geometry, overlapping forms and the appearance of reflective metal against a dark background.

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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

The centered portrait, folded hands, dark clothing and hazy landscape clearly evoke the Mona Lisa. Muted colors and soft facial shading create a coherent illustration, but replication remains schematic: the face is broad, eyes outlined, smile simplified and overlapping fingers poorly resolved. Angular landscape shapes and flat fabric limit depth and painterly richness.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Task & likeness5.0/106.5/10
Anatomy & construction5.0/105.0/10
Space & placement6.0/106.5/10
Light & reflections6.0/106.0/10
Purposeful detail5.5/105.5/10
Artistry & character5.5/106.5/10
Materials & effects5.5/105.0/10
Visual integrity6.0/107.0/10

Benchmark task

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

Beach

Different 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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

A cohesive sunset palette, sweeping shoreline and playful animals make an appealing beach illustration. The sun’s reflection establishes a clear focal axis, balanced by the palm and umbrella. Clean silhouettes and small decorative features reward inspection, though simplified anatomy, repetitive reflection bars and generic oval shadows limit volume and naturalism.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Task & likeness7.0/109.0/10
Anatomy & construction5.5/107.0/10
Space & placement5.5/108.0/10
Light & reflections6.0/107.0/10
Purposeful detail6.5/107.0/10
Artistry & character5.0/106.0/10
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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)63.3/100Rank 8/50

Union Alpha: Ground Truth SVG benchmark

The judgment

DeepSeek V4.1 Flash 1017

This benchmark has not been assessed yet.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

Expressive animals, a readable riding arrangement and sweeping spray create an appealing cartoon. The raccoon sits convincingly on the dog's back, but the dog's paw does not clearly grip the handlebar, whose connection to the hull is unresolved. Flat lighting provides little volume or reflection. A dark rectangular strip interrupts the upper-right background.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Task & likeness8.0/108.0/10
Anatomy & construction7.0/106.5/10
Space & placement7.0/107.5/10
Light & reflections6.5/105.5/10
Purposeful detail7.0/107.5/10
Artistry & character7.0/107.5/10
Materials & effects6.5/107.5/10
Visual integrity8.0/107.0/10

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

Different 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.

Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)

The pelican is immediately recognizable, with an expressive face, convincing bill silhouette and appealing pastel composition. Both legs connect to feet, and the wing reaches the handlebar. Bicycle construction is less resolved: the far pedal lacks a clear crank connection and no chain is visible. Clean contours and orderly spokes support the illustration, while flat lighting and simplified surfaces limit depth.

Score breakdown

CategoryDeepSeek V4.1 Flash 1017Pareto 26.9 (Union of GPT-6 Astra + Deepseek + GLM)
Task & likeness8.5/108.5/10
Anatomy & construction7.0/106.5/10
Space & placement7.5/107.5/10
Light & reflections6.5/106.0/10
Purposeful detail7.5/106.5/10
Artistry & character7.0/106.5/10
Materials & effects7.0/106.5/10
Visual integrity7.5/108.5/10

Benchmark task

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