STEALTHMARK · HEAD TO HEAD

All comparisons ↗

DeepSeek-V4.1-Flash vs Iceman Contributor

DeepSeek-V4.1-Flash leads Iceman Contributor by 30.8 points on StealthMark, 50.0 to 19.2. It leads on all 9 benchmarks. DeepSeek-V4.1-Flash 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

50.0/100Overall rank 16/53
19.2/100Overall rank 47/53

General Intelligence

48.5/100
11.7/100

Visual Intelligence

53.0/100
31.0/100

Reasoning efficiency

On every task, result quality and reasoning tokens are each compared with all measured models and weighed equally. Each dot is one model.

Single-step reasoning Result quality weighed against reasoning tokens on a single problem

Multi-step reasoning Result quality weighed against reasoning tokens across connected steps, as in agentic workflows

Open or local

Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • DeepSeek-V4.1-Flash
  • Iceman Contributor
  • Other models
  • Median

DATASHEET

Specs and pricing

DeepSeek-V4.1-Flash scores higher on StealthMark and runs 5.2× faster in our speed test.

  • DeepSeek-V4.1-Flash
  • Iceman Contributor
  • Other models
  • Median
PricePer 1M output tokens, input below
DeepSeek-V4.1-Flash: $1.13$0.28 inputIceman Contributor: No list price
Context windowTokens per request, max output below
DeepSeek-V4.1-Flash: 1M384K max outputIceman Contributor: Not published
Output speedTokens per second, our measurement
DeepSeek-V4.1-Flash: 2425.2× fastertokens/sIceman Contributor: 46tokens/s
SizeTotal and active parameters
DeepSeek-V4.1-Flash: 763B16B activeIceman Contributor: Not disclosed
Developer
DeepSeek-AINot published
Released
10 Sep 2026Not published
Origin
ChinaNot published
Input → output
Text, image → textNot published
Architecture
20-layer encoder + 20-layer decoder with CSA2, Single-Pass mHC, Engram n-gram memory and DSpark/MTPNot published

Full datasheets, every price and sourceDeepSeek-V4.1-Flash ↗

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.

DeepSeek-V4.1-Flash 55.4/100Rank 12/47

Survived 1 of 3
Foresight: complete playing field
Level 318 ptsTurn 20 / 20

Iceman Contributor 3.2/100Rank 47/47

Survived 0 of 3
Foresight: complete playing field
Level 31 ptsTurn 7 / 20

Points per level

LevelDeepSeek-V4.1-FlashIceman Contributor
Level 1Second Thoughts
16 ptsOut of lives
0 ptsOut of lives
Level 2Pressure Pot
7 ptsOut of lives
3 ptsOut of lives
Level 3Hide or Flight
18 ptsSurvived
1 ptsOut of lives

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.

DeepSeek-V4.1-Flash 65.2/100Rank 19/48

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

Iceman Contributor 3.6/100Rank 44/48

Cleared 1 of 5
Latch: complete playing field
Level 55 ptsTurn 25 / 40

Points per level

LevelDeepSeek-V4.1-FlashIceman Contributor
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9 ptsCleared
2.8 ptsFinished early
Level 3Relay vault
17.2 ptsClearedFinished early · 3 beacons left
2.2 ptsFinished early
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
4 ptsFinished early
Level 5Second thoughts
20.6 ptsCleared
5 ptsFinished early

Newton's Mirror

Same task instructions

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

The judgment

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.

Iceman Contributor

The image provides limited evidence through rounded volume, faint wall strips and floor echoes. Its main sphere is small and low, the paint beads do not establish the required interaction history, and most of the defining mirror structure is missing.

Score breakdown

CategoryDeepSeek-V4.1-FlashIceman Contributor
State at 600 ms23.5/250.5/25
Camera and placement13.5/152.5/15
Reflections30.0/1207.5/120
Materials and scale8.0/103.0/10
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

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.

Iceman Contributor

The crystal crown, cyan eyes and blue faceting communicate an icy fantasy character. Anatomical readability is substantially weaker: the ringed torso, crowded facial construction and fingerless appendages do not resolve the requested childlike crouch or pouncing gesture. Sparse surface detail and shallow shading further limit the result.

Score breakdown

CategoryDeepSeek-V4.1-FlashIceman Contributor
Task & likeness7.0/104.0/10
Anatomy & construction6.5/103.0/10
Space & placement6.5/104.0/10
Light & reflections6.0/104.5/10
Purposeful detail7.0/104.0/10
Artistry & character7.5/104.5/10
Materials & effects7.0/104.5/10
Visual integrity7.0/104.0/10

Benchmark task

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.

Iceman Contributor

Character scenes test expression, anatomy, materials and coherent visual construction.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

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.

Iceman Contributor

The portrait retains a dark silhouette against an earthy landscape, but replication is weak. The frontal body, elongated facial proportions and undifferentiated hands lose the reference's defining pose and likeness. Basic gradients and layered hills provide some coherence, with little anatomical or painterly detail.

Score breakdown

CategoryDeepSeek-V4.1-FlashIceman Contributor
Task & likeness3.5/101.5/10
Anatomy & construction3.0/101.5/10
Space & placement4.5/102.5/10
Light & reflections4.5/102.0/10
Purposeful detail3.0/102.0/10
Artistry & character4.0/102.0/10
Materials & effects3.0/102.0/10
Visual integrity5.5/103.0/10

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

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.

Iceman Contributor

A coherent sunset beach with recognizable animals, playful details and effective palm framing. Connected silhouettes and layered scenery support modest construction and placement credit. Jointless figures, limited foreshortening and an inadequately separated sun and reflection keep the execution basic despite its attractive color.

Score breakdown

CategoryDeepSeek-V4.1-FlashIceman Contributor
Task & likeness8.0/107.0/10
Anatomy & construction5.5/103.5/10
Space & placement6.5/106.0/10
Light & reflections6.5/104.0/10
Purposeful detail5.5/105.5/10
Artistry & character5.0/103.5/10
Materials & effects6.0/104.5/10
Visual integrity5.5/105.0/10

Benchmark task

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

Ground Truth

Different task instructions

Physical reasoning, light and visual reconstruction.

The judgment

DeepSeek-V4.1-Flash

This benchmark has not been assessed yet.

Iceman Contributor

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

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.

Iceman Contributor

The sunset palette and red hull establish an appealing setting, but the central interaction remains unresolved. Overlapping bodies obscure the dog, supported seating is unclear, and no readable paw-to-control grip demonstrates steering. Simple construction, weak environmental lighting and loosely described spray limit depth and finish.

Score breakdown

CategoryDeepSeek-V4.1-FlashIceman Contributor
Task & likeness5.0/102.0/10
Anatomy & construction4.0/103.0/10
Space & placement5.5/103.0/10
Light & reflections6.0/104.0/10
Purposeful detail3.5/103.5/10
Artistry & character4.0/102.5/10
Materials & effects5.0/104.0/10
Visual integrity6.0/102.5/10

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

Different task instructions

Subject construction and spatial relationships.

The judgment

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.

Iceman Contributor

A recognizable pelican and bicycle sit within an appealing sunset composition. Feather contours, bill shape and atmospheric colour provide character, but disconnected-looking leg origins, unclear pedal contact and unresolved steering weaken the central riding action. Consistent wheel alignment establishes a side view without resolving the rider's support.

Score breakdown

CategoryDeepSeek-V4.1-FlashIceman Contributor
Task & likeness8.5/104.0/10
Anatomy & construction7.0/103.5/10
Space & placement7.5/103.5/10
Light & reflections7.0/105.0/10
Purposeful detail6.5/104.5/10
Artistry & character8.0/103.5/10
Materials & effects7.0/104.0/10
Visual integrity8.0/103.0/10

Benchmark task

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