STEALTHMARK · HEAD TO HEAD

All comparisons ↗

DeepSeek-V4-Pro-0813 vs DeepSeek-V4.1-Flash-1017

DeepSeek-V4.1-Flash-1017 leads DeepSeek-V4-Pro-0813 by 17.4 points on StealthMark, 59.2 to 41.8. It leads on all 9 benchmarks. DeepSeek-V4.1-Flash-1017 scores higher on Mona Lisa, with its largest category advantage in anatomy & construction.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

41.8/100Overall rank 33/53
59.2/100Overall rank 9/53

General Intelligence

41.6/100
56.8/100

Visual Intelligence

42.3/100
63.5/100

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
Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • DeepSeek-V4-Pro-0813
  • DeepSeek-V4.1-Flash-1017
  • Other models
  • Median

DATASHEET

Specs and pricing

DeepSeek-V4.1-Flash-1017 scores higher on StealthMark, is 3.2× cheaper per output token and runs 2.3× faster in our speed test. Both take about 1M tokens of context.

  • DeepSeek-V4-Pro-0813
  • DeepSeek-V4.1-Flash-1017
  • Other models
  • Median
PricePer 1M output tokens, input below
DeepSeek-V4-Pro-0813: $3.82$1.27 inputDeepSeek-V4.1-Flash-1017: $1.203.2× cheaper$0.30 input
Context windowTokens per request, max output below
DeepSeek-V4-Pro-0813: 1MTied384K max outputDeepSeek-V4.1-Flash-1017: 1MTied384K max output
Output speedTokens per second, our measurement
DeepSeek-V4-Pro-0813: 137tokens/sDeepSeek-V4.1-Flash-1017: 3102.3× fastertokens/s
SizeTotal and active parameters
DeepSeek-V4-Pro-0813: 1.6T49B activeDeepSeek-V4.1-Flash-1017: 763B16B activeEstimated
Developer
DeepSeek-AIBoth
Released
13 Aug 202617 Oct 2026
Origin
ChinaBoth
Input → output
Text → textText, image → text
Architecture
Mixture-of-Experts with DeepSeek V4 architecture and DSpark speculative-decoding moduleSparse mixture-of-experts with a causal encoder-decoder design and native image understanding.

Full datasheets, every price and sourceDeepSeek-V4-Pro-0813 ↗DeepSeek-V4.1-Flash-1017 ↗

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-Pro-0813 42.7/100Rank 21/47

Survived 1 of 3
Foresight: complete playing field
Level 39 ptsTurn 20 / 20

DeepSeek-V4.1-Flash-1017 52.9/100Rank 15/47

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

Points per level

LevelDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Level 1Second Thoughts
14 ptsOut of lives
26 ptsSurvived
Level 2Pressure Pot
6 ptsOut of lives
7 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
10 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-Pro-0813 71.7/100Rank 15/48

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

DeepSeek-V4.1-Flash-1017 73.9/100Rank 13/48

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

Points per level

LevelDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
18.8 ptsCleared
19.2 ptsCleared
Level 4Passing bay
17.2 ptsClearedFinished early · 1 beacon left
16.4 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.6 ptsCleared
20 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

DeepSeek-V4-Pro-0813

The central sphere and gross paint state are coherent. Reduced circular side images and paired overhead quadrilaterals offer limited, spatially organized reflection cues, but the floor-sphere image, receding mirror-room structure, outer chains, nested imagery and curved emitter mappings are largely missing or invalid.

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.

Score breakdown

CategoryDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
State at 600 ms22.0/2523.0/25
Camera and placement15.0/1513.5/15
Reflections11.0/12034.0/120
Materials and scale8.0/108.5/10
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

Same task instructions

Visual construction and creative interpretation.

The judgment

DeepSeek-V4-Pro-0813

The whale’s warm eye, lavender assistant and tilted shell convey appealing character. However, the shrimp and reciprocal inspection are unresolved, the large bubble and upper tail are cropped, and the flipper’s grip is unclear. Broad competing color fields and conspicuous stepped edges weaken the flowing composition. Gradients suggest volume, but lighting and translucent materials remain uneven.

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.

Score breakdown

CategoryDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Task & likeness3.0/107.5/10
Anatomy & construction5.0/107.5/10
Space & placement4.0/108.0/10
Light & reflections5.5/107.0/10
Purposeful detail5.5/107.5/10
Artistry & character2.5/108.0/10
Materials & effects5.0/107.5/10
Visual integrity3.0/106.5/10

Benchmark task

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.

Mona Lisa

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

DeepSeek-V4-Pro-0813

Dark hair, a restrained smile and a hazy landscape make the reference recognizable. Severe construction problems dominate: oversized looping sleeves surround a background-colored opening, and the crossed hands lack coherent wrist and forearm connections. Rigid symmetry and elongated facial proportions weaken expression. Soft skin gradients and clean contours provide limited finish.

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.

Score breakdown

CategoryDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Task & likeness2.0/105.0/10
Anatomy & construction0.5/105.0/10
Space & placement2.0/106.0/10
Light & reflections2.0/106.0/10
Purposeful detail2.0/105.5/10
Artistry & character3.0/105.5/10
Materials & effects1.5/105.5/10
Visual integrity1.0/106.0/10

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-Pro-0813

The glowing sunset, framing palms and layered shoreline create a coherent beach scene with animals, birds and playful accessories. The airborne blue animal has unclear anatomy, while flat foliage, weak ground contact and broad oval reflections limit depth and finish. The image is appealing but visibly simplified.

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.

Score breakdown

CategoryDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Task & likeness6.5/107.0/10
Anatomy & construction4.0/105.5/10
Space & placement5.5/105.5/10
Light & reflections6.0/106.0/10
Purposeful detail3.5/106.5/10
Artistry & character4.0/105.0/10
Materials & effects6.0/105.5/10
Visual integrity5.0/104.5/10

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-Pro-0813

This benchmark has not been assessed yet.

DeepSeek-V4.1-Flash-1017

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-Pro-0813

The masked raccoon riding the steering dog is readily recognizable, with expressive faces and energetic diagonal movement. The oversized tail dominates the composition, limb connections are difficult to trace, and the jet ski has little structural depth. Blurred spray and a heavy oval shadow weaken water contact, while the glowing sun produces little corresponding illumination.

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.

Score breakdown

CategoryDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Task & likeness7.0/108.0/10
Anatomy & construction4.5/107.0/10
Space & placement6.0/107.0/10
Light & reflections4.5/106.5/10
Purposeful detail6.0/107.0/10
Artistry & character4.5/107.0/10
Materials & effects5.0/106.5/10
Visual integrity4.0/108.0/10

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

Same task instructions

Subject construction and spatial relationships.

The judgment

DeepSeek-V4-Pro-0813

A clearly recognizable pelican cycles through a balanced, expressive illustration. The sweeping bill, shaded plumage and carefully drawn wheels give it character. Mechanical construction is weaker: the chain loop sits below the crank, and foot-to-pedal and wing-to-handlebar contact are ambiguous. Smooth gradients provide volume, but the scene remains visibly stylized.

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.

Score breakdown

CategoryDeepSeek-V4-Pro-0813DeepSeek-V4.1-Flash-1017
Task & likeness8.0/108.5/10
Anatomy & construction5.0/107.0/10
Space & placement6.5/107.5/10
Light & reflections7.0/106.5/10
Purposeful detail7.0/107.5/10
Artistry & character5.5/107.0/10
Materials & effects7.0/107.0/10
Visual integrity5.0/107.5/10

Benchmark task

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