STEALTHMARK · HEAD TO HEAD

All comparisons ↗

DeepSeek-V4.1-Flash-1017 vs Mistral Large 4

DeepSeek-V4.1-Flash-1017 leads Mistral Large 4 by 15.9 points on StealthMark, 59.2 to 43.3. It leads on 8 of 9 benchmarks, including both games, and Mistral Large 4 on 1. DeepSeek-V4.1-Flash-1017 scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

59.2/100Overall rank 9/53
43.3/100Overall rank 31/53

General Intelligence

56.8/100
34.4/100

Visual Intelligence

63.5/100
58.0/100

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

BENCHMARK BY BENCHMARK

Where each model leads

  • DeepSeek-V4.1-Flash-1017
  • Mistral Large 4
  • Other models
  • Median

DATASHEET

Specs and pricing

DeepSeek-V4.1-Flash-1017 scores higher on StealthMark, is 3.5× cheaper per output token and runs 2.1× faster in our speed test. Both take about 1M tokens of context.

  • DeepSeek-V4.1-Flash-1017
  • Mistral Large 4
  • Other models
  • Median
PricePer 1M output tokens, input below
DeepSeek-V4.1-Flash-1017: $1.203.5× cheaper$0.30 inputMistral Large 4: $4.18$1.36 input
Context windowTokens per request, max output below
DeepSeek-V4.1-Flash-1017: 1MTied384K max outputMistral Large 4: 1MTied256K max output
Output speedTokens per second, our measurement
DeepSeek-V4.1-Flash-1017: 3102.1× fastertokens/sMistral Large 4: 151tokens/s
SizeTotal and active parameters
DeepSeek-V4.1-Flash-1017: 763B16B activeEstimatedMistral Large 4: 1.05T49B active
Developer
DeepSeek-AIMistral AI
Released
17 Oct 20266 Oct 2026
Origin
ChinaFrance
Input → output
Text, image → textBoth
Architecture
Sparse mixture-of-experts with a causal encoder-decoder design and native image understanding.Granular mixture of experts (MoE); multimodal text and image input, text output.

Full datasheets, every price and sourceDeepSeek-V4.1-Flash-1017 ↗Mistral Large 4 ↗

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-1017 52.9/100Rank 15/47

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

Mistral Large 4 22.0/100Rank 39/47

Survived 0 of 3
Foresight: complete playing field
Level 34 ptsTurn 8 / 20

Points per level

LevelDeepSeek-V4.1-Flash-1017Mistral Large 4
Level 1Second Thoughts
26 ptsSurvived
1 ptsOut of lives
Level 2Pressure Pot
7 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
10 ptsOut of lives
4 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-1017 73.9/100Rank 13/48

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

Mistral Large 4 49.4/100Rank 23/48

Cleared 5 of 5
Latch: complete playing field
Level 519.8 ptsTurn 31 / 40

Points per level

LevelDeepSeek-V4.1-Flash-1017Mistral Large 4
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.6 ptsCleared
Level 3Relay vault
19.2 ptsCleared
15.8 ptsClearedFinished early · 3 beacons left
Level 4Passing bay
16.4 ptsClearedFinished early · 3 beacons left
16.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20 ptsCleared
19.8 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.

Mistral Large 4

The central sphere, airborne black and deformed crimson support substantial state and placement credit. Recent cyan contact and crimson transport remain uncertain. Sparse wall patches and glossy gradients provide little evidence of the required extensive mirror system, while the missing centerline lamp and bulky crimson remain visible weaknesses.

Score breakdown

CategoryDeepSeek-V4.1-Flash-1017Mistral Large 4
State at 600 ms23.0/2517.0/25
Camera and placement13.5/1511.0/15
Reflections34.0/12012.0/120
Materials and scale8.5/105.5/10
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

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.

Mistral Large 4

An appealing, coherent illustration whose enormous rounded cat anchors the windblown composition. Warm shading and floating sketches communicate the brief well. Simplified paws, faint ear construction, inconsistent wind cues and limited material texture keep the execution below exceptional.

Score breakdown

CategoryDeepSeek-V4.1-Flash-1017Mistral Large 4
Task & likeness7.5/108.0/10
Anatomy & construction7.5/107.0/10
Space & placement8.0/107.5/10
Light & reflections7.0/107.0/10
Purposeful detail7.5/107.0/10
Artistry & character8.0/107.0/10
Materials & effects7.5/107.0/10
Visual integrity6.5/108.0/10

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.

Mistral Large 4

A heavy ginger cat stays planted on a terrace as wind carries papers around it. The scene tests weight, expression and the contrast between stable and moving forms.

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.

Mistral Large 4

A recognizable, cleanly rendered interpretation with a restrained palette and some facial modeling. Its enlarged frontal head, simplified expression, compressed low hands and schematic landscape substantially limit likeness and construction. The smooth rendering does not reproduce the painting's nuanced anatomy, clothing or atmospheric depth.

Score breakdown

CategoryDeepSeek-V4.1-Flash-1017Mistral Large 4
Task & likeness5.0/104.0/10
Anatomy & construction5.0/103.5/10
Space & placement6.0/105.0/10
Light & reflections6.0/104.5/10
Purposeful detail5.5/104.0/10
Artistry & character5.5/104.0/10
Materials & effects5.5/104.5/10
Visual integrity6.0/105.5/10

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.

Mistral Large 4

A clean, appealing beach illustration with clear subject coverage, a cohesive sunset palette and expressive animal details. Bodies and accessories resolve basic construction coherently, although joints remain schematic. Layered shapes establish modest depth; generic oval shadows and flat surfaces limit physical richness. Repeated forms and sparse articulation leave room for more accomplished drawing.

Score breakdown

CategoryDeepSeek-V4.1-Flash-1017Mistral Large 4
Task & likeness7.0/107.5/10
Anatomy & construction5.5/106.0/10
Space & placement5.5/107.0/10
Light & reflections6.0/106.5/10
Purposeful detail6.5/106.0/10
Artistry & character5.0/106.0/10
Materials & effects5.5/106.5/10
Visual integrity4.5/108.0/10

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.

Mistral Large 4

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.

Mistral Large 4

The central interaction is clear, with recognizable animals, expressive faces and a coherent sunset composition. Clean contours and readable accessories give the cartoon polish. Simplified joints, uncertain steering attachment, shallow hull volume and limited directional lighting constrain its physical resolution.

Score breakdown

CategoryDeepSeek-V4.1-Flash-1017Mistral Large 4
Task & likeness8.0/108.5/10
Anatomy & construction7.0/106.5/10
Space & placement7.0/107.0/10
Light & reflections6.5/105.5/10
Purposeful detail7.0/107.5/10
Artistry & character7.0/106.5/10
Materials & effects6.5/106.5/10
Visual integrity8.0/108.0/10

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

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.

Mistral Large 4

A coherent, appealing pelican illustration with a continuous body silhouette, readable bicycle and grounded wheels. Simplified legs and ambiguous steering and pedal connections limit construction. Clean shapes and expressive accessories succeed, while shallow depth, modest lighting and sparse material differentiation leave substantial room for refinement.

Score breakdown

CategoryDeepSeek-V4.1-Flash-1017Mistral Large 4
Task & likeness8.5/108.5/10
Anatomy & construction7.0/106.0/10
Space & placement7.5/107.0/10
Light & reflections6.5/106.5/10
Purposeful detail7.5/107.0/10
Artistry & character7.0/107.0/10
Materials & effects7.0/106.5/10
Visual integrity7.5/108.0/10

Benchmark task

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