STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Qwen3.8-Max-0902 vs Qwen4-Max-Preview

Qwen3.8-Max-0902 leads Qwen4-Max-Preview by 3.6 points on StealthMark, 62.4 to 58.8. Qwen4-Max-Preview leads on 6 of 9 benchmarks and Qwen3.8-Max-0902 on 3, including both games. Qwen4-Max-Preview scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

62.4/100Overall rank 9/58
58.8/100Overall rank 12/58

General Intelligence

61.6/100
54.6/100

Visual Intelligence

63.9/100
66.3/100

Reasoning efficiency

How many reasoning tokens a model needs for the quality it delivers.

Single-step reasoning How much it reasons to understand a task

Multi-step reasoning How much it keeps reasoning as a task goes on

Cost efficiency

How much Performance you get for your money.

  • Qwen4-Max-PreviewNot measured

BENCHMARK BY BENCHMARK

Where each model leads

  • Qwen3.8-Max-0902
  • Qwen4-Max-Preview
  • Other models
  • Median

DATASHEET

Specs and pricing

Qwen3.8-Max-0902 scores higher on StealthMark and runs 15% faster in our speed test.

  • Qwen3.8-Max-0902
  • Qwen4-Max-Preview
  • Other models
  • Median
PricePer 1M output tokens, input below
Qwen3.8-Max-0902: $4.95$1.65 inputQwen4-Max-Preview: No list price
Context windowTokens per request, max output below
Qwen3.8-Max-0902: 1M128K max outputQwen4-Max-Preview: Not published
Output speedTokens per second, our measurement
Qwen3.8-Max-0902: 7615% fastertokens/sQwen4-Max-Preview: 66tokens/s
SizeTotal and active parameters
Qwen3.8-Max-0902: 2.4T95B activeEstimatedQwen4-Max-Preview: Not disclosed
Developer
Qwen / Alibaba CloudNot published
Released
2 Sep 2026Not published
Origin
ChinaNot published
Input → output
Text, image → textNot published
Architecture
Mixture-of-Experts; hosted version based on the open Qwen3.8-2.4T-A95BNot published

Full datasheets, every price and sourceQwen3.8-Max-0902 ↗

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.

Qwen3.8-Max-0902 72.4/100Rank 5/54

Survived 2 of 3
Foresight: complete playing field
Level 316 ptsTurn 20 / 20

Qwen4-Max-Preview 57.5/100Rank 14/54

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

Points per level

LevelQwen3.8-Max-0902Qwen4-Max-Preview
Level 1Second Thoughts
27 ptsSurvived
20 ptsSurvived
Level 2Pressure Pot
12 ptsOut of lives
12 ptsOut of lives
Level 3Hide or Flight
16 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.

Qwen3.8-Max-0902 82.6/100Rank 7/55

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

Qwen4-Max-Preview 67.3/100Rank 21/55

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

Points per level

LevelQwen3.8-Max-0902Qwen4-Max-Preview
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
8.8 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
19.2 ptsCleared
19.2 ptsCleared
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
17.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.6 ptsCleared
20.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Qwen3.8-Max-0902

The central sphere and differentiated cyan/crimson interaction are supported. The tiny highlighted object above the sphere provides partial airborne-black evidence. The few isolated sphere and panel images preserve limited optical relationships, but most of the repeating mirror-room structure is missing. Core score: 64.5/170; including the floor-damage reward: 64.5/180.

Qwen4-Max-Preview

The main placement, compact airborne black and contrasting cyan/crimson interaction states are largely supported. Recognizable first mirror images earn substantial local credit despite modest silhouette and overlap errors. Most of the defining mirror system remains missing, especially nested spherical imagery, outer chains and repeated emitter mapping. Crimson also extends slightly too far down the facing surface.

Score breakdown

CategoryQwen3.8-Max-0902Qwen4-Max-Preview
State at 600 ms23.0/2524.5/25
Camera and placement12.0/1514.0/15
Reflections29.0/12039.0/120
Materials and scale8.0/106.5/10
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

Qwen3.8-Max-0902

A coherent ornamental illustration with balanced framing, appealing color and legible magical accessories. The disconnected raised wrist, incorrect raised-arm side and palm orientation, bear-like facial proportions and shallow material modeling limit execution. Clean decoration and compact spatial balance remain strengths.

Qwen4-Max-Preview

A coherent celestial character with readable costume layers, controlled ornament and coordinated luminous accents. Simplified joints, shallow frontal space and limited material modeling constrain construction and drawing complexity. The raised palm's orientation remains only partially demonstrated.

Score breakdown

CategoryQwen3.8-Max-0902Qwen4-Max-Preview
Task & likeness7.5/108.5/10
Anatomy & construction6.5/107.5/10
Space & placement8.0/107.5/10
Light & reflections7.0/107.0/10
Purposeful detail7.5/108.0/10
Artistry & character7.0/107.5/10
Materials & effects7.5/106.5/10
Visual integrity5.5/107.5/10

Benchmark task

A floating capybara in ornate robes tests character anatomy, layered fabric and the placement of surrounding luminous forms.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Qwen3.8-Max-0902

A recognizable, cohesive Mona Lisa interpretation with readable landscape layers and a restrained expression. Continuous body construction and clean contours support readability, but broad hands, simplified drapery, frontal symmetry and limited facial volume keep the execution basic and uneven.

Qwen4-Max-Preview

A coherent, recognizable interpretation with developed facial shading and purposeful portrait details. The frontal, nearly symmetric body, inflated sleeves and unresolved hand articulation substantially limit replication and construction. Layered scenery supplies basic depth, while uniformly smooth surfaces and schematic folds constrain material character and drawing complexity.

Score breakdown

CategoryQwen3.8-Max-0902Qwen4-Max-Preview
Task & likeness4.5/104.5/10
Anatomy & construction3.5/105.5/10
Space & placement5.0/105.0/10
Light & reflections5.0/106.5/10
Purposeful detail5.0/106.0/10
Artistry & character5.0/105.5/10
Materials & effects3.5/105.0/10
Visual integrity5.0/105.5/10

Benchmark task

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

Beach

Same task instructions

Creativity, perspective and visual beauty.

The judgment

Qwen3.8-Max-0902

A strong stylized beach illustration with coherent sunset color, lively dolphin arcs and balanced activity. Clean contours, readable ground contact and an aligned reflection support the finish. Schematic anatomy, sparse small-subject features, flat materials and repetitive water highlights limit physical depth and refinement.

Qwen4-Max-Preview

A coherent sunset illustration with sweeping palms, recognizable wildlife and varied, readable beach details. Atmospheric layering and controlled contours strengthen its character. Basic animal anatomy, overhead-looking foreground creatures and schematic cast shadows limit construction and physical depth.

Score breakdown

CategoryQwen3.8-Max-0902Qwen4-Max-Preview
Task & likeness8.5/108.5/10
Anatomy & construction7.5/108.0/10
Space & placement7.5/106.5/10
Light & reflections8.0/107.5/10
Purposeful detail7.0/108.0/10
Artistry & character7.5/108.5/10
Materials & effects6.5/106.5/10
Visual integrity8.5/107.0/10

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

Qwen3.8-Max-0902

This benchmark has not been assessed yet.

Qwen4-Max-Preview

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

Same task instructions

Scene composition and interacting subjects.

The judgment

Qwen3.8-Max-0902

The riding arrangement and steering action are readable, supported by coherent visible attachments and useful character details. Clean shapes, strong color separation and clustered foam make the scene appealing and active. Stiff anatomy, crowded controls, limited directional lighting and simple surface treatments constrain sophistication.

Qwen4-Max-Preview

An expressive cartoon with purposeful accessory detail, readable steering and directional spray. The aligned sunset reflection adds physical coherence. Simplified joints and the frontal raccoon's uncertain seated support continue to limit anatomy, perspective and integrity.

Score breakdown

CategoryQwen3.8-Max-0902Qwen4-Max-Preview
Task & likeness8.0/108.0/10
Anatomy & construction7.0/107.5/10
Space & placement7.0/106.0/10
Light & reflections6.5/106.5/10
Purposeful detail7.0/108.0/10
Artistry & character6.5/106.5/10
Materials & effects6.0/107.0/10
Visual integrity7.5/106.0/10

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

Qwen3.8-Max-0902

An appealing graphic illustration with a recognizable pelican, readable bicycle and clean coastal composition. Steering contact and one connected pedal support the action. Ambiguous neck-to-torso construction, an unclear opposing pedal connection, shallow space and limited material and lighting effects constrain its execution.

Qwen4-Max-Preview

A detailed coastal illustration with readable seated support, steering and pedal contacts. Continuous anatomy, coherent bicycle construction and purposeful small features support its expressive composition. Simplified limb articulation, modest perspective depth and weakly directional ground shadows limit physical conviction.

Score breakdown

CategoryQwen3.8-Max-0902Qwen4-Max-Preview
Task & likeness8.5/108.5/10
Anatomy & construction6.5/108.0/10
Space & placement7.0/107.5/10
Light & reflections6.0/106.5/10
Purposeful detail7.5/108.0/10
Artistry & character7.5/107.5/10
Materials & effects6.0/107.0/10
Visual integrity8.0/108.0/10

Benchmark task

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