STEALTHMARK · THREE-MODEL COMPARISON

All comparisons ↗

Qwen3.8-27B vs Qwen3.6-27B vs Gemma 4 31B

Qwen3.8-27B leads on StealthMark with 51.7, ahead of Qwen3.6-27B (32.4) and Gemma 4 31B (29.5). Of the 9 benchmarks compared, Qwen3.8-27B leads on 9. Qwen3.8-27B leads both games.

Overall StealthMark

51.7/100Overall rank 16/55
32.4/100Overall rank 43/55
29.5/100Overall rank 45/55

General Intelligence

46.2/100
25.6/100
24.2/100

Visual Intelligence

61.4/100
43.9/100
38.1/100

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.

Open or local

Local modelOpen model · Apache-2.0
Local modelOpen model · Apache-2.0
Local modelOpen model · Apache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Qwen3.8-27B
  • Qwen3.6-27B
  • Gemma 4 31B
  • Other models
  • Median

DATASHEET

Specs and pricing

Qwen3.8-27B scores highest on StealthMark. Gemma 4 31B costs least per output token and runs fastest in our speed test.

  • Qwen3.8-27B
  • Qwen3.6-27B
  • Gemma 4 31B
  • Other models
  • Median
PricePer 1M output tokens, input below
Qwen3.8-27B: $1.70$0.42 inputQwen3.6-27B: $3.60$0.60 inputGemma 4 31B: $0.404.2× cheaper$0.14 input
Context windowTokens per request, max output below
Qwen3.8-27B: 1MTied128K max outputQwen3.6-27B: 1.01MTied64K max outputGemma 4 31B: 256K
Output speedTokens per second, our measurement
Qwen3.8-27B: 78tokens/sQwen3.6-27B: 96tokens/sGemma 4 31B: 11622% fastertokens/s
SizeTotal and active parameters
Qwen3.8-27B: 27BAll activeEstimatedQwen3.6-27B: 27BAll activeGemma 4 31B: 30.7BAll activeEstimated
Developer
QwenQwen / AlibabaGoogle DeepMind
Released
14 Aug 202622 Apr 20262 Apr 2026
Origin
ChinaChinaUnited States
Input → output
Text, image, video → textText, image, video → textText, image → text
Architecture
Dense causal language model with vision encoder; hybrid Gated DeltaNet and gated attention; MTP-trainedDense causal language model with vision encoder; hybrid Gated DeltaNet and gated attention; MTP-trainedDense multimodal transformer with interleaved sliding-window and global attention

Full datasheets, every price and sourceQwen3.8-27B ↗Qwen3.6-27B ↗Gemma 4 31B ↗

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.

Qwen3.8-27B 63.0/100Rank 7/51

Survived 1 of 3
Foresight: complete playing field
Level 311 ptsTurn 16 / 20

Qwen3.6-27B 37.8/100Rank 25/51

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

Gemma 4 31B 30.2/100Rank 31/51

Survived 0 of 3
Foresight: complete playing field
Level 38 ptsTurn 15 / 20

Points per level

LevelQwen3.8-27BQwen3.6-27BGemma 4 31B
Level 1Second Thoughts
26 ptsSurvived
9 ptsOut of lives
9 ptsOut of lives
Level 2Pressure Pot
12 ptsOut of lives
6 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
11 ptsOut of lives
9 ptsSurvived
8 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.

Qwen3.8-27B 38.6/100Rank 32/52

Cleared 2 of 5
Latch: complete playing field
Level 515.8 ptsTurn 31 / 40

Qwen3.6-27B 28.5/100Rank 39/52

Cleared 3 of 5
Latch: complete playing field
Level 511 ptsTurn 25 / 40

Gemma 4 31B 26.6/100Rank 43/524 of 5 levels

4 of 5 played
Latch: complete playing field
Level 42.2 ptsTurn 39 / 40

Points per level

LevelQwen3.8-27BQwen3.6-27BGemma 4 31B
Level 1Hold the door
5.2 ptsCleared
4.8 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
8.8 ptsClearedFinished early · 1 beacon left
9 ptsCleared
Level 3Relay vault
11.2 ptsFinished early
16.4 ptsClearedFinished early · 3 beacons left
13.2 ptsFinished early
Level 4Passing bay
13.2 ptsFinished early
13.4 ptsFinished early
2.2 ptsFinished early
Level 5Second thoughts
15.8 ptsFinished early
11 ptsFinished early
Not played

Newton's Mirror

Same task instructions

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

The judgment

Qwen3.8-27B

The room fills the complete 16:9 frame without visible borders or labels. Central placement fits the wider frame, and the paint colors follow the expected vertical order. Bilateral side images, diminishing echoes and an overlapping floor image provide limited mirror depth. Broad sphere surfaces lack ordered nested room imagery, while planar panel sequences and outer chains remain missing or unresolved. Soft highlights do not establish emitter mapping, while paint attachment and transport history are only partly supported.

Qwen3.6-27B

The artwork depicts a shaded sphere, distinct paint colors and a separate airborne black blob. Crimson's apex overlap does not establish its earlier interaction and transport, while cyan's recent contact remains unsupported. Horizontal centering supplies limited camera agreement, but the sphere, black blob and prominent panel have substantial placement or projection departures. A few planar echoes provide reflection evidence; isolated patches and gradients replace most of the required mirror structure.

Gemma 4 31B

The separate airborne black blob and simplified lower sphere image provide limited agreement. The enlarged, lowered main sphere, unsupported paint interaction histories and largely missing mirror-room structure remain major departures. No visible floor damage supports the separate reward. The retained base total is 29.5/170, and the combined total is 29.5/180.

Score breakdown

CategoryQwen3.8-27BQwen3.6-27BGemma 4 31B
State at 600 ms23.0/255.0/2511.0/25
Camera and placement13.0/155.0/154.5/15
Reflections24.0/1208.0/1208.0/120
Materials and scale6.5/104.0/106.0/10
Floor-damage reward0.0/100.0/100.0/10

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

Qwen3.8-27B

A cohesive emerald-and-gold illustration with a gentle expression, flowing robes, luminous halo and three clearly ringed orbs. Limbs remain connected, and the asymmetric legs communicate floating. The rounded face reads somewhat bear-like; the raised palm faces outward rather than upward, and chest-hand fingers are crowded. Clean ornamentation exceeds the comparatively simple anatomical modeling and shading.

Qwen3.6-27B

An appealing decorative illustration with coordinated ornament, flowing panels and three glowing orbital lights. The arm arrangement reverses the requested sides. Uncertain neck continuity, concealed leg articulation, simplified paws, crowded chest jewelry and shallow surface modeling limit pose clarity and finish.

Gemma 4 31B

A clean, appealing luminous mascot with coherent body continuity and a readable jar-hugging pose. Rounded highlights, smooth gradients and balanced framing work well. The teardrop silhouette, modest eyes and nearly even grin only partly satisfy the character brief; sparse jar construction and simple geometry limit sophistication.

Score breakdown

CategoryQwen3.8-27BQwen3.6-27BGemma 4 31B
Task & likeness8.0/106.5/106.0/10
Anatomy & construction7.5/105.0/106.0/10
Space & placement8.0/106.5/107.5/10
Light & reflections7.5/105.5/106.5/10
Purposeful detail8.0/106.0/105.5/10
Artistry & character7.5/105.0/105.0/10
Materials & effects7.5/105.0/106.5/10
Visual integrity8.5/107.0/107.5/10

Benchmark task

Qwen3.8-27B

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

Qwen3.6-27B

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

Gemma 4 31B

A small luminous creature proudly holding an empty glass jar tests expression, transparent materials and the balance of character and prop.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Qwen3.8-27B

The centered portrait, dark clothing and overlapping hands evoke the Mona Lisa, but replication is weak. The face is excessively elongated, the eyes stare broadly, and the hands reduce to rounded masses with shallow finger marks. Soft shading creates some volume, while the landscape remains indistinct. The precise gold frame is more resolved than the portrait.

Qwen3.6-27B

The portrait loosely evokes Mona Lisa through its palette and silhouette. Readable pupils, brows and lips provide limited detail, and the torso remains continuous. The frontal elongated face, unresolved chest-level limb forms, shallow landscape and pervasive blur substantially weaken likeness, anatomy and finish.

Gemma 4 31B

A coherent but rudimentary interpretation. Dark hair, muted scenery and a slight smile establish recognition, while primitive facial features, frontal construction and an undivided hand shape leave the defining portrait relationships unresolved. Sparse detail and predominantly flat rendering limit volume and material character.

Score breakdown

CategoryQwen3.8-27BQwen3.6-27BGemma 4 31B
Task & likeness4.0/102.5/102.0/10
Anatomy & construction4.5/103.0/102.5/10
Space & placement4.5/104.0/103.5/10
Light & reflections5.0/104.0/102.0/10
Purposeful detail5.0/102.5/102.0/10
Artistry & character5.0/102.5/102.0/10
Materials & effects5.0/103.0/102.5/10
Visual integrity5.0/104.0/105.0/10

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

Qwen3.8-27B

The sweeping palm, glowing sunset and purple-to-orange palette create an appealing beach composition. Birds, animals and reflections fulfill the brief, with clean silhouettes and readable small accents. Schematic anatomy, repetitive shoreline geometry and limited perspective integration constrain depth. Foreground lighting and uniform reflection bars provide atmosphere but little physical coherence.

Qwen3.6-27B

A recognizable sunset beach with balanced palms, clean shapes and effective warm–cool contrast. Small animals and play equipment address the brief, but rudimentary anatomy, uncertain water contacts, sparse reflections and flat materials keep the drawing basic or uneven.

Gemma 4 31B

A balanced beach sunset with a bright glowing sun and two framing palms. The palms have flower-like radial crowns, the crab is a small top-down symbol and the ball's panels do not line up. The three olive reflection ovals and bare sand and water make for a sparse scene with little drawing complexity, depth or material detail.

Score breakdown

CategoryQwen3.8-27BQwen3.6-27BGemma 4 31B
Task & likeness8.5/107.5/106.0/10
Anatomy & construction6.5/105.0/104.0/10
Space & placement6.0/105.5/104.5/10
Light & reflections6.0/105.5/104.5/10
Purposeful detail7.0/104.5/103.5/10
Artistry & character7.0/105.5/103.5/10
Materials & effects6.5/105.5/103.5/10
Visual integrity7.0/107.0/105.5/10

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

Qwen3.8-27B

This benchmark has not been assessed yet.

Qwen3.6-27B

This benchmark has not been assessed yet.

Gemma 4 31B

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

Qwen3.8-27B

The raccoon clearly rides on the dog's back, and the dog reaches the jet ski's steering grip. Cheerful expressions, a bright palette and sweeping wake make the action readable. Anatomy and machinery remain simplified, with overlapping paws and limited seat definition. Flat lighting, sparse surface detail and broad white splash shapes limit depth and finish. A clipped gray fragment interrupts the upper-left corner.

Qwen3.6-27B

A readable cartoon with balanced colors, clean shapes and a clearly supported raccoon. Continuous body construction and modest shading deserve credit. Rudimentary limbs, unresolved steering connections, stiff gestures and schematic water effects limit physical credibility and finish.

Gemma 4 31B

A very primitive cartoon: a grey raccoon blob with a mask and a banded tail rests on an oval dog with goggles, on a flat red parallelogram that barely suggests a jet ski. Limbs are stubs or absent, the long dark bar does not read as steering and the craft has no hull volume. Sky and water gradients and simple wake lines set the scene, but the construction stays kindergarten-level.

Score breakdown

CategoryQwen3.8-27BQwen3.6-27BGemma 4 31B
Task & likeness8.5/104.5/104.5/10
Anatomy & construction6.5/103.5/103.0/10
Space & placement7.0/106.0/104.5/10
Light & reflections5.5/105.5/103.0/10
Purposeful detail6.5/105.5/103.5/10
Artistry & character6.5/104.0/103.0/10
Materials & effects6.5/105.5/104.0/10
Visual integrity7.5/102.5/105.0/10

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

Qwen3.8-27B

The pelican’s oversized bill, straw hat and flowing scarf create a distinctive focal character against a well-composed coastal sunset. Wheels and frame are readable, but the wings do not reach the steering, overlapping legs obscure separate pedal contacts, and the crank linkage is unclear. Clean vector shapes and restrained shading support an appealing illustration with limited physical depth.

Qwen3.6-27B

A lively, coherent illustration with recognizable pelican features, purposeful accessories and useful surface variation. Ambiguous neck layering, uncertain pedal engagement and an unresolved drivetrain limit construction. Aligned wheels and layered scenery establish placement, while inconsistent shadow direction and crowded overlaps constrain finish.

Gemma 4 31B

A clean, cheerful pelican with a curved neck and bright bill sits on a simple red frame. The drawing is primitive: ellipse body, tube neck, flat fills and straight frame lines with no spokes, crank or pedals. Both legs end in footless stubs in mid-air, and neither wing reaches the handlebar, so the riding action is not demonstrated. A ground shadow gives basic anchoring; lighting and materials stay flat.

Score breakdown

CategoryQwen3.8-27BQwen3.6-27BGemma 4 31B
Task & likeness8.0/107.5/105.5/10
Anatomy & construction5.5/104.0/104.0/10
Space & placement7.0/106.5/105.0/10
Light & reflections7.0/105.0/103.5/10
Purposeful detail7.5/106.5/103.0/10
Artistry & character7.5/105.5/104.0/10
Materials & effects6.5/106.5/103.5/10
Visual integrity8.0/106.5/105.0/10

Benchmark task

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