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

STEALTHMARK · FOUR-MODEL COMPARISON
All comparisons ↗Qwen3.8-27B leads on StealthMark with 51.7, ahead of Qwen3.6-27B (32.4), Gemma 4 31B (29.5) and Gemma 4 26B A4B (21.2). Of the 9 benchmarks compared, Qwen3.8-27B leads on 9. Qwen3.8-27B leads both games.
How many reasoning tokens a model needs for the quality it delivers.
How much Performance you get for your money.
BENCHMARK BY BENCHMARK
DATASHEET
Qwen3.8-27B scores highest on StealthMark. Gemma 4 31B runs fastest in our speed test. Gemma 4 26B A4B costs least per output token.
Full datasheets, every price and sourceQwen3.8-27B ↗Qwen3.6-27B ↗Gemma 4 31B ↗Gemma 4 26B A4B ↗
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.




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.




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




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.
Gemma 4 26B A4B
The candidate demonstrates a rounded sphere, deformed colored regions and separate airborne black paint. Its paint marks do not adequately establish the required contact and transport history. Enlarged framing and almost entirely missing mirror structure remain the dominant failures. The physical-state score is reduced because endpoint checks alone previously left too much credit for an unverified interaction history.
| Category | Qwen3.8-27B | Qwen3.6-27B | Gemma 4 31B | Gemma 4 26B A4B |
|---|---|---|---|---|
| State at 600 ms | 23.0/25 | 5.0/25 | 11.0/25 | 14.0/25 |
| Camera and placement | 13.0/15 | 5.0/15 | 4.5/15 | 4.0/15 |
| Reflections | 24.0/120 | 8.0/120 | 8.0/120 | 2.0/120 |
| Materials and scale | 6.5/10 | 4.0/10 | 6.0/10 | 5.0/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 | 0.0/10 | 0.0/10 |
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Visual construction and creative interpretation.




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.
Gemma 4 26B A4B
A clean, appealing glowing creature with big upward eyes, uneven brows, rosy cheeks and the requested colour gradient. The body is a teardrop rather than a four-point diamond, and the jar is a flat rounded glass panel with no rim or opening. Loose oval hands and feet only suggest the hug and the stance, and the grin is drawn over the glass. Its construction is basic and primitive.
| Category | Qwen3.8-27B | Qwen3.6-27B | Gemma 4 31B | Gemma 4 26B A4B |
|---|---|---|---|---|
| Task & likeness | 8.0/10 | 6.5/10 | 6.0/10 | 6.0/10 |
| Anatomy & construction | 7.5/10 | 5.0/10 | 6.0/10 | 4.5/10 |
| Space & placement | 8.0/10 | 6.5/10 | 7.5/10 | 5.5/10 |
| Light & reflections | 7.5/10 | 5.5/10 | 6.5/10 | 6.0/10 |
| Purposeful detail | 8.0/10 | 6.0/10 | 5.5/10 | 4.5/10 |
| Artistry & character | 7.5/10 | 5.0/10 | 5.0/10 | 4.0/10 |
| Materials & effects | 7.5/10 | 5.0/10 | 6.5/10 | 6.0/10 |
| Visual integrity | 8.5/10 | 7.0/10 | 7.5/10 | 6.5/10 |
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.
Gemma 4 26B A4B
A small luminous creature proudly holding an empty glass jar tests expression, transparent materials and the balance of character and prop.
Precise visual recall and portrait reconstruction.




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.
Gemma 4 26B A4B
Dark framing hair and a faint smile give limited recognition. The mask-like elongated face, the missing arms and crossed hands, and the absent landscape leave the painting barely replicated. A few coherent flat shapes form a centered bust, but the construction is very primitive and nearly free of detail, and soft gradients do not create convincing volume or finish.
| Category | Qwen3.8-27B | Qwen3.6-27B | Gemma 4 31B | Gemma 4 26B A4B |
|---|---|---|---|---|
| Task & likeness | 4.0/10 | 2.5/10 | 2.0/10 | 2.0/10 |
| Anatomy & construction | 4.5/10 | 3.0/10 | 2.5/10 | 3.5/10 |
| Space & placement | 4.5/10 | 4.0/10 | 3.5/10 | 3.0/10 |
| Light & reflections | 5.0/10 | 4.0/10 | 2.0/10 | 3.5/10 |
| Purposeful detail | 5.0/10 | 2.5/10 | 2.0/10 | 1.5/10 |
| Artistry & character | 5.0/10 | 2.5/10 | 2.0/10 | 3.0/10 |
| Materials & effects | 5.0/10 | 3.0/10 | 2.5/10 | 2.5/10 |
| Visual integrity | 5.0/10 | 4.0/10 | 5.0/10 | 6.0/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.




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.
Gemma 4 26B A4B
A clean, coherent sunset with the sun resting on the horizon and a framing palm. The scene is very sparse: a tiny crab seen from above, a flat two-colour ball and three bird arcs carry all of the animals and fun. Grey-green reflection ovals, bare sand and water, and almost no attempted detail keep construction, light and artistry primitive.
| Category | Qwen3.8-27B | Qwen3.6-27B | Gemma 4 31B | Gemma 4 26B A4B |
|---|---|---|---|---|
| Task & likeness | 8.5/10 | 7.5/10 | 6.0/10 | 6.0/10 |
| Anatomy & construction | 6.5/10 | 5.0/10 | 4.0/10 | 4.0/10 |
| Space & placement | 6.0/10 | 5.5/10 | 4.5/10 | 4.5/10 |
| Light & reflections | 6.0/10 | 5.5/10 | 4.5/10 | 4.5/10 |
| Purposeful detail | 7.0/10 | 4.5/10 | 3.5/10 | 3.0/10 |
| Artistry & character | 7.0/10 | 5.5/10 | 3.5/10 | 3.5/10 |
| Materials & effects | 6.5/10 | 5.5/10 | 3.5/10 | 3.5/10 |
| Visual integrity | 7.0/10 | 7.0/10 | 5.5/10 | 6.0/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.




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.
Gemma 4 26B A4B
This benchmark has not been assessed yet.
A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.
Scene composition and interacting subjects.




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.
Gemma 4 26B A4B
A tidy but very primitive scene: an oval dog with a frontal face lies on a red trapezoid raft, with a grey raccoon blob on its back. The raccoon has cat-like ears and an unbanded tail, and neither animal has readable limbs. There is no seat, hull or attached steering, and the deck fades into a pale band above the horizon. Smooth sky and water gradients and a clear palette are the main strengths.
| Category | Qwen3.8-27B | Qwen3.6-27B | Gemma 4 31B | Gemma 4 26B A4B |
|---|---|---|---|---|
| Task & likeness | 8.5/10 | 4.5/10 | 4.5/10 | 4.0/10 |
| Anatomy & construction | 6.5/10 | 3.5/10 | 3.0/10 | 3.0/10 |
| Space & placement | 7.0/10 | 6.0/10 | 4.5/10 | 4.5/10 |
| Light & reflections | 5.5/10 | 5.5/10 | 3.0/10 | 4.0/10 |
| Purposeful detail | 6.5/10 | 5.5/10 | 3.5/10 | 3.5/10 |
| Artistry & character | 6.5/10 | 4.0/10 | 3.0/10 | 3.0/10 |
| Materials & effects | 6.5/10 | 5.5/10 | 4.0/10 | 3.5/10 |
| Visual integrity | 7.5/10 | 2.5/10 | 5.0/10 | 4.5/10 |
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.
Subject construction and spatial relationships.




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.
Gemma 4 26B A4B
A recognisable pelican with a long neck and bright pouched bill stands upright on a simple teal bicycle against gradient sky and grass. One straight, jointless leg reaches a pedal, but the wing does not touch the handlebar, so riding is only partly shown. The frame lacks seat stays, the crank is a stub and the wheels carry only crossbar spokes. Construction stays elementary, with flat fills and little modelling despite the visible sun.
| Category | Qwen3.8-27B | Qwen3.6-27B | Gemma 4 31B | Gemma 4 26B A4B |
|---|---|---|---|---|
| Task & likeness | 8.0/10 | 7.5/10 | 5.5/10 | 6.0/10 |
| Anatomy & construction | 5.5/10 | 4.0/10 | 4.0/10 | 4.0/10 |
| Space & placement | 7.0/10 | 6.5/10 | 5.0/10 | 5.0/10 |
| Light & reflections | 7.0/10 | 5.0/10 | 3.5/10 | 3.5/10 |
| Purposeful detail | 7.5/10 | 6.5/10 | 3.0/10 | 3.5/10 |
| Artistry & character | 7.5/10 | 5.5/10 | 4.0/10 | 4.0/10 |
| Materials & effects | 6.5/10 | 6.5/10 | 3.5/10 | 3.5/10 |
| Visual integrity | 8.0/10 | 6.5/10 | 5.0/10 | 6.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.