Gemma 4 31B 30.2/100Rank 31/51

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Terra Low leads Gemma 4 31B by 15.5 points on StealthMark, 41.3 to 25.8. It leads on 8 of 9 benchmarks, including both games, and Gemma 4 31B on 1. GPT-6.1 Terra Low scores higher on Beach, with its largest category advantage in anatomy & construction.
See the difference ↘BENCHMARK BY BENCHMARK
DATASHEET
Full datasheets, every price and sourceGemma 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.


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 ↗


Gemma 4 31B
The sphere's volume, separate airborne black blob and vertical color ordering are readable. The large, low sphere, plain surrounding planes and absent nested optical imagery leave the central geometric and reflection requirements unsupported. Paint contact and transport remain unresolved. Material credit recognizes the visible convex shading, highlights and distinct surface colors while retaining deductions for the schematic finish and oversized blobs.
GPT-6.1 Terra Low
Deformed colored paint and a separate airborne black body establish readable interaction history. Cyan has travelled too far, framing differs substantially, and the mirror system supplies only elementary bands and oval copies. Missing recursive geometry, nested spherical imagery and emitter mapping remain the dominant weaknesses.
| Category | Gemma 4 31B | GPT-6.1 Terra Low |
|---|---|---|
| State at 600 ms | 11.0/25 | 22.0/25 |
| Camera and placement | 3.0/15 | 4.0/15 |
| Reflections | 0.0/120 | 10.0/120 |
| Materials and scale | 5.5/10 | 6.0/10 |
| Floor-damage reward | 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.


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.
GPT-6.1 Terra Low
Six attached outward-facing heads, delicate scales and soft ivory shading establish an orderly decorative motif. Separate paddle-shaped bodies replace the required interlocking loops and leave no enclosed central hexagon. Surface detail provides interest, but repeated simple forms, schematic faces and limited anatomical modeling constrain the result.
| Category | Gemma 4 31B | GPT-6.1 Terra Low |
|---|---|---|
| Task & likeness | 6.0/10 | 4.0/10 |
| Anatomy & construction | 6.0/10 | 3.5/10 |
| Space & placement | 7.5/10 | 4.5/10 |
| Light & reflections | 6.5/10 | 5.5/10 |
| Purposeful detail | 5.5/10 | 5.5/10 |
| Artistry & character | 5.0/10 | 5.0/10 |
| Materials & effects | 6.5/10 | 5.5/10 |
| Visual integrity | 7.5/10 | 4.0/10 |
Gemma 4 31B
A small luminous creature proudly holding an empty glass jar tests expression, transparent materials and the balance of character and prop.
GPT-6.1 Terra Low
A pale serpent woven into an interlocking knot tests connected anatomy, repeated structure and readable overlaps. Organic surface detail must work with the overall geometry.
Precise visual recall and portrait reconstruction.


Gemma 4 31B
The portrait is recognizable through its silhouette, palette and smile, with clean execution of simple shapes. Replication remains weak: the face and pose differ markedly, hands become fingerless ovals, clothing lacks construction, and the landscape loses its atmospheric detail. Basic gradients provide limited volume.
GPT-6.1 Terra Low
A recognizable, coherent portrait with purposeful facial detail, warm local volume and layered scenery. The frontal pose, enlarged face, merged hands and shallow clothing construction substantially limit replication and drawing skill. The visible successes support retaining the current assessment.
| Category | Gemma 4 31B | GPT-6.1 Terra Low |
|---|---|---|
| Task & likeness | 3.0/10 | 5.0/10 |
| Anatomy & construction | 4.0/10 | 4.5/10 |
| Space & placement | 4.0/10 | 5.0/10 |
| Light & reflections | 3.5/10 | 6.0/10 |
| Purposeful detail | 2.0/10 | 5.0/10 |
| Artistry & character | 3.5/10 | 5.5/10 |
| Materials & effects | 2.5/10 | 5.0/10 |
| Visual integrity | 5.5/10 | 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.


Gemma 4 31B
A coherent beach illustration with clean silhouettes, a sweeping shoreline and an effective sunset palette. Requested subjects are recognizable, but primitive animal construction, sparse detail, unsupported palm placement and schematic reflections limit drawing sophistication and physical credibility.
GPT-6.1 Terra Low
A coherent sunset scene demonstrates the beach, animals, birds and reflections. Flowing silhouettes, warm color transitions and intact attachments are its strongest properties. Simplified anatomy, the turtle's elevated viewing angle and symbolic surface effects constrain drawing complexity and physical depth.
| Category | Gemma 4 31B | GPT-6.1 Terra Low |
|---|---|---|
| Task & likeness | 5.0/10 | 8.0/10 |
| Anatomy & construction | 2.0/10 | 5.5/10 |
| Space & placement | 5.0/10 | 5.5/10 |
| Light & reflections | 2.5/10 | 6.5/10 |
| Purposeful detail | 2.0/10 | 6.0/10 |
| Artistry & character | 2.0/10 | 5.0/10 |
| Materials & effects | 2.0/10 | 5.5/10 |
| Visual integrity | 5.0/10 | 7.5/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


Gemma 4 31B
This benchmark has not been assessed yet.
GPT-6.1 Terra Low
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.


Gemma 4 31B
Clean, simple silhouettes communicate a raccoon riding on a dog. Limited animal specificity, absent steering controls and a flat platform weaken the requested scene. Small facial marks provide purposeful detail, while unresolved support, flat lighting and schematic water restrict physical coherence. Primitive but coherent construction supports basic drawing quality.
GPT-6.1 Terra Low
Recognizable animals, a coherent craft and sweeping wake make an appealing cartoon. Basic limb construction, weakly demonstrated raccoon seating and limited shared perspective constrain the scene. Small identifying details work well, while lighting and materials remain broadly graphic.
| Category | Gemma 4 31B | GPT-6.1 Terra Low |
|---|---|---|
| Task & likeness | 2.5/10 | 6.5/10 |
| Anatomy & construction | 3.0/10 | 5.0/10 |
| Space & placement | 4.0/10 | 5.5/10 |
| Light & reflections | 1.0/10 | 4.5/10 |
| Purposeful detail | 2.5/10 | 6.0/10 |
| Artistry & character | 2.5/10 | 5.0/10 |
| Materials & effects | 2.0/10 | 5.0/10 |
| Visual integrity | 7.0/10 | 6.0/10 |
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.


Gemma 4 31B
A clean, readable illustration with balanced placement and coherent basic geometry. The sky gradient and ground shadow establish diffuse illumination. Primitive shapes and sparse detail limit artistry, while unclear leg attachment, missing pedal contact and unresolved steering weaken the riding action.
GPT-6.1 Terra Low
A coherent coastal illustration with a distinctive pelican, controlled contours and clearly organised bicycle wheels. Visible saddle support and shaped neck and wing contours earn credit beyond basic geometric construction. Rubbery legs, unresolved pedal contacts and absent steering contact limit the riding action. Lighting and materials remain restrained and spatially shallow.
| Category | Gemma 4 31B | GPT-6.1 Terra Low |
|---|---|---|
| Task & likeness | 4.0/10 | 7.0/10 |
| Anatomy & construction | 3.0/10 | 5.5/10 |
| Space & placement | 4.5/10 | 6.0/10 |
| Light & reflections | 3.0/10 | 5.5/10 |
| Purposeful detail | 3.0/10 | 6.5/10 |
| Artistry & character | 3.0/10 | 6.0/10 |
| Materials & effects | 4.0/10 | 6.0/10 |
| Visual integrity | 4.5/10 | 6.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.