STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Cat Jam Free vs Gemma 4 31B

Cat Jam Free leads Gemma 4 31B by 7.7 points on StealthMark, 33.5 to 25.8. It leads on 7 of 9 benchmarks, including both games, and Gemma 4 31B on 2. Cat Jam Free scores higher on Raccoon, with its largest category advantage in prompt & likeness.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

33.5/100Overall rank 40/53
25.8/100Overall rank 44/53

General Intelligence

27.7/100
19.1/100

Visual Intelligence

43.0/100
36.7/100

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

Open or local

NeitherApache-2.0
Local modelOpen model · Apache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Cat Jam Free
  • Gemma 4 31B
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Cat Jam Free
  • Gemma 4 31B
  • Other models
  • Median
PricePer 1M output tokens, input below
Cat Jam Free: No list priceGemma 4 31B: $0.40$0.14 input
Context windowTokens per request, max output below
Cat Jam Free: Not publishedGemma 4 31B: 256K
Output speedTokens per second, our measurement
Cat Jam Free: Not measuredGemma 4 31B: 116tokens/s
SizeTotal and active parameters
Cat Jam Free: Not disclosedGemma 4 31B: 30.7BAll activeEstimated
Developer
Not publishedGoogle DeepMind
Released
Not published2 Apr 2026
Origin
Not publishedUnited States
Input → output
Not publishedText, image → text
Architecture
Not publishedDense multimodal transformer with interleaved sliding-window and global attention

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.

Cat Jam Free 33.8/100Rank 26/47

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

Gemma 4 31B 30.2/100Rank 30/47

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

Points per level

LevelCat Jam FreeGemma 4 31B
Level 1Second Thoughts
5 ptsOut of lives
9 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
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.

Cat Jam Free 33.9/100Rank 33/48

Cleared 2 of 5
Latch: complete playing field
Level 56 ptsTurn 25 / 40

Gemma 4 31B 26.6/100Rank 39/484 of 5 levels

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

Points per level

LevelCat Jam FreeGemma 4 31B
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9 ptsCleared
Level 3Relay vault
10 ptsFinished early
13.2 ptsFinished early
Level 4Passing bay
10.8 ptsFinished early
2.2 ptsFinished early
Level 5Second thoughts
6 ptsFinished early
Not played

Newton's Mirror

Same task instructions

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

The judgment

Cat Jam Free

The image conveys a supported central sphere, separate black paint and crimson below cyan. Its contact and transport story is partially resolved. The exterior cutaway camera and largely missing mirror system dominate the limitations; isolated discs and smooth highlights provide little coherent optical structure.

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.

Score breakdown

CategoryCat Jam FreeGemma 4 31B
State at 600 ms14.0/2511.0/25
Camera and placement4.0/153.0/15
Reflections3.5/1200.0/120
Materials and scale4.0/105.5/10
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

Cat Jam Free

A coherent, restrained cat illustration captures the pale palette and intent eyes. Its central expressive requirement—the committed forward-and-down neck bob—is insufficiently articulated. Simple geometry, faint paw construction and minimal surface detail limit the physical presence 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

CategoryCat Jam FreeGemma 4 31B
Task & likeness5.5/106.0/10
Anatomy & construction5.5/106.0/10
Space & placement6.0/107.5/10
Light & reflections6.0/106.5/10
Purposeful detail4.0/105.5/10
Artistry & character5.5/105.0/10
Materials & effects5.0/106.5/10
Visual integrity6.5/107.5/10

Benchmark task

Cat Jam Free

An ivory cat nods intently to music beside a tiny speaker. The scene tests feline anatomy, movement conveyed through a still pose and the contrast between pale fur and woven fabric.

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

Cat Jam Free

The portrait is recognizable and cleanly assembled, but replication remains basic. Its frontal symmetry, elongated silhouette, simplified facial likeness and unresolved hands differ markedly from the original. Modest skin gradients provide volume, while clothing and landscape rely on broad, flat shapes.

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.

Score breakdown

CategoryCat Jam FreeGemma 4 31B
Task & likeness2.5/103.0/10
Anatomy & construction2.0/104.0/10
Space & placement4.0/104.0/10
Light & reflections3.5/103.5/10
Purposeful detail3.0/102.0/10
Artistry & character3.0/103.5/10
Materials & effects2.5/102.5/10
Visual integrity5.5/105.5/10

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

Cat Jam Free

The scene clearly supplies the requested beach subjects and playful activity. Clean silhouettes and warm gradients support readability, but elementary drawing, ambiguous parasol construction, weak grounding and a rigid sun reflection limit its depth and finish.

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.

Score breakdown

CategoryCat Jam FreeGemma 4 31B
Task & likeness7.0/105.0/10
Anatomy & construction4.5/102.0/10
Space & placement4.5/105.0/10
Light & reflections4.0/102.5/10
Purposeful detail4.0/102.0/10
Artistry & character4.5/102.0/10
Materials & effects4.5/102.0/10
Visual integrity5.5/105.0/10

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

Cat Jam Free

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

Cat Jam Free

An appealing cartoon demonstrates the back-riding arrangement through expressive faces and clean shapes. Uncertain steering contact, indistinct deck support and weak hull-water interaction limit physical coherence. Smooth gradients add volume, but simple rounded construction and sparse material detail constrain complexity and finish.

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.

Score breakdown

CategoryCat Jam FreeGemma 4 31B
Task & likeness6.0/102.5/10
Anatomy & construction5.0/103.0/10
Space & placement5.0/104.0/10
Light & reflections5.0/101.0/10
Purposeful detail6.0/102.5/10
Artistry & character5.0/102.5/10
Materials & effects5.0/102.0/10
Visual integrity4.5/107.0/10

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

Cat Jam Free

A coherent cartoon with readable bicycle placement, controlled outlines and modest surface shading. The separated-looking upper bill weakens pelican likeness; schematic limbs, uncertain gripping contact and simplified mechanics constrain construction. Opaque wheel interiors flatten spatial relationships. Limited feather complexity and directional lighting keep the finish modest.

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.

Score breakdown

CategoryCat Jam FreeGemma 4 31B
Task & likeness7.0/104.0/10
Anatomy & construction5.0/103.0/10
Space & placement6.0/104.5/10
Light & reflections5.0/105.0/10
Purposeful detail5.5/103.0/10
Artistry & character5.5/103.0/10
Materials & effects6.5/104.0/10
Visual integrity6.5/104.5/10

Benchmark task

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