STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Cat Jam Free vs Gemini 3.8 Flash

Gemini 3.8 Flash leads Cat Jam Free by 14.4 points on StealthMark, 47.9 to 33.5. It leads on 8 of 9 benchmarks, including both games, and Cat Jam Free on 1. Gemini 3.8 Flash scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

33.5/100Overall rank 40/53
47.9/100Overall rank 20/53

General Intelligence

27.7/100
43.9/100

Visual Intelligence

43.0/100
55.2/100

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

BENCHMARK BY BENCHMARK

Where each model leads

  • Cat Jam Free
  • Gemini 3.8 Flash
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Cat Jam Free
  • Gemini 3.8 Flash
  • Other models
  • Median
PricePer 1M output tokens, input below
Cat Jam Free: No list priceGemini 3.8 Flash: $3.75$0.75 input
Context windowTokens per request, max output below
Cat Jam Free: Not publishedGemini 3.8 Flash: 1M64K max output
Output speedTokens per second, our measurement
Cat Jam Free: Not measuredGemini 3.8 Flash: 170tokens/s
Developer
Not publishedGoogle
Released
Not published2 Sep 2026
Origin
Not publishedUnited States
Input → output
Not publishedText, image, video, audio, PDF → text

Full datasheets, every price and sourceGemini 3.8 Flash ↗

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

Gemini 3.8 Flash 45.4/100Rank 20/47

Survived 1 of 3
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

Points per level

LevelCat Jam FreeGemini 3.8 Flash
Level 1Second Thoughts
5 ptsOut of lives
4 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
10 ptsSurvived
Level 3Hide or Flight
9 ptsSurvived
11 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

Gemini 3.8 Flash 72.9/100Rank 14/48

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

Points per level

LevelCat Jam FreeGemini 3.8 Flash
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
10 ptsFinished early
18.8 ptsCleared
Level 4Passing bay
10.8 ptsFinished early
17.8 ptsClearedFinished early · 1 beacon left
Level 5Second thoughts
6 ptsFinished early
20.6 ptsCleared

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.

Gemini 3.8 Flash

Crimson is carried well down the camera-facing surface, supporting its earlier interaction. The depiction remains highly simplified, with imperfect material rendering. Isolated wall and floor images and a few highlights provide scant reflective evidence; displaced first reflections, missing receding chains and absent nested sphere and emitter imagery leave the room's optical structure largely unsupported.

Score breakdown

CategoryCat Jam FreeGemini 3.8 Flash
State at 600 ms14.0/2522.5/25
Camera and placement4.0/1511.0/15
Reflections3.5/1204.5/120
Materials and scale4.0/107.0/10
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.

Gemini 3.8 Flash

The dominant four-point silhouette, luminous color progression, raised brows and enormous grin closely fulfill the brief. Attached, secondary limbs support the exuberant expression. Clean facial drawing and glossy eyes give strong character, while shallow depth, minimally articulated extremities and visible steps in the outer glow limit refinement.

Score breakdown

CategoryCat Jam FreeGemini 3.8 Flash
Task & likeness5.5/108.0/10
Anatomy & construction5.5/106.0/10
Space & placement6.0/106.5/10
Light & reflections6.0/107.0/10
Purposeful detail4.0/105.0/10
Artistry & character5.5/103.5/10
Materials & effects5.0/105.0/10
Visual integrity6.5/106.5/10

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.

Gemini 3.8 Flash

A luminous star-shaped creature tests expressive features, a clear silhouette and smooth colour transitions.

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.

Gemini 3.8 Flash

The dark clothing, overlapping hands and hazy landscape make the Mona Lisa reference recognizable. Replication is limited by the frontal, elongated face, heavy mouth and chin, and poorly resolved hands, wrists and forearm. Soft shading gives some volume, but muddy transitions, blunt landscape shapes and rigid facial modeling weaken the portrait’s expression and painterly character.

Score breakdown

CategoryCat Jam FreeGemini 3.8 Flash
Task & likeness2.5/103.0/10
Anatomy & construction2.0/102.0/10
Space & placement4.0/103.5/10
Light & reflections3.5/103.0/10
Purposeful detail3.0/105.0/10
Artistry & character3.0/103.0/10
Materials & effects2.5/105.0/10
Visual integrity5.5/101.0/10

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

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.

Gemini 3.8 Flash

A vivid purple-and-gold sunset anchors an appealing beach composition with dolphins, birds, a turtle and playful accessories. Palm silhouettes frame the bright reflection effectively. Sparse animal anatomy, wirelike palm foliage, conspicuously regular reflection bands and limited surface texture keep the execution below exceptional.

Score breakdown

CategoryCat Jam FreeGemini 3.8 Flash
Task & likeness7.0/109.0/10
Anatomy & construction4.5/107.0/10
Space & placement4.5/107.0/10
Light & reflections4.0/108.0/10
Purposeful detail4.0/107.0/10
Artistry & character4.5/107.0/10
Materials & effects4.5/107.0/10
Visual integrity5.5/108.0/10

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.

Gemini 3.8 Flash

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.

Gemini 3.8 Flash

Expressive animals, a bold diagonal hull and sweeping spray create an appealing action scene. The raccoon's support on the dog's back is unclear, and the dog lacks a readable paw-to-control grip and connected steering assembly. Clean graphic shapes and lively accessories are stronger than the anatomical construction. Sunset illumination and reflections remain largely decorative.

Score breakdown

CategoryCat Jam FreeGemini 3.8 Flash
Task & likeness6.0/107.0/10
Anatomy & construction5.0/106.0/10
Space & placement5.0/107.0/10
Light & reflections5.0/106.5/10
Purposeful detail6.0/107.5/10
Artistry & character5.0/107.5/10
Materials & effects5.0/107.5/10
Visual integrity4.5/107.5/10

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.

Gemini 3.8 Flash

The pelican’s enormous bill, lively feathers and orange bicycle create a clear, appealing composition. Basket contents, spokes and facial details reward inspection. Both legs connect to the body, but foot-to-pedal placement and wing-to-handlebar contact are ambiguous. Bicycle mechanics and lighting remain schematic, limiting an otherwise polished illustration.

Score breakdown

CategoryCat Jam FreeGemini 3.8 Flash
Task & likeness7.0/109.0/10
Anatomy & construction5.0/107.5/10
Space & placement6.0/107.5/10
Light & reflections5.0/107.0/10
Purposeful detail5.5/108.5/10
Artistry & character5.5/108.0/10
Materials & effects6.5/107.0/10
Visual integrity6.5/108.0/10

Benchmark task

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