STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Cat Jam Free vs Qwen3.8-Flash

Qwen3.8-Flash leads Cat Jam Free by 13.1 points on StealthMark, 46.6 to 33.5. It leads on 8 of 9 benchmarks, including Latch, and Cat Jam Free on 1, including Foresight. Qwen3.8-Flash scores higher on Beach, with its largest category advantage in space & placement.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

33.5/100Overall rank 40/53
46.6/100Overall rank 23/53

General Intelligence

27.7/100
38.5/100

Visual Intelligence

43.0/100
60.3/100

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 · Qwen Community 1.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Cat Jam Free
  • Qwen3.8-Flash
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Cat Jam Free
  • Qwen3.8-Flash
  • Other models
  • Median
PricePer 1M output tokens, input below
Cat Jam Free: No list priceQwen3.8-Flash: $0.38$0.11 input
Context windowTokens per request, max output below
Cat Jam Free: Not publishedQwen3.8-Flash: 1M128K max output
Output speedTokens per second, our measurement
Cat Jam Free: Not measuredQwen3.8-Flash: 75tokens/s
SizeTotal and active parameters
Cat Jam Free: Not disclosedQwen3.8-Flash: 180B6B activeEstimated
Developer
Not publishedQwen / Alibaba Cloud
Released
Not published26 Aug 2026
Origin
Not publishedChina
Input → output
Not publishedText, image, video → text
Architecture
Not publishedHosted Flash based on Flash-Next: sparse attention and n-gram memory; Flash-Next previews Qwen 4 architecture

Full datasheets, every price and sourceQwen3.8-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

Qwen3.8-Flash 29.7/100Rank 33/47

Survived 1 of 3
Foresight: complete playing field
Level 35 ptsTurn 10 / 20

Points per level

LevelCat Jam FreeQwen3.8-Flash
Level 1Second Thoughts
5 ptsOut of lives
26 ptsSurvived
Level 2Pressure Pot
6 ptsOut of lives
3 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
5 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

Qwen3.8-Flash 69.8/100Rank 16/48

Cleared 5 of 5
Latch: complete playing field
Level 520 ptsTurn 30 / 40

Points per level

LevelCat Jam FreeQwen3.8-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
17.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
6 ptsFinished early
20 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.

Qwen3.8-Flash

The full-frame illustration supports a central steel sphere, an airborne black blob and the relative ordering of cyan and crimson. Its faint floor return and symmetric repetitions provide sparse mirror structure; outer chains, large reflected images, nested imagery and emitter mapping remain deficient. Vertical framing is substantially displaced, and paint contact histories remain unresolved.

Score breakdown

CategoryCat Jam FreeQwen3.8-Flash
State at 600 ms14.0/2519.0/25
Camera and placement4.0/153.5/15
Reflections3.5/1209.5/120
Materials and scale4.0/104.0/10
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.

Qwen3.8-Flash

A coherent, appealing fantasy illustration with disciplined framing, luminous teal accents and consistent ornament. Most requested elements are clearly present. The bear-like facial proportions, lowered resting hand, obscured bent-leg construction and limited fabric modeling constrain likeness and anatomical clarity; glow effects are attractive but weakly integrated with surrounding surfaces.

Score breakdown

CategoryCat Jam FreeQwen3.8-Flash
Task & likeness5.5/108.0/10
Anatomy & construction5.5/107.0/10
Space & placement6.0/108.0/10
Light & reflections6.0/107.5/10
Purposeful detail4.0/108.0/10
Artistry & character5.5/107.5/10
Materials & effects5.0/107.5/10
Visual integrity6.5/108.5/10

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.

Qwen3.8-Flash

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

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.

Qwen3.8-Flash

The dark dress, crossed hands and hazy landscape evoke the Mona Lisa, but replication is limited by a generic frontal face, coarse smile and poorly articulated fingers. The gold frame has clearer definition than the portrait. Heavy mottling obscures features, while soft shading provides some volume without convincing anatomical detail.

Score breakdown

CategoryCat Jam FreeQwen3.8-Flash
Task & likeness2.5/105.0/10
Anatomy & construction2.0/104.5/10
Space & placement4.0/105.5/10
Light & reflections3.5/105.5/10
Purposeful detail3.0/105.5/10
Artistry & character3.0/105.5/10
Materials & effects2.5/105.5/10
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.

Qwen3.8-Flash

Sweeping palms, coordinated sunset colors and a central reflection create an expressive beach composition with clear depth. Birds, animals and varied activities thoroughly realize the brief. Small figures and animal anatomy remain rudimentary, water movement is schematic, and contact shadows are weak. Scattered foreground details and the clipped orange disk limit the finish.

Score breakdown

CategoryCat Jam FreeQwen3.8-Flash
Task & likeness7.0/109.0/10
Anatomy & construction4.5/107.0/10
Space & placement4.5/108.0/10
Light & reflections4.0/107.5/10
Purposeful detail4.0/108.5/10
Artistry & character4.5/108.0/10
Materials & effects4.5/106.5/10
Visual integrity5.5/107.0/10

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.

Qwen3.8-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.

Qwen3.8-Flash

The raccoon clearly rides the dog's back, with expressive features and appealing blue-orange color contrast. The dog's paws do not clearly operate connected controls, and the shallow vehicle lacks convincing jet ski construction. Clean outlines support the cartoon style, but generic shading and blurred water streaks limit depth and motion.

Score breakdown

CategoryCat Jam FreeQwen3.8-Flash
Task & likeness6.0/107.0/10
Anatomy & construction5.0/105.5/10
Space & placement5.0/106.5/10
Light & reflections5.0/105.5/10
Purposeful detail6.0/107.0/10
Artistry & character5.0/106.5/10
Materials & effects5.0/105.5/10
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.

Qwen3.8-Flash

The pelican's expressive face, oversized bill and flowing scarf create an appealing focal point. The bicycle has recognizable frame, chain and wheel construction, but the far foot lacks a clear pedal connection and the wing's steering contact is ambiguous. Clean contours and gentle gradients support the illustration; simplified volume and weak directional shadows limit depth.

Score breakdown

CategoryCat Jam FreeQwen3.8-Flash
Task & likeness7.0/108.5/10
Anatomy & construction5.0/108.0/10
Space & placement6.0/107.5/10
Light & reflections5.0/106.5/10
Purposeful detail5.5/108.0/10
Artistry & character5.5/108.0/10
Materials & effects6.5/107.0/10
Visual integrity6.5/107.5/10

Benchmark task

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