STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Cat Jam Free vs GPT-6.1 Sol

GPT-6.1 Sol leads Cat Jam Free by 34.3 points on StealthMark, 67.8 to 33.5. It leads on all 9 benchmarks. GPT-6.1 Sol scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

33.5/100Overall rank 40/53
67.8/100Overall rank 4/53

General Intelligence

27.7/100
64.4/100

Visual Intelligence

43.0/100
74.1/100

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

  • GPT-6.1 Sol

Open or local

NeitherApache-2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Cat Jam Free
  • GPT-6.1 Sol
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Cat Jam Free
  • GPT-6.1 Sol
  • Other models
  • Median
PricePer 1M output tokens, input below
Cat Jam Free: No list priceGPT-6.1 Sol: $10$2 input
Context windowTokens per request, max output below
Cat Jam Free: Not publishedGPT-6.1 Sol: 1.05M128K max output
Output speedTokens per second, our measurement
Cat Jam Free: Not measuredGPT-6.1 Sol: 51tokens/s
Developer
Not publishedOpenAI
Released
Not published29 Sep 2026
Origin
Not publishedUnited States
Input → output
Not publishedText, image → text

Full datasheets, every price and sourceGPT-6.1 Sol ↗

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

GPT-6.1 Sol 62.0/100Rank 9/47

Survived 2 of 3
Foresight: complete playing field
Level 318 ptsTurn 20 / 20

Points per level

LevelCat Jam FreeGPT-6.1 Sol
Level 1Second Thoughts
5 ptsOut of lives
26 ptsSurvived
Level 2Pressure Pot
6 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
18 ptsSurvived

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

GPT-6.1 Sol 87.6/100Rank 1/48

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

Points per level

LevelCat Jam FreeGPT-6.1 Sol
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
10.2 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
10 ptsFinished early
19.2 ptsCleared
Level 4Passing bay
10.8 ptsFinished early
18.2 ptsClearedFinished early · 3 beacons 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.

GPT-6.1 Sol

Recognizable first sphere images and several central planar lights provide limited geometric agreement. Missing outer chains, truncated panel sequences and simplified interiors across the main, side and floor spheres leave most of the recursive reflection structure unsupported.

Score breakdown

CategoryCat Jam FreeGPT-6.1 Sol
State at 600 ms14.0/2524.0/25
Camera and placement4.0/1515.0/15
Reflections3.5/12035.0/120
Materials and scale4.0/1010.0/10
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.

GPT-6.1 Sol

Six outward-facing heads and evenly arranged loops make the pale interlocking knot immediately readable. Uniform widths, angular inner bends and fine scales preserve its ornamental geometry. The bodies feel more like textured tubes than living muscle: shading is subdued, crossing contact shadows are weak, and visible curved seams interrupt surface continuity. Small heads have readable eyes and jaws but limited anatomical depth.

Score breakdown

CategoryCat Jam FreeGPT-6.1 Sol
Task & likeness5.5/108.5/10
Anatomy & construction5.5/107.5/10
Space & placement6.0/108.0/10
Light & reflections6.0/107.0/10
Purposeful detail4.0/107.5/10
Artistry & character5.5/107.5/10
Materials & effects5.0/107.0/10
Visual integrity6.5/108.0/10

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.

GPT-6.1 Sol

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.

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.

GPT-6.1 Sol

The recognizable pose, dark clothing and misty landscape form a coherent portrait. Soft facial shading creates volume, but the broad face, outlined eyes and simplified smile limit likeness. Overlapping hands have flattened fingers and ambiguous separation. Angular landscape shapes and sparse fabric detail keep the execution competent rather than masterful.

Score breakdown

CategoryCat Jam FreeGPT-6.1 Sol
Task & likeness2.5/106.5/10
Anatomy & construction2.0/105.5/10
Space & placement4.0/106.5/10
Light & reflections3.5/106.5/10
Purposeful detail3.0/105.5/10
Artistry & character3.0/106.5/10
Materials & effects2.5/106.0/10
Visual integrity5.5/107.0/10

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.

GPT-6.1 Sol

A cohesive sunset palette, sweeping shoreline and framing palm create an appealing beach illustration. Animals, birds, play and a prominent sun reflection fulfill the brief. Connected but schematic figures and simplified dolphin anatomy limit construction; stepped reflections and mostly flat surfaces limit lighting and material depth. Small beach accessories remain readable and edges are clean.

Score breakdown

CategoryCat Jam FreeGPT-6.1 Sol
Task & likeness7.0/108.5/10
Anatomy & construction4.5/107.5/10
Space & placement4.5/107.5/10
Light & reflections4.0/107.5/10
Purposeful detail4.0/107.5/10
Artistry & character4.5/107.0/10
Materials & effects4.5/107.0/10
Visual integrity5.5/108.5/10

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.

GPT-6.1 Sol

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.

GPT-6.1 Sol

The masked raccoon rides the dog's back, and the dog's forepaw meets a handlebar connected to the deck. Expressive faces, a striped tail and sweeping wake create an appealing composition. Overlapping bodies compress the seating and rear-leg anatomy; hull depth and sunset illumination remain schematic.

Score breakdown

CategoryCat Jam FreeGPT-6.1 Sol
Task & likeness6.0/108.5/10
Anatomy & construction5.0/107.5/10
Space & placement5.0/107.5/10
Light & reflections5.0/106.5/10
Purposeful detail6.0/108.0/10
Artistry & character5.0/108.0/10
Materials & effects5.0/107.5/10
Visual integrity4.5/108.5/10

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.

GPT-6.1 Sol

A clearly recognizable pelican rides a well-composed bicycle through a warm coastal scene. The expressive bill, restrained palette and carefully drawn wheels give the illustration character. Leg-to-pedal connections are less convincing, especially the obscured far foot. Lighting provides gentle volume but little directional shadow. The small subtitle is clipped at the lower border.

Score breakdown

CategoryCat Jam FreeGPT-6.1 Sol
Task & likeness7.0/109.0/10
Anatomy & construction5.0/107.0/10
Space & placement6.0/108.0/10
Light & reflections5.0/107.0/10
Purposeful detail5.5/108.0/10
Artistry & character5.5/108.5/10
Materials & effects6.5/107.5/10
Visual integrity6.5/108.0/10

Benchmark task

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