STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Inkling-Small vs Muse Spark 1.3

Muse Spark 1.3 leads Inkling-Small by 12.2 points on StealthMark, 39.8 to 27.6. It leads on 7 of 9 benchmarks, including both games, and Inkling-Small on 2. Muse Spark 1.3 scores higher on Raccoon, with its largest category advantage in anatomy & construction.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

27.6/100Overall rank 43/53
39.8/100Overall rank 34/53

General Intelligence

25.5/100
38.3/100

Visual Intelligence

31.1/100
42.3/100

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

  • Inkling-Small

Open or local

Open modelApache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Inkling-Small
  • Muse Spark 1.3
  • Other models
  • Median

DATASHEET

Specs and pricing

Both take about 1M tokens of context.

  • Inkling-Small
  • Muse Spark 1.3
  • Other models
  • Median
PricePer 1M output tokens, input below
Inkling-Small: No list priceMuse Spark 1.3: $4.25$1.25 input
Context windowTokens per request, max output below
Inkling-Small: 1MTiedMuse Spark 1.3: 1MTied
Output speedTokens per second, our measurement
Inkling-Small: Not measuredMuse Spark 1.3: 321tokens/s
SizeTotal and active parameters
Inkling-Small: 276B12B activeMuse Spark 1.3: Not disclosed
Developer
Thinking Machines LabMeta
Released
Not published2 Sep 2026
Origin
Not publishedUnited States
Input → output
Text, image, audio → textText, image, video, audio, PDF → text
Architecture
42-layer decoder-only transformer with sparse mixture-of-experts feed-forward (6 of 256 routed experts plus 2 shared per token); hybrid local and global attention; natively multimodal with a hierarchical patch image encoder and discrete-token audioNot published

Full datasheets, every price and sourceInkling-Small ↗Muse Spark 1.3 ↗

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.

Inkling-Small 30.2/100Rank 29/49

Survived 0 of 3
Foresight: complete playing field
Level 38 ptsTurn 17 / 20

Muse Spark 1.3 64.3/100Rank 6/49

Survived 2 of 3
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

Points per level

LevelInkling-SmallMuse Spark 1.3
Level 1Second Thoughts
9 ptsOut of lives
26 ptsSurvived
Level 2Pressure Pot
6 ptsOut of lives
10 ptsSurvived
Level 3Hide or Flight
8 ptsOut of lives
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.

Inkling-Small 34.7/100Rank 34/50

Cleared 3 of 5
Latch: complete playing field
Level 518 ptsTurn 40 / 40

Muse Spark 1.3 72.4/100Rank 27/503 of 5 levels

3 of 5 played
Latch: complete playing field
Level 318.8 ptsTurn 32 / 36

Points per level

LevelInkling-SmallMuse Spark 1.3
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
2.8 ptsFinished early
18.8 ptsCleared
Level 4Passing bay
8 ptsFinished early
Pending
Level 5Second thoughts
18 ptsCleared
Not played

Newton's Mirror

Same task instructions

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

The judgment

Inkling-Small

The sphere's apparent floor support, separate dark feature and broad paint ordering justify partial state credit. The major weakness is the largely missing mirror system: isolated side images and faint floor echoes do not establish repeated virtual rooms or curved spherical mapping. Downward framing, the oversized frontal panel, unresolved paint transport and satin surface appearance remain distinct limitations.

Muse Spark 1.3

The paint state is incorrectly and poorly drawn, despite a recognizable sphere-and-paint setup. The oversized sphere, oversized compact paint bodies, and blurred wall and floor images further limit the result. Isolated reflection cues provide very little support for the required repeated virtual rooms, nested spherical imagery or emitter mapping.

Score breakdown

CategoryInkling-SmallMuse Spark 1.3
State at 600 ms14.0/256.0/25
Camera and placement3.0/158.5/15
Reflections8.0/1205.5/120
Materials and scale2.5/104.0/10
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

Inkling-Small

The faces and dripping caps communicate a cute mushroom scene, but simple construction and weak spatial relationships limit the result. The defining foot-stamping action is unresolved, the flattering portrait is smaller than its painter, and the requested material contrasts are only partly conveyed.

Muse Spark 1.3

The luminous creature and geometric mirror counterpart communicate self-recognition through a coherent palette and expressive eyes. The transformed reflection is purposeful. Simple oval anatomy, ambiguous reaching-arm construction, shallow spatial staging and limited illumination of nearby surfaces keep the illustration below exceptional execution.

Score breakdown

CategoryInkling-SmallMuse Spark 1.3
Task & likeness2.5/108.0/10
Anatomy & construction1.5/105.0/10
Space & placement3.5/106.5/10
Light & reflections3.0/107.0/10
Purposeful detail4.5/106.5/10
Artistry & character3.0/105.5/10
Materials & effects3.5/106.5/10
Visual integrity2.0/107.5/10

Benchmark task

Inkling-Small

Character scenes test expression, anatomy, materials and coherent visual construction.

Muse Spark 1.3

An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.

Mona Lisa

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

Inkling-Small

A recognizable but rudimentary Mona Lisa interpretation. Facial shading and subdued colors provide coherence, while the frontal blocklike torso, unresolved wrists, fingerless hands and shallow landscape substantially limit likeness, construction and finish.

Muse Spark 1.3

Dark hair, a restrained smile and overlapping hands suggest Mona Lisa, but replication is weak. The face is markedly elongated, the hands are oval pads with faint finger strokes, and the atmospheric landscape is absent. Soft gradients provide basic volume, while the frontal symmetry, shallow space and sparse clothing detail limit the portrait’s drawing quality.

Score breakdown

CategoryInkling-SmallMuse Spark 1.3
Task & likeness2.5/101.0/10
Anatomy & construction2.5/101.5/10
Space & placement3.0/101.5/10
Light & reflections2.5/101.5/10
Purposeful detail2.0/101.0/10
Artistry & character2.5/101.5/10
Materials & effects2.0/101.5/10
Visual integrity3.0/103.0/10

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

Inkling-Small

A recognizable sunset beach with a clear focal sun and appealing color transitions. Connected fish silhouettes and layered scenery establish basic coherence. Primitive figures, ambiguous recreation, sparse descriptive detail and weak grounding limit construction and depth. The aligned reflection supplies a useful lighting cue, but shadows and material effects remain underdeveloped.

Muse Spark 1.3

The warm sunset, framing palms and colorful beach accessories create an appealing scene with the requested animals, birds and reflections. Construction remains schematic: the raised hand misses the kite string, and a doglike silhouette hangs above the water without clear support. The sun reflection establishes a focal path, but shadows and materials lack depth. An unexplained horizontal bar crosses the sun.

Score breakdown

CategoryInkling-SmallMuse Spark 1.3
Task & likeness3.5/106.5/10
Anatomy & construction3.0/103.0/10
Space & placement3.0/105.5/10
Light & reflections3.0/106.5/10
Purposeful detail3.0/105.0/10
Artistry & character3.0/103.5/10
Materials & effects2.5/103.0/10
Visual integrity2.0/103.5/10

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

Inkling-Small

This benchmark has not been assessed yet.

Muse Spark 1.3

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

Inkling-Small

Recognizable animals, readable accessories and an appealing sunset support a coherent basic cartoon. Rounded construction leaves joints, riding support and steering unresolved. Decorative gradients contribute atmosphere, but directional lighting, distinct materials and convincing water displacement are weakly demonstrated.

Muse Spark 1.3

The raccoon clearly rides on the dog's back, and the dog's paws reach the jet ski controls. Expressive faces and bright colors make the scene appealing. Simplified joints, crowded steering geometry and shallow hull perspective limit construction. The sun has no corresponding water reflection, and the splash shapes convey speed more clearly than convincing displacement.

Score breakdown

CategoryInkling-SmallMuse Spark 1.3
Task & likeness4.0/108.5/10
Anatomy & construction3.0/106.5/10
Space & placement4.0/107.0/10
Light & reflections5.0/105.0/10
Purposeful detail5.5/106.5/10
Artistry & character4.0/105.5/10
Materials & effects5.0/106.0/10
Visual integrity5.0/107.5/10

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

Inkling-Small

The pelican is immediately recognizable, and its sweeping neck, shaped bill and orderly spokes provide character. Riding remains only partially realized: legs, pedal engagement, steering and seat support cannot be read confidently. Controlled graphic effects add atmosphere, but simplified construction and weak grounding keep the result basic.

Muse Spark 1.3

The pelican and bicycle are immediately recognizable, with an expressive face, bold bill and cheerful composition. Both legs connect to the body and reach pedal-like supports, but articulation, saddle support and wing contact with the handlebar remain unclear. Wheel alignment and layering are coherent. Simple landscape shapes, generic shadows and limited material variation constrain the finish.

Score breakdown

CategoryInkling-SmallMuse Spark 1.3
Task & likeness4.0/108.5/10
Anatomy & construction3.0/106.0/10
Space & placement3.0/107.0/10
Light & reflections3.0/106.0/10
Purposeful detail4.5/107.0/10
Artistry & character5.0/105.5/10
Materials & effects4.5/106.5/10
Visual integrity3.0/107.0/10

Benchmark task

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