STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Glyph Cluster vs Muse Spark Open

Muse Spark Open leads Glyph Cluster by 25.2 points on StealthMark, 44.1 to 18.9. It leads on all 9 benchmarks. Muse Spark Open scores higher on Ground Truth.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

18.9/100Overall rank 48/53
44.1/100Overall rank 29/53

General Intelligence

12.0/100
42.6/100

Visual Intelligence

29.8/100
46.6/100

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

  • Muse Spark Open

Open or local

BENCHMARK BY BENCHMARK

Where each model leads

  • Glyph Cluster
  • Muse Spark Open
  • Other models
  • Median

DATASHEET

Specs and pricing

Muse Spark Open scores higher on StealthMark and runs 5.3× faster in our speed test.

  • Glyph Cluster
  • Muse Spark Open
  • Other models
  • Median
PricePer 1M output tokens, input below
Glyph Cluster: No list priceMuse Spark Open: $4.25$1.25 input
Context windowTokens per request, max output below
Glyph Cluster: Not publishedMuse Spark Open: 1M1M max output
Output speedTokens per second, our measurement
Glyph Cluster: 69tokens/sMuse Spark Open: 3615.3× fastertokens/s
SizeTotal and active parameters
Glyph Cluster: Not disclosedMuse Spark Open: 816B42B active
Developer
Not publishedMeta
Released
Not published15 Oct 2026
Origin
Not publishedUnited States
Input → output
Not publishedText, image, audio, video → text
Architecture
Not publishedSparse mixture-of-experts Transformer with perception encoders; 62 decoder layers, 256 experts with 8 selected per token, grouped-query attention and sliding-window/full-attention layers.

Full datasheets, every price and sourceMuse Spark Open ↗

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.

Glyph Cluster 6.4/100Rank 44/47

Survived 0 of 3
Foresight: complete playing field
Level 33 ptsTurn 5 / 20

Muse Spark Open 29.4/100Rank 34/47

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

Points per level

LevelGlyph ClusterMuse Spark Open
Level 1Second Thoughts
3 ptsOut of lives
4 ptsOut of lives
Level 2Pressure Pot
3 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
3 ptsOut of lives
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.

Glyph Cluster 3.6/100Rank 44/48

Cleared 1 of 5
Latch: complete playing field
Level 59 ptsTurn 25 / 40

Muse Spark Open 75.7/100Rank 12/48

Cleared 5 of 5
Latch: complete playing field
Level 519.6 ptsTurn 32 / 40

Points per level

LevelGlyph ClusterMuse Spark Open
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
2 ptsOut of turns
9.8 ptsCleared
Level 3Relay vault
4.2 ptsFinished early
19.2 ptsCleared
Level 4Passing bay
1 ptsOut of turns
17.8 ptsClearedFinished early · 1 beacon left
Level 5Second thoughts
9 ptsFinished early
19.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Glyph Cluster

Rounded sphere volume, compact colored forms and crimson-below-cyan ordering provide limited agreement. The visible paint does not establish the required interaction history, the sphere and black blob are displaced from the prescribed projection, and most of the defining mirror-room structure is missing or unresolved. The faint reflection echoes earn limited optical credit.

Muse Spark Open

The airborne black blob and deformed paint support the broad contact sequence, although cyan attachment and wheel-directed transport remain partial. The sphere and black blob have substantial framing errors. The dominant limitation is the largely absent mirror system: faint wall circles and isolated highlights provide little evidence of recursive room geometry or curved nested reflections. Oversized compact paint features and diffuse material treatment further limit credit.

Score breakdown

CategoryGlyph ClusterMuse Spark Open
State at 600 ms5.0/2514.0/25
Camera and placement3.0/156.0/15
Reflections8.0/1208.0/120
Materials and scale3.0/103.5/10
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

Glyph Cluster

A charming palette and three expressive companions make the concept recognizable. The dominant paper enclosure overwhelms the small group, the plum character lacks a clear brace silhouette, and the cuddle remains difficult to trace. Sparse furnishings, ambiguous folds and generalized shading limit the promised lived-in richness and tactile depth.

Muse Spark Open

The rounded silhouette and asymmetric expression make an appealing baby elephant, supported by a quiet background and grounding shadow. The protective action remains difficult to read: forefeet cannot be confidently traced into a grip, and seed contact is crowded by fine lines. Controlled simple shapes provide charm, but limited anatomical clarity, shading and surface detail leave the execution uneven.

Score breakdown

CategoryGlyph ClusterMuse Spark Open
Task & likeness3.5/105.0/10
Anatomy & construction2.5/104.5/10
Space & placement4.0/106.0/10
Light & reflections3.5/105.0/10
Purposeful detail4.5/106.0/10
Artistry & character3.0/105.0/10
Materials & effects2.0/105.0/10
Visual integrity3.0/106.5/10

Benchmark task

Glyph Cluster

Punctuation-shaped companions gather inside a curled paper home. The scene tests expressive silhouettes, close interaction and the coherence of a detailed miniature environment.

Muse Spark Open

A small elephant protecting a delicate seed tests expressive anatomy, physical contact and contrasting organic materials.

Mona Lisa

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

Glyph Cluster

The portrait has a continuous body silhouette, attached sleeves and hands, and simple landscape depth. Its oversized pale head enclosure nearly erases the expression, while separated fists, ochre clothing and frontal construction weaken Mona Lisa likeness. Sparse detail, flat materials and ambiguous facial layers leave the drawing seriously unresolved.

Muse Spark Open

A recognizable, orderly interpretation with clean major contours, connected body forms and modest facial shading. Wide eyes, frontal symmetry and schematic hands limit likeness and expression. Layered scenery establishes basic depth, but shallow arm overlaps, flat clothing and sparse fine detail keep the execution basic and uneven.

Score breakdown

CategoryGlyph ClusterMuse Spark Open
Task & likeness2.0/103.0/10
Anatomy & construction0.5/103.0/10
Space & placement2.0/105.0/10
Light & reflections1.0/104.5/10
Purposeful detail1.0/104.0/10
Artistry & character0.5/103.0/10
Materials & effects1.0/104.0/10
Visual integrity3.0/106.0/10

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

Glyph Cluster

A cheerful, recognizable beach illustration with playful accessories and mostly clean silhouettes. Sunset colors and soft glow supply atmosphere, but abbreviated anatomy, unexplained airborne animals, weak ground contact and absent water reflections limit physical coherence. Small details add interest without consistently resolving construction or materials.

Muse Spark Open

A coherent sunset beach with readable activities, balanced framing and controlled colour transitions. Small accessories add interest, but schematic anatomy, limited surface detail, weak directional shadows and a geometric reflection constrain its finish. Most shapes and overlaps remain clean.

Score breakdown

CategoryGlyph ClusterMuse Spark Open
Task & likeness6.0/108.0/10
Anatomy & construction4.0/106.0/10
Space & placement5.0/106.5/10
Light & reflections4.0/105.5/10
Purposeful detail5.5/106.5/10
Artistry & character4.0/105.5/10
Materials & effects4.0/106.0/10
Visual integrity5.0/108.0/10

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

Glyph Cluster

This benchmark has not been assessed yet.

Muse Spark Open

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

Glyph Cluster

Recognizable animals and clean shapes give the scene charm, but the requested steering action is visibly incomplete. Simplified joints, weak vehicle construction and uncertain water contact limit physical coherence. Flat lighting, sparse functional detail and a small focal group keep the illustration basic despite its tidy edges.

Muse Spark Open

Expressive faces, distinct accessories and clean color separation make the scene appealing and recognizable. Character detail is stronger than the functional construction: steering contact, limb overlaps and seating remain ambiguous. The readable hull and lively spray establish motion, while limited directional shading and simplified surfaces constrain depth and physical coherence.

Score breakdown

CategoryGlyph ClusterMuse Spark Open
Task & likeness5.0/104.0/10
Anatomy & construction3.0/103.0/10
Space & placement4.0/106.0/10
Light & reflections2.5/104.5/10
Purposeful detail3.5/107.0/10
Artistry & character3.0/103.5/10
Materials & effects3.0/105.0/10
Visual integrity5.5/105.0/10

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

Glyph Cluster

A readable cartoon with open framing, aligned bicycle wheels and modest atmospheric effects. Pelican likeness is approximate, while the narrow neck, crowded feet, absent steering contact and unclear drivetrain weaken the riding action. Clean shapes help presentation, but shallow space and inconsistent shading limit the finish.

Muse Spark Open

A controlled, appealing cartoon with a recognizable pelican, expressive face and clean curved forms. Feather lines, spokes and bill shading provide useful complexity. Aligned wheels and a ground shadow establish placement, but uncertain pedal contacts and obscured mechanical connections weaken support and riding action. Lighting remains loosely coordinated with the sun.

Score breakdown

CategoryGlyph ClusterMuse Spark Open
Task & likeness6.0/107.5/10
Anatomy & construction3.0/105.0/10
Space & placement6.0/106.0/10
Light & reflections3.5/105.0/10
Purposeful detail4.0/106.5/10
Artistry & character3.0/105.5/10
Materials & effects4.5/106.0/10
Visual integrity6.0/107.5/10

Benchmark task

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