Muse Spark Open 29.4/100Rank 34/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Muse Spark Open leads Qwen3.5-9B by 33.6 points on StealthMark, 44.1 to 10.5. It leads on all 9 benchmarks. Muse Spark Open scores higher on Ground Truth.
See the difference ↘On every task, result quality and reasoning tokens are each compared with all measured models and weighed equally. Each dot is one model.
BENCHMARK BY BENCHMARK
DATASHEET
Muse Spark Open scores higher on StealthMark and runs 2.2× faster in our speed test. Qwen3.5-9B is 17× cheaper per output token. Both take about 1M tokens of context.
Full datasheets, every price and sourceMuse Spark Open ↗Qwen3.5-9B ↗
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.


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.


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


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.
Qwen3.5-9B
Horizontal centering and a separate airborne black blob are visible. Cyan's recent contact and crimson's forward transport are insufficiently demonstrated, while sphere support remains obscured. The enlarged, lowered sphere substantially changes the composition. The wall and floor sphere images, recursive room structure and curved emitter mappings are almost entirely missing.
| Category | Muse Spark Open | Qwen3.5-9B |
|---|---|---|
| State at 600 ms | 14.0/25 | 3.0/25 |
| Camera and placement | 6.0/15 | 4.5/15 |
| Reflections | 8.0/120 | 2.0/120 |
| Materials and scale | 3.5/10 | 3.0/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 |
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Visual construction and creative interpretation.


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.
Qwen3.5-9B
Glowing teal spheres and a harmonious palette provide visible strengths, but the central character remains seriously unresolved. A large gap separates head and torso, limbs cannot be traced, and scattered garment shapes fail to establish the ornate costume. The foreground mound replaces the tall enclosing arch. Clean primitive edges do not repair these construction failures.
| Category | Muse Spark Open | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 5.0/10 | 3.0/10 |
| Anatomy & construction | 4.5/10 | 2.0/10 |
| Space & placement | 6.0/10 | 3.0/10 |
| Light & reflections | 5.0/10 | 3.5/10 |
| Purposeful detail | 6.0/10 | 2.0/10 |
| Artistry & character | 5.0/10 | 2.0/10 |
| Materials & effects | 5.0/10 | 4.0/10 |
| Visual integrity | 6.5/10 | 3.0/10 |
Muse Spark Open
A small elephant protecting a delicate seed tests expressive anatomy, physical contact and contrasting organic materials.
Qwen3.5-9B
A floating capybara in ornate robes tests character anatomy, layered fabric and the placement of surrounding luminous forms.
Precise visual recall and portrait reconstruction.


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.
Qwen3.5-9B
A centered dark oval with sparse facial marks forms a simple graphic face, but scarcely replicates the Mona Lisa. The portrait's body, crossed hands, clothing and landscape are missing, while angular facial construction and flat tones lose its likeness, volume and subtle expression.
| Category | Muse Spark Open | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 3.0/10 | 0.0/10 |
| Anatomy & construction | 3.0/10 | 0.0/10 |
| Space & placement | 5.0/10 | 0.0/10 |
| Light & reflections | 4.5/10 | 0.0/10 |
| Purposeful detail | 4.0/10 | 0.0/10 |
| Artistry & character | 3.0/10 | 0.5/10 |
| Materials & effects | 4.0/10 | 0.0/10 |
| Visual integrity | 6.0/10 | 0.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


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.
Qwen3.5-9B
The beach is recognizable, and sweeping shoreline curves provide basic rhythm. Wildlife and playful activity remain poorly resolved, with ambiguous body construction and object contact. The sun glows without corresponding reflections or surface lighting. Fragmented subjects and an unintegrated rectangular panel substantially weaken composition and finish.
| Category | Muse Spark Open | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 8.0/10 | 1.5/10 |
| Anatomy & construction | 6.0/10 | 0.5/10 |
| Space & placement | 6.5/10 | 1.5/10 |
| Light & reflections | 5.5/10 | 1.0/10 |
| Purposeful detail | 6.5/10 | 2.5/10 |
| Artistry & character | 5.5/10 | 1.5/10 |
| Materials & effects | 6.0/10 | 0.5/10 |
| Visual integrity | 8.0/10 | 1.5/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


Muse Spark Open
This benchmark has not been assessed yet.
Qwen3.5-9B
This benchmark has not been assessed yet.
A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.
Scene composition and interacting subjects.


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.
Qwen3.5-9B
Bright colors, clean individual shapes and basic animal cues make the scene partly recognizable. Back seating, body continuity, steering and jet ski construction remain unresolved. Background gradients and wave rhythm provide some finish, but substantial anatomical, spatial and interaction weaknesses dominate.
| Category | Muse Spark Open | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 4.0/10 | 2.5/10 |
| Anatomy & construction | 3.0/10 | 1.0/10 |
| Space & placement | 6.0/10 | 2.0/10 |
| Light & reflections | 4.5/10 | 1.0/10 |
| Purposeful detail | 7.0/10 | 1.5/10 |
| Artistry & character | 3.5/10 | 1.0/10 |
| Materials & effects | 5.0/10 | 1.0/10 |
| Visual integrity | 5.0/10 | 2.5/10 |
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.
Subject construction and spatial relationships.


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.
Qwen3.5-9B
The oversized bill and orderly spoked wheels make the subject partly recognizable. Clean contours and strong color contrast provide graphic clarity, but unresolved appendages, steering, drivetrain and support dominate the construction. Sparse shading and detail further limit the illustration.
| Category | Muse Spark Open | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 7.5/10 | 4.0/10 |
| Anatomy & construction | 5.0/10 | 1.5/10 |
| Space & placement | 6.0/10 | 3.0/10 |
| Light & reflections | 5.0/10 | 1.5/10 |
| Purposeful detail | 6.5/10 | 2.5/10 |
| Artistry & character | 5.5/10 | 1.5/10 |
| Materials & effects | 6.0/10 | 1.5/10 |
| Visual integrity | 7.5/10 | 2.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.