STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Grok 4.7 vs Muse Spark Open

Grok 4.7 leads Muse Spark Open by 3.1 points on StealthMark, 47.2 to 44.1. Muse Spark Open leads on 6 of 9 benchmarks, including Latch, and Grok 4.7 on 3, including Foresight. Grok 4.7 scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

47.2/100Overall rank 22/53
44.1/100Overall rank 29/53

General Intelligence

48.4/100
42.6/100

Visual Intelligence

44.8/100
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

  • Grok 4.7
  • Muse Spark Open

Open or local

BENCHMARK BY BENCHMARK

Where each model leads

  • Grok 4.7
  • Muse Spark Open
  • Other models
  • Median

DATASHEET

Specs and pricing

Grok 4.7 scores higher on StealthMark. Muse Spark Open is 41% cheaper per output token, takes 2.1× more context and runs 1.9× faster in our speed test.

  • Grok 4.7
  • Muse Spark Open
  • Other models
  • Median
PricePer 1M output tokens, input below
Grok 4.7: $6$2 inputMuse Spark Open: $4.2541% cheaper$1.25 input
Context windowTokens per request, max output below
Grok 4.7: 500KMuse Spark Open: 1M2.1× larger1M max output
Output speedTokens per second, our measurement
Grok 4.7: 185tokens/sMuse Spark Open: 3611.9× fastertokens/s
SizeTotal and active parameters
Grok 4.7: Not disclosedMuse Spark Open: 816B42B active
Developer
SpaceXAIMeta
Released
21 Sep 202615 Oct 2026
Origin
United StatesBoth
Input → output
Text, image → textText, 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 sourceGrok 4.7 ↗Muse 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.

Grok 4.7 72.6/100Rank 3/47

Survived 3 of 3
Foresight: complete playing field
Level 316 ptsTurn 20 / 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

LevelGrok 4.7Muse Spark Open
Level 1Second Thoughts
25 ptsSurvived
4 ptsOut of lives
Level 2Pressure Pot
13 ptsSurvived
9 ptsOut of lives
Level 3Hide or Flight
16 ptsSurvived
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.

Grok 4.7 65.4/100Rank 18/48

Cleared 4 of 5
Latch: complete playing field
Level 520.4 ptsTurn 28 / 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

LevelGrok 4.7Muse Spark Open
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
11.6 ptsFinished early
19.2 ptsCleared
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
17.8 ptsClearedFinished early · 1 beacon left
Level 5Second thoughts
20.4 ptsCleared
19.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Grok 4.7

Some sphere reflections are correctly placed, with useful size progression and a floor image. Their overlapping side continuations and inverted floor paint order provide additional local optical cues. The gross paint sequence is recognizable, although crimson is a little too low. Incorrect lamp projections and absent nested and receding imagery still leave the mirror system largely incomplete.

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

CategoryGrok 4.7Muse Spark Open
State at 600 ms23.0/2514.0/25
Camera and placement12.5/156.0/15
Reflections26.0/1208.0/120
Materials and scale6.5/103.5/10
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

Grok 4.7

The bold spiral dominates an appealing, restrained silhouette, with crisp angular turns and subtle charcoal highlights. However, a visible background gap separates the shell from the body, making the shell appear suspended. The connected head and delicate eye stalks read clearly, while shading and small features remain simple.

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

CategoryGrok 4.7Muse Spark Open
Task & likeness7.0/105.0/10
Anatomy & construction5.0/104.5/10
Space & placement5.5/106.0/10
Light & reflections4.0/105.0/10
Purposeful detail2.5/106.0/10
Artistry & character3.5/105.0/10
Materials & effects2.5/105.0/10
Visual integrity7.5/106.5/10

Benchmark task

Grok 4.7

A dark snail with a geometric spiral shell tests silhouette, curved construction and restrained material shading.

Muse Spark Open

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

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Grok 4.7

Dark clothing, overlapping hands and a restrained smile make the reference recognizable. The broad frontal face, elongated neck and oversized head weaken likeness and anatomical proportion; rounded hands lack convincing fingers. Gentle facial shading suggests volume, while clothing and landscape remain flat. Angular veil overlaps and a hard horizontal background boundary weaken the finish.

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

CategoryGrok 4.7Muse Spark Open
Task & likeness2.0/103.0/10
Anatomy & construction2.0/103.0/10
Space & placement3.0/105.0/10
Light & reflections1.5/104.5/10
Purposeful detail3.0/104.0/10
Artistry & character2.5/103.0/10
Materials & effects2.0/104.0/10
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

Different task instructions

Creativity, perspective and visual beauty.

The judgment

Grok 4.7

The warm sunset, blue water and scattered beach activities create a cheerful, readable composition. Animals and equipment use basic silhouettes, with limited anatomical detail and grounding. The sun reflection forms a rigid tapered strip, and foreground objects lack cast shadows. Clean shapes support the illustration, but depth, materials and drawing complexity remain modest.

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

CategoryGrok 4.7Muse Spark Open
Task & likeness7.5/108.0/10
Anatomy & construction4.5/106.0/10
Space & placement5.5/106.5/10
Light & reflections6.0/105.5/10
Purposeful detail5.0/106.5/10
Artistry & character3.5/105.5/10
Materials & effects4.5/106.0/10
Visual integrity6.0/108.0/10

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

Grok 4.7

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

Different task instructions

Scene composition and interacting subjects.

The judgment

Grok 4.7

The raccoon rides clearly on the dog's back, and expressive faces, bright colors and a readable orange hull create a playful composition. Steering is unresolved: the dog's visible paws rest on the deck rather than grasping the controls. Simple body shapes and ribbonlike wake limit construction and movement. The glowing sun produces little corresponding illumination or reflection.

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

CategoryGrok 4.7Muse Spark Open
Task & likeness7.0/104.0/10
Anatomy & construction4.5/103.0/10
Space & placement6.5/106.0/10
Light & reflections4.5/104.5/10
Purposeful detail5.5/107.0/10
Artistry & character5.5/103.5/10
Materials & effects5.5/105.0/10
Visual integrity3.5/105.0/10

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

Different task instructions

Subject construction and spatial relationships.

The judgment

Grok 4.7

The pelican reads clearly through its long bill, throat pouch and curved neck. Clean pastel shapes and balanced scenery make an appealing illustration. The riding mechanism is less convincing: feet lack clear pedal contact, steering is unresolved, and the frame lacks a coherent drivetrain. Simple shading and sparse feather detail limit depth and 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

CategoryGrok 4.7Muse Spark Open
Task & likeness7.5/107.5/10
Anatomy & construction4.5/105.0/10
Space & placement6.5/106.0/10
Light & reflections6.0/105.0/10
Purposeful detail6.0/106.5/10
Artistry & character5.5/105.5/10
Materials & effects5.5/106.0/10
Visual integrity6.0/107.5/10

Benchmark task

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