STEALTHMARK · HEAD TO HEAD

All comparisons ↗

MAI-Thinking-1 vs Muse Spark Open

Muse Spark Open leads MAI-Thinking-1 by 30.0 points on StealthMark, 44.1 to 14.1. It leads on all 9 benchmarks. Muse Spark Open scores higher on Ground Truth.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

14.1/100Overall rank 51/53
44.1/100Overall rank 29/53

General Intelligence

7.4/100
42.6/100

Visual Intelligence

24.6/100
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

  • MAI-Thinking-1Single-step reasoning not measured
  • Muse Spark Open

Open or local

BENCHMARK BY BENCHMARK

Where each model leads

  • MAI-Thinking-1
  • Muse Spark Open
  • Other models
  • Median

DATASHEET

Specs and pricing

Muse Spark Open scores higher on StealthMark, is 1.9× cheaper per output token, takes 4.1× more context and runs 3.9× faster in our speed test.

  • MAI-Thinking-1
  • Muse Spark Open
  • Other models
  • Median
PricePer 1M output tokens, input below
MAI-Thinking-1: $8$2 inputMuse Spark Open: $4.251.9× cheaper$1.25 input
Context windowTokens per request, max output below
MAI-Thinking-1: 256K64K max outputEstimatedMuse Spark Open: 1M4.1× larger1M max output
Output speedTokens per second, our measurement
MAI-Thinking-1: 93tokens/sMuse Spark Open: 3613.9× fastertokens/s
SizeTotal and active parameters
MAI-Thinking-1: 1T35B activeEstimatedMuse Spark Open: 816B42B active
Developer
Microsoft AIMeta
Released
12 Aug 202615 Oct 2026
Origin
United StatesBoth
Input → output
Text → textText, image, audio, video → text
Architecture
Sparse Mixture-of-Experts (MoE)Sparse 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 sourceMAI-Thinking-1 ↗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.

MAI-Thinking-1 6.4/100Rank 44/47

Survived 0 of 3
Foresight: complete playing field
Level 31 ptsTurn 8 / 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

LevelMAI-Thinking-1Muse 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
1 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.

MAI-Thinking-1 3.6/100Rank 44/48

Cleared 1 of 5
Latch: complete playing field
Level 511.8 ptsTurn 16 / 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

LevelMAI-Thinking-1Muse Spark Open
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
2 ptsOut of turns
9.8 ptsCleared
Level 3Relay vault
2.2 ptsFinished early
19.2 ptsCleared
Level 4Passing bay
3 ptsFinished early
17.8 ptsClearedFinished early · 1 beacon left
Level 5Second thoughts
11.8 ptsFinished early
19.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

MAI-Thinking-1

The small paint features and convex shading deserve moderate material credit. The sphere remains undersized and low, with black unusually close to its apex. Crimson and cyan do not establish the required impact histories. Faint reflected echoes supply limited optical evidence, while the defining recursive room, nested sphere and emitter structures remain unestablished.

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

CategoryMAI-Thinking-1Muse Spark Open
State at 600 ms3.0/2514.0/25
Camera and placement2.5/156.0/15
Reflections4.0/1208.0/120
Materials and scale2.0/103.5/10
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

MAI-Thinking-1

A recognizable lantern-and-moth illustration with appealing coloured wings and tidy outer contours. Simple construction, a small focal subject and crowded overlaps limit character and depth. The face, six-leg anatomy, seedling and antenna-driven watering joke remain insufficiently readable.

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

CategoryMAI-Thinking-1Muse Spark Open
Task & likeness4.0/105.0/10
Anatomy & construction4.5/104.5/10
Space & placement5.0/106.0/10
Light & reflections4.5/105.0/10
Purposeful detail4.0/106.0/10
Artistry & character5.0/105.0/10
Materials & effects5.0/105.0/10
Visual integrity6.0/106.5/10

Benchmark task

MAI-Thinking-1

A fluffy moth tends a lantern greenhouse amid a gardening mishap. The scene tests insect anatomy, expressive action, translucent wings and the interaction of light with small objects.

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

MAI-Thinking-1

A recognizable Mona Lisa motif emerges from dark hair, a pale face and a landscape band. Replication remains weak: the oversized frontal head, broad smile, unresolved torso and missing crossed-hand anatomy diverge substantially from the reference. Simple fills and sparse strokes provide limited volume, material definition or painterly complexity.

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

CategoryMAI-Thinking-1Muse Spark Open
Task & likeness1.0/103.0/10
Anatomy & construction0.5/103.0/10
Space & placement1.0/105.0/10
Light & reflections1.5/104.5/10
Purposeful detail1.0/104.0/10
Artistry & character1.5/103.0/10
Materials & effects0.5/104.0/10
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

MAI-Thinking-1

A coherent, cheerful beach scene with balanced placement, clean shapes and controlled sunset colours. Animals, birds and playful accessories are recognizable, but basic dolphin construction, weak grounding, schematic reflections and sparse material detail limit the drawing's accomplishment.

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

CategoryMAI-Thinking-1Muse 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 detail4.5/106.5/10
Artistry & character4.0/105.5/10
Materials & effects3.5/106.0/10
Visual integrity4.5/108.0/10

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

MAI-Thinking-1

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

MAI-Thinking-1

The recognizable raccoon and clean, shaded forms make a readable cartoon. The dog's steering remains undemonstrated, while ambiguous seating contacts and a minimally constructed craft weaken the central interaction. Controlled gradients and edges deserve credit, but anatomy, purposeful detail and water displacement remain basic.

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

CategoryMAI-Thinking-1Muse Spark Open
Task & likeness3.0/104.0/10
Anatomy & construction2.0/103.0/10
Space & placement5.0/106.0/10
Light & reflections3.5/104.5/10
Purposeful detail3.0/107.0/10
Artistry & character2.5/103.5/10
Materials & effects3.5/105.0/10
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

MAI-Thinking-1

A recognizable pelican and bicycle combine clean rounded forms, expressive facial details and effective surface shading. Aligned wheels and soft shadows establish placement, but unresolved pedal engagement, absent steering contact and sparse drivetrain construction weaken the riding action. Limited feather complexity and shallow space constrain an otherwise appealing illustration.

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

CategoryMAI-Thinking-1Muse Spark Open
Task & likeness7.0/107.5/10
Anatomy & construction4.5/105.0/10
Space & placement5.5/106.0/10
Light & reflections7.0/105.0/10
Purposeful detail5.0/106.5/10
Artistry & character5.0/105.5/10
Materials & effects4.5/106.0/10
Visual integrity7.0/107.5/10

Benchmark task

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