STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Inkling-Small vs GLM-5.3-Flash

GLM-5.3-Flash leads Inkling-Small by 20.9 points on StealthMark, 48.5 to 27.6. It leads on 8 of 9 benchmarks, including Foresight, and Inkling-Small on 1, including Latch. Ox Alpha scores higher on Ground Truth.

See the difference ↘
All results ↗
Model guide ↗

Overall StealthMark

27.6/100Overall rank 43/53
48.5/100Overall rank 19/53

General Intelligence

25.5/100
42.3/100

Visual Intelligence

31.1/100
59.4/100

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
Local modelOpen model · MIT

BENCHMARK BY BENCHMARK

Where each model leads

  • Inkling-Small
  • GLM-5.3-Flash
  • Other models
  • Median

DATASHEET

Specs and pricing

Both take about 1M tokens of context.

  • Inkling-Small
  • GLM-5.3-Flash
  • Other models
  • Median
PricePer 1M output tokens, input below
Inkling-Small: No list priceGLM-5.3-Flash: $0.50$0.15 input
Context windowTokens per request, max output below
Inkling-Small: 1MTiedGLM-5.3-Flash: 1MTied131K max output
Output speedTokens per second, our measurement
Inkling-Small: Not measuredGLM-5.3-Flash: 89tokens/s
SizeTotal and active parameters
Inkling-Small: 276B12B activeGLM-5.3-Flash: 320B18B active
Developer
Thinking Machines LabZ.AI
Released
Not published26 Aug 2026
Input → output
Text, image, audio → textText, image → 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 audioHybrid sparse and linear attention MoE

Full datasheets, every price and sourceInkling-Small ↗GLM-5.3-Flash ↗

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

GLM-5.3-Flash 47.0/100Rank 20/49

Survived 1 of 3
Foresight: complete playing field
Level 316 ptsTurn 20 / 20

Points per level

LevelInkling-SmallGLM-5.3-Flash
Level 1Second Thoughts
9 ptsOut of lives
9 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
8 ptsOut of lives
16 ptsSurvived

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

GLM-5.3-Flash 4.0/100Rank 50/503 of 5 levels

3 of 5 played
Latch: complete playing field
Level 30.6 ptsTurn 33 / 36

Points per level

LevelInkling-SmallGLM-5.3-Flash
Level 1Hold the door
5.2 ptsCleared
4.4 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
5.2 ptsFinished early
Level 3Relay vault
2.8 ptsFinished early
0.6 ptsFinished early
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.

GLM-5.3-Flash

The setup is recognizable, but the paint interaction remains poorly established and off-center. The first wall and floor images provide coherent placement, scale, silhouette and occlusion cues, with faint lower echoes. Missing receding chains, nested imagery and ordered emitter mappings leave the reflection system heavily simplified. Dull shading does not convincingly depict polished steel or mirrors.

Score breakdown

CategoryInkling-SmallGLM-5.3-Flash
State at 600 ms14.0/2514.0/25
Camera and placement3.0/159.0/15
Reflections8.0/12021.5/120
Materials and scale2.5/103.5/10
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

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.

GLM-5.3-Flash

The expressive emerald face, ivory horns, gold accents and fine veining closely match the brief. Rounded volumes and layered shading create an appealing mascot. Rear hoof placement is cramped, lighting is somewhat inconsistent, and conspicuous white patches behind the muzzle interrupt the finish. Surfaces remain visibly stylized rather than photographic.

Score breakdown

CategoryInkling-SmallGLM-5.3-Flash
Task & likeness2.5/108.5/10
Anatomy & construction1.5/107.5/10
Space & placement3.5/107.5/10
Light & reflections3.0/108.0/10
Purposeful detail4.5/107.5/10
Artistry & character3.0/107.5/10
Materials & effects3.5/107.5/10
Visual integrity2.0/107.0/10

Benchmark task

Inkling-Small

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

GLM-5.3-Flash

A rounded jade bull raising a hoof tests anatomy, balance and the appearance of polished stone and metal.

Mona Lisa

Different 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.

GLM-5.3-Flash

The crossed arms, green dress and hazy landscape clearly evoke Mona Lisa. Replication is limited by the frontal pose, oversized eyes, elongated face and pronounced lips. Overlapping finger strips lack convincing knuckles and palm volume. The balanced framing and soft shading provide cohesion, but simplified anatomy, repetitive folds and blurred scenery keep the portrait basic.

Score breakdown

CategoryInkling-SmallGLM-5.3-Flash
Task & likeness2.5/104.5/10
Anatomy & construction2.5/104.5/10
Space & placement3.0/106.0/10
Light & reflections2.5/106.0/10
Purposeful detail2.0/105.0/10
Artistry & character2.5/105.0/10
Materials & effects2.0/105.5/10
Visual integrity3.0/104.0/10

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

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.

GLM-5.3-Flash

Framing palms, a vivid sunset palette and balanced kite and umbrella create an appealing beach illustration. Layered water and shoreline give the scene depth, while aligned reflections reinforce the sunset. Small accessories add character and reward inspection. Figures and animals remain schematic, some overlaps are difficult to read, and simplified shadows and flat surfaces limit physical richness.

Score breakdown

CategoryInkling-SmallGLM-5.3-Flash
Task & likeness3.5/108.0/10
Anatomy & construction3.0/107.0/10
Space & placement3.0/108.0/10
Light & reflections3.0/108.0/10
Purposeful detail3.0/108.0/10
Artistry & character3.0/108.5/10
Materials & effects2.5/106.5/10
Visual integrity2.0/108.0/10

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

Inkling-Small

This benchmark has not been assessed yet.

GLM-5.3-Flash

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

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.

GLM-5.3-Flash

Recognizable animals, a supported riding pose and an energetic diagonal composition make the scene readable. Character details and spray strengthen its appeal. Simple limb construction, limited directional lighting and an unresolved steering connection constrain the drawing's physical precision and complexity.

Score breakdown

CategoryInkling-SmallGLM-5.3-Flash
Task & likeness4.0/107.0/10
Anatomy & construction3.0/105.0/10
Space & placement4.0/106.0/10
Light & reflections5.0/105.0/10
Purposeful detail5.5/106.5/10
Artistry & character4.0/104.0/10
Materials & effects5.0/106.0/10
Visual integrity5.0/106.0/10

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

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.

GLM-5.3-Flash

The pelican, bicycle and seaside setting form a clear, appealing illustration. Circular wheels, readable frame tubes and clean silhouettes support the action. The legs connect to the body, but the far foot's pedal contact and wing-to-handlebar junction are cramped. Simple shading, uniform wave marks and limited surface texture keep the rendering relatively flat.

Score breakdown

CategoryInkling-SmallGLM-5.3-Flash
Task & likeness4.0/108.5/10
Anatomy & construction3.0/107.5/10
Space & placement3.0/107.5/10
Light & reflections3.0/106.5/10
Purposeful detail4.5/107.0/10
Artistry & character5.0/108.0/10
Materials & effects4.5/106.5/10
Visual integrity3.0/108.0/10

Benchmark task

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