STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GLM-5.3 vs Iceman Contributor

GLM-5.3 leads Iceman Contributor by 25.9 points on StealthMark, 45.1 to 19.2. It leads on all 9 benchmarks. GLM-5.3 scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.

See the difference ↘
All results ↗
Model guide ↗

Overall StealthMark

45.1/100Overall rank 27/53
19.2/100Overall rank 47/53

General Intelligence

37.6/100
11.7/100

Visual Intelligence

57.2/100
31.0/100

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

Open or local

Open modelGLM-5.3 License

BENCHMARK BY BENCHMARK

Where each model leads

  • GLM-5.3
  • Iceman Contributor
  • Other models
  • Median

DATASHEET

Specs and pricing

GLM-5.3 scores higher on StealthMark and runs 1.9× faster in our speed test.

  • GLM-5.3
  • Iceman Contributor
  • Other models
  • Median
PricePer 1M output tokens, input below
GLM-5.3: $4.40$1.40 inputIceman Contributor: No list price
Context windowTokens per request, max output below
GLM-5.3: 1M128K max outputIceman Contributor: Not published
Output speedTokens per second, our measurement
GLM-5.3: 861.9× fastertokens/sIceman Contributor: 46tokens/s
SizeTotal and active parameters
GLM-5.3: 753BAll activeIceman Contributor: Not disclosed
Developer
Z.AINot published
Released
17 Aug 2026Not published
Origin
ChinaNot published
Input → output
Text → textNot published
Architecture
GLM MoE with DSA sparse attentionNot published

Full datasheets, every price and sourceGLM-5.3 ↗

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.

GLM-5.3 59.1/100Rank 22/472 of 3 levels

2 of 3 played
Foresight: complete playing field
Level 26 ptsTurn 10 / 18

Iceman Contributor 3.2/100Rank 47/47

Survived 0 of 3
Foresight: complete playing field
Level 31 ptsTurn 7 / 20

Points per level

LevelGLM-5.3Iceman Contributor
Level 1Second Thoughts
27 ptsSurvived
0 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
3 ptsOut of lives
Level 3Hide or Flight
Pending
1 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.

GLM-5.3 25.6/100Rank 37/48

Cleared 2 of 5
Latch: complete playing field
Level 512.2 ptsTurn 14 / 40

Iceman Contributor 3.6/100Rank 44/48

Cleared 1 of 5
Latch: complete playing field
Level 55 ptsTurn 25 / 40

Points per level

LevelGLM-5.3Iceman Contributor
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9 ptsCleared
2.8 ptsFinished early
Level 3Relay vault
7.6 ptsFinished early
2.2 ptsFinished early
Level 4Passing bay
3.2 ptsFinished early
4 ptsFinished early
Level 5Second thoughts
12.2 ptsFinished early
5 ptsFinished early

Newton's Mirror

Same task instructions

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

The judgment

GLM-5.3

The sphere has readable rounded volume, and the compact black blob remains distinctly above it, supporting pre-impact separation. The extensive red and cyan coatings do not establish the required interaction history or paint scale. The sphere and black are substantially displaced downward. A centered upper panel, paired side patches and a vertically aligned partial floor image provide limited reflection cues, but ordered mirror-room repetitions and curved spherical imagery are largely missing.

Iceman Contributor

The image provides limited evidence through rounded volume, faint wall strips and floor echoes. Its main sphere is small and low, the paint beads do not establish the required interaction history, and most of the defining mirror structure is missing.

Score breakdown

CategoryGLM-5.3Iceman Contributor
State at 600 ms9.0/250.5/25
Camera and placement9.0/152.5/15
Reflections10.0/1207.5/120
Materials and scale7.0/103.0/10
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

GLM-5.3

A luminous organic creature meets a geometric reflection in a carefully framed oval mirror. Shared glowing cores and fingertip contact make the introspective symbolism clear. Gold, cream and blue establish a controlled hierarchy. The creature’s lower anatomy and shoulder transition remain loosely defined, while ground contact and reflected depth are mostly symbolic. Elegant vector illustration rather than photographic rendering.

Iceman Contributor

The crystal crown, cyan eyes and blue faceting communicate an icy fantasy character. Anatomical readability is substantially weaker: the ringed torso, crowded facial construction and fingerless appendages do not resolve the requested childlike crouch or pouncing gesture. Sparse surface detail and shallow shading further limit the result.

Score breakdown

CategoryGLM-5.3Iceman Contributor
Task & likeness9.0/104.0/10
Anatomy & construction7.0/103.0/10
Space & placement7.0/104.0/10
Light & reflections8.0/104.5/10
Purposeful detail8.0/104.0/10
Artistry & character7.0/104.5/10
Materials & effects7.5/104.5/10
Visual integrity8.0/104.0/10

Benchmark task

GLM-5.3

An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.

Iceman Contributor

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

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

GLM-5.3

Recognizable Mona Lisa motifs include the dark veil, restrained smile, folded hands and muted landscape. Clean silhouettes and balanced framing support the portrait, but the frontal symmetry, elongated face, minimally articulated hands and broad background bands make the replication basic. Facial shading offers some volume; clothing and landscape remain mostly flat.

Iceman Contributor

The portrait retains a dark silhouette against an earthy landscape, but replication is weak. The frontal body, elongated facial proportions and undifferentiated hands lose the reference's defining pose and likeness. Basic gradients and layered hills provide some coherence, with little anatomical or painterly detail.

Score breakdown

CategoryGLM-5.3Iceman Contributor
Task & likeness3.0/101.5/10
Anatomy & construction2.0/101.5/10
Space & placement3.0/102.5/10
Light & reflections4.5/102.0/10
Purposeful detail3.0/102.0/10
Artistry & character2.5/102.0/10
Materials & effects3.5/102.0/10
Visual integrity4.0/103.0/10

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

GLM-5.3

A cohesive, colorful beach illustration with an inviting sunset, readable animals and playful foreground objects. Crisp silhouettes and small accessories reward inspection. Depth remains shallow, airborne dolphins lack convincing launch splashes, and several objects lack grounding shadows. The broad dark shape across the sun weakens the focal hierarchy.

Iceman Contributor

A coherent sunset beach with recognizable animals, playful details and effective palm framing. Connected silhouettes and layered scenery support modest construction and placement credit. Jointless figures, limited foreshortening and an inadequately separated sun and reflection keep the execution basic despite its attractive color.

Score breakdown

CategoryGLM-5.3Iceman Contributor
Task & likeness8.5/107.0/10
Anatomy & construction7.5/103.5/10
Space & placement7.0/106.0/10
Light & reflections7.0/104.0/10
Purposeful detail8.0/105.5/10
Artistry & character7.5/103.5/10
Materials & effects6.5/104.5/10
Visual integrity7.5/105.0/10

Benchmark task

A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.

Ground Truth

Different task instructions

Physical reasoning, light and visual reconstruction.

The judgment

GLM-5.3

This benchmark has not been assessed yet.

Iceman Contributor

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

GLM-5.3

The raccoon rides on the dog's back, and the dog reaches toward visible handlebars. Expressive faces and clean colors make the action readable. Overlapping paws and hindquarters weaken anatomical clarity, while the vehicle resembles a flat board with a thin steering post. The wake suggests motion, but water contact, shadows and reflections receive little development.

Iceman Contributor

The sunset palette and red hull establish an appealing setting, but the central interaction remains unresolved. Overlapping bodies obscure the dog, supported seating is unclear, and no readable paw-to-control grip demonstrates steering. Simple construction, weak environmental lighting and loosely described spray limit depth and finish.

Score breakdown

CategoryGLM-5.3Iceman Contributor
Task & likeness6.5/102.0/10
Anatomy & construction4.5/103.0/10
Space & placement5.5/103.0/10
Light & reflections4.0/104.0/10
Purposeful detail5.0/103.5/10
Artistry & character4.0/102.5/10
Materials & effects5.0/104.0/10
Visual integrity7.5/102.5/10

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

GLM-5.3

The expressive pelican, broad bill and clean coastal composition make the subject immediately readable. Both legs connect to the body and reach pedals, but the front wheel lacks a connected fork and the wings do not engage visible handlebars. Crisp spokes and feather lines add interest; flat lighting, absent ground shadows and a fish floating above the horizon weaken physical coherence.

Iceman Contributor

A recognizable pelican and bicycle sit within an appealing sunset composition. Feather contours, bill shape and atmospheric colour provide character, but disconnected-looking leg origins, unclear pedal contact and unresolved steering weaken the central riding action. Consistent wheel alignment establishes a side view without resolving the rider's support.

Score breakdown

CategoryGLM-5.3Iceman Contributor
Task & likeness7.5/104.0/10
Anatomy & construction4.0/103.5/10
Space & placement6.0/103.5/10
Light & reflections4.0/105.0/10
Purposeful detail6.5/104.5/10
Artistry & character6.5/103.5/10
Materials & effects5.0/104.0/10
Visual integrity5.5/103.0/10

Benchmark task

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