STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GLM-5.3 vs GPT-6.1 Terra Low

GLM-5.3 leads GPT-6.1 Terra Low by 3.8 points on StealthMark, 45.1 to 41.3. GPT-6.1 Terra Low leads on 5 of 9 benchmarks, including Latch, and GLM-5.3 on 4, including Foresight. GLM-5.3 scores higher on Ground Truth.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

45.1/100Overall rank 28/55
41.3/100Overall rank 35/55

General Intelligence

37.6/100
34.3/100

Visual Intelligence

57.2/100
53.1/100

Open or local

Open modelGLM-5.3 License

BENCHMARK BY BENCHMARK

Where each model leads

  • GLM-5.3
  • GPT-6.1 Terra Low
  • Other models
  • Median

DATASHEET

Specs and pricing

  • GLM-5.3
  • GPT-6.1 Terra Low
  • Other models
  • Median
PricePer 1M output tokens, input below
GLM-5.3: $4.40$1.40 inputGPT-6.1 Terra Low: No list price
Context windowTokens per request, max output below
GLM-5.3: 1M128K max outputGPT-6.1 Terra Low: Not published
Output speedTokens per second, our measurement
GLM-5.3: 86tokens/sGPT-6.1 Terra Low: Not measured
SizeTotal and active parameters
GLM-5.3: 753BAll activeGPT-6.1 Terra Low: 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 24/512 of 3 levels

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

GPT-6.1 Terra Low 36.1/100Rank 26/51

Survived 1 of 3
Foresight: complete playing field
Level 39 ptsTurn 20 / 20

Points per level

LevelGLM-5.3GPT-6.1 Terra Low
Level 1Second Thoughts
27 ptsSurvived
4 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
8 ptsOut of lives
Level 3Hide or Flight
Pending
9 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.

GLM-5.3 25.6/100Rank 41/52

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

GPT-6.1 Terra Low 62.4/100Rank 23/52

Cleared 4 of 5
Latch: complete playing field
Level 520.6 ptsTurn 27 / 40

Points per level

LevelGLM-5.3GPT-6.1 Terra Low
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9 ptsCleared
9.2 ptsCleared
Level 3Relay vault
7.6 ptsFinished early
18.8 ptsCleared
Level 4Passing bay
3.2 ptsFinished early
10.2 ptsFinished early
Level 5Second thoughts
12.2 ptsFinished early
20.6 ptsCleared

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.

GPT-6.1 Terra Low

Deformed colored paint and a separate airborne black body establish readable interaction history. Cyan has travelled too far, framing differs substantially, and the mirror system supplies only elementary bands and oval copies. Missing recursive geometry, nested spherical imagery and emitter mapping remain the dominant weaknesses.

Score breakdown

CategoryGLM-5.3GPT-6.1 Terra Low
State at 600 ms9.0/2522.0/25
Camera and placement9.0/154.0/15
Reflections10.0/12010.0/120
Materials and scale7.0/106.0/10
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.

GPT-6.1 Terra Low

Six attached outward-facing heads, delicate scales and soft ivory shading establish an orderly decorative motif. Separate paddle-shaped bodies replace the required interlocking loops and leave no enclosed central hexagon. Surface detail provides interest, but repeated simple forms, schematic faces and limited anatomical modeling constrain the result.

Score breakdown

CategoryGLM-5.3GPT-6.1 Terra Low
Task & likeness9.0/104.0/10
Anatomy & construction7.0/103.5/10
Space & placement7.0/104.5/10
Light & reflections8.0/105.5/10
Purposeful detail8.0/105.5/10
Artistry & character7.0/105.0/10
Materials & effects7.5/105.5/10
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.

GPT-6.1 Terra Low

A pale serpent woven into an interlocking knot tests connected anatomy, repeated structure and readable overlaps. Organic surface detail must work with the overall geometry.

Mona Lisa

Same 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.

GPT-6.1 Terra Low

A recognizable, coherent portrait with purposeful facial detail, warm local volume and layered scenery. The frontal pose, enlarged face, merged hands and shallow clothing construction substantially limit replication and drawing skill. The visible successes support retaining the current assessment.

Score breakdown

CategoryGLM-5.3GPT-6.1 Terra Low
Task & likeness3.0/105.0/10
Anatomy & construction2.0/104.5/10
Space & placement3.0/105.0/10
Light & reflections4.5/106.0/10
Purposeful detail3.0/105.0/10
Artistry & character2.5/105.5/10
Materials & effects3.5/105.0/10
Visual integrity4.0/106.0/10

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

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.

GPT-6.1 Terra Low

A coherent sunset scene demonstrates the beach, animals, birds and reflections. Flowing silhouettes, warm color transitions and intact attachments are its strongest properties. Simplified anatomy, the turtle's elevated viewing angle and symbolic surface effects constrain drawing complexity and physical depth.

Score breakdown

CategoryGLM-5.3GPT-6.1 Terra Low
Task & likeness8.5/108.0/10
Anatomy & construction7.5/105.5/10
Space & placement7.0/105.5/10
Light & reflections7.0/106.5/10
Purposeful detail8.0/106.0/10
Artistry & character7.5/105.0/10
Materials & effects6.5/105.5/10
Visual integrity7.5/107.5/10

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

GLM-5.3

This benchmark has not been assessed yet.

GPT-6.1 Terra Low

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

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.

GPT-6.1 Terra Low

Recognizable animals, a coherent craft and sweeping wake make an appealing cartoon. Basic limb construction, weakly demonstrated raccoon seating and limited shared perspective constrain the scene. Small identifying details work well, while lighting and materials remain broadly graphic.

Score breakdown

CategoryGLM-5.3GPT-6.1 Terra Low
Task & likeness6.5/106.5/10
Anatomy & construction4.5/105.0/10
Space & placement5.5/105.5/10
Light & reflections4.0/104.5/10
Purposeful detail5.0/106.0/10
Artistry & character4.0/105.0/10
Materials & effects5.0/105.0/10
Visual integrity7.5/106.0/10

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

Same 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.

GPT-6.1 Terra Low

A coherent coastal illustration with a distinctive pelican, controlled contours and clearly organised bicycle wheels. Visible saddle support and shaped neck and wing contours earn credit beyond basic geometric construction. Rubbery legs, unresolved pedal contacts and absent steering contact limit the riding action. Lighting and materials remain restrained and spatially shallow.

Score breakdown

CategoryGLM-5.3GPT-6.1 Terra Low
Task & likeness7.5/107.0/10
Anatomy & construction4.0/105.5/10
Space & placement6.0/106.0/10
Light & reflections4.0/105.5/10
Purposeful detail6.5/106.5/10
Artistry & character6.5/106.0/10
Materials & effects5.0/106.0/10
Visual integrity5.5/106.0/10

Benchmark task

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