STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GLM-5.3 vs Kimi K3.1 Pro

Kimi K3.1 Pro leads GLM-5.3 by 11.6 points on StealthMark, 56.7 to 45.1. It leads on 6 of 9 benchmarks, including both games, and GLM-5.3 on 3. Kimi K3.1 Pro scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

45.1/100Overall rank 27/53
56.7/100Overall rank 11/53

General Intelligence

37.6/100
53.9/100

Visual Intelligence

57.2/100
62.0/100

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

BENCHMARK BY BENCHMARK

Where each model leads

  • GLM-5.3
  • Kimi K3.1 Pro
  • Other models
  • Median

DATASHEET

Specs and pricing

GLM-5.3 is 2.3× cheaper per output token. Kimi K3.1 Pro scores higher on StealthMark and runs 36% faster in our speed test. Both take about 1M tokens of context.

  • GLM-5.3
  • Kimi K3.1 Pro
  • Other models
  • Median
PricePer 1M output tokens, input below
GLM-5.3: $4.402.3× cheaper$1.40 inputKimi K3.1 Pro: $10$2 input
Context windowTokens per request, max output below
GLM-5.3: 1MTied128K max outputKimi K3.1 Pro: 1MTied1M max output
Output speedTokens per second, our measurement
GLM-5.3: 86tokens/sKimi K3.1 Pro: 11736% fastertokens/s
SizeTotal and active parameters
GLM-5.3: 753BAll activeKimi K3.1 Pro: 2.8T104B activeEstimated
Developer
Z.AIMoonshot AI
Released
17 Aug 202623 Oct 2026
Origin
ChinaBoth
Input → output
Text → textText, image, video → text
Architecture
GLM MoE with DSA sparse attentionPost-trained version of Kimi K3, a Mixture-of-Experts model

Full datasheets, every price and sourceGLM-5.3 ↗Kimi K3.1 Pro ↗

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

Kimi K3.1 Pro 61.1/100Rank 10/47

Survived 1 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Points per level

LevelGLM-5.3Kimi K3.1 Pro
Level 1Second Thoughts
27 ptsSurvived
15 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
12 ptsOut of lives
Level 3Hide or Flight
Pending
15 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 37/48

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

Kimi K3.1 Pro 81.8/100Rank 8/48

Cleared 5 of 5
Latch: complete playing field
Level 519.8 ptsTurn 31 / 40

Points per level

LevelGLM-5.3Kimi K3.1 Pro
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9 ptsCleared
9.8 ptsCleared
Level 3Relay vault
7.6 ptsFinished early
19.2 ptsCleared
Level 4Passing bay
3.2 ptsFinished early
18.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
12.2 ptsFinished early
19.8 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.

Kimi K3.1 Pro

The settled sphere, separate airborne black paint and crimson-before-cyan interaction are supported, with a modest crimson travel overshoot. A shared downward framing displacement remains after accounting for the square canvas. The principal limitation is the reflection system: sparse sphere copies and generic curved bands omit most of the ordered mirror-room structure. Materials receive a small upward revision because bounded bright images and dark bands visibly establish some polish, while soft shading and bulky paint remain separate weaknesses.

Score breakdown

CategoryGLM-5.3Kimi K3.1 Pro
State at 600 ms9.0/2523.5/25
Camera and placement9.0/1510.5/15
Reflections10.0/12026.0/120
Materials and scale7.0/107.0/10
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

Same 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.

Kimi K3.1 Pro

The transformed reflection, attentive pose and constellation anatomy clearly communicate introspection. Purposeful fine details enrich a coherent composition. Tubular limbs, crowded lower-body overlaps, shallow depth and limited cast lighting keep the overall execution within the competent range.

Score breakdown

CategoryGLM-5.3Kimi K3.1 Pro
Task & likeness9.0/108.0/10
Anatomy & construction7.0/105.5/10
Space & placement7.0/106.5/10
Light & reflections8.0/106.5/10
Purposeful detail8.0/107.5/10
Artistry & character7.0/107.0/10
Materials & effects7.5/107.0/10
Visual integrity8.0/107.0/10

Benchmark task

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.

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.

Kimi K3.1 Pro

A coherent, recognizable interpretation with controlled color and readable landscape layers. Replication is limited by the frontal seated construction, elongated facial proportions and oversized, weakly articulated hands. Smooth shading supplies some volume but little of the reference's subtle expression, fabric structure or atmospheric transitions.

Score breakdown

CategoryGLM-5.3Kimi K3.1 Pro
Task & likeness3.0/105.0/10
Anatomy & construction2.0/105.0/10
Space & placement3.0/105.5/10
Light & reflections4.5/106.0/10
Purposeful detail3.0/105.5/10
Artistry & character2.5/106.0/10
Materials & effects3.5/105.0/10
Visual integrity4.0/106.5/10

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.

Kimi K3.1 Pro

A coherent, playful beach illustration with readable animals, an organized composition and an aligned sunset reflection. Connected silhouettes, sand texture and atmospheric effects demonstrate controlled execution. Simplified joints, flattened foreground viewpoints and inconsistent shadows limit anatomical and spatial credibility.

Score breakdown

CategoryGLM-5.3Kimi K3.1 Pro
Task & likeness8.5/108.5/10
Anatomy & construction7.5/105.5/10
Space & placement7.0/105.5/10
Light & reflections7.0/106.5/10
Purposeful detail8.0/106.5/10
Artistry & character7.5/105.5/10
Materials & effects6.5/106.5/10
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.

Kimi K3.1 Pro

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.

Kimi K3.1 Pro

The additional comparisons support retaining the assessment. Readable steering, shaped animal contours and purposeful details coexist with simplified joints, a frontal passenger whose seated weight is weakly conveyed, and limited physical lighting. The angled craft establishes more depth than the riding pose resolves.

Score breakdown

CategoryGLM-5.3Kimi K3.1 Pro
Task & likeness6.5/107.0/10
Anatomy & construction4.5/105.5/10
Space & placement5.5/106.0/10
Light & reflections4.0/105.5/10
Purposeful detail5.0/107.0/10
Artistry & character4.0/106.0/10
Materials & effects5.0/106.0/10
Visual integrity7.5/107.0/10

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.

Kimi K3.1 Pro

A characterful coastal illustration with controlled contours and varied feather, accessory and bicycle detail. Layered scenery and subtle shading enrich the presentation. Soft leg articulation, unresolved riding contacts, shallow depth and generalized lighting limit physical precision.

Score breakdown

CategoryGLM-5.3Kimi K3.1 Pro
Task & likeness7.5/108.5/10
Anatomy & construction4.0/107.5/10
Space & placement6.0/106.5/10
Light & reflections4.0/106.5/10
Purposeful detail6.5/107.5/10
Artistry & character6.5/107.5/10
Materials & effects5.0/106.5/10
Visual integrity5.5/107.5/10

Benchmark task

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