STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Beam 1.0 501B A23B vs GLM-5.3

GLM-5.3 leads Beam 1.0 501B A23B by 13.2 points on StealthMark, 45.1 to 31.9. It leads on 7 of 9 benchmarks and Beam 1.0 501B A23B on 2, including both games. GLM-5.3 scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

31.9/100Overall rank 42/53
45.1/100Overall rank 27/53

General Intelligence

30.9/100
37.6/100

Visual Intelligence

33.8/100
57.2/100

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 modelApache 2.0
Open modelGLM-5.3 License

BENCHMARK BY BENCHMARK

Where each model leads

  • Beam 1.0 501B A23B
  • GLM-5.3
  • Other models
  • Median

DATASHEET

Specs and pricing

Beam 1.0 501B A23B is 4.4× cheaper per output token and runs 11× faster in our speed test. GLM-5.3 scores higher on StealthMark. Both take about 1M tokens of context.

  • Beam 1.0 501B A23B
  • GLM-5.3
  • Other models
  • Median
PricePer 1M output tokens, input below
Beam 1.0 501B A23B: $14.4× cheaper$0.25 inputGLM-5.3: $4.40$1.40 input
Context windowTokens per request, max output below
Beam 1.0 501B A23B: 1MTied128K max outputGLM-5.3: 1MTied128K max output
Output speedTokens per second, our measurement
Beam 1.0 501B A23B: 97211× fastertokens/sGLM-5.3: 86tokens/s
SizeTotal and active parameters
Beam 1.0 501B A23B: 501B23.4B activeGLM-5.3: 753BAll active
Developer
Reflection AIZ.AI
Released
16 Oct 202617 Aug 2026
Origin
United StatesChina
Input → output
Text → textBoth
Architecture
Sparse mixture-of-experts transformer; 52 layers (3 dense, 49 MoE), 256 experts with 8 selected per token; gated GQA and sliding-window attentionGLM MoE with DSA sparse attention

Full datasheets, every price and sourceBeam 1.0 501B A23B ↗GLM-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.

Beam 1.0 501B A23B 49.4/100Rank 18/47

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

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

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

Points per level

LevelBeam 1.0 501B A23BGLM-5.3
Level 1Second Thoughts
18 ptsOut of lives
27 ptsSurvived
Level 2Pressure Pot
9 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
Pending

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.

Beam 1.0 501B A23B 37.3/100Rank 29/48

Cleared 2 of 5
Latch: complete playing field
Level 55 ptsTurn 30 / 40

GLM-5.3 25.6/100Rank 37/48

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

Points per level

LevelBeam 1.0 501B A23BGLM-5.3
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.6 ptsCleared
9 ptsCleared
Level 3Relay vault
11.2 ptsFinished early
7.6 ptsFinished early
Level 4Passing bay
3.6 ptsFinished early
3.2 ptsFinished early
Level 5Second thoughts
5 ptsFinished early
12.2 ptsFinished early

Newton's Mirror

Same task instructions

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

The judgment

Beam 1.0 501B A23B

Central object placement is fairly close, but the defining mirrored-room structure is missing. The paint colors suggest the required contact order without establishing their different interaction histories. The faint floor oval does not demonstrate valid reflection geometry, so it earns no reflection credit. Rounded volume and glossy paint provide limited material credit despite weak metallic finishes and oversized paint bodies.

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.

Score breakdown

CategoryBeam 1.0 501B A23BGLM-5.3
State at 600 ms20.5/259.0/25
Camera and placement11.5/159.0/15
Reflections2.0/12010.0/120
Materials and scale3.0/107.0/10
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

Different task instructions

Visual construction and creative interpretation.

The judgment

Beam 1.0 501B A23B

An appealing expression and warm palette support a coherent simple cartoon. The central polishing joke is not legible: the cloth is unresolved and the nose sits away from the fan. Pointed radial plates, uncertain limb attachments and weak ground contact limit construction, while restrained surface detail limits material richness.

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.

Score breakdown

CategoryBeam 1.0 501B A23BGLM-5.3
Task & likeness4.0/109.0/10
Anatomy & construction3.5/107.0/10
Space & placement5.5/107.0/10
Light & reflections5.5/108.0/10
Purposeful detail4.5/108.0/10
Artistry & character4.0/107.0/10
Materials & effects4.5/107.5/10
Visual integrity7.0/108.0/10

Benchmark task

Beam 1.0 501B A23B

A golden pangolin polishes its oversized amber tail while its nose smudges the same scale. The scene tests expressive anatomy, physical contact and contrasting translucent, polished and soft materials.

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.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Beam 1.0 501B A23B

The candidate shows a faint warm oval against an almost entirely black field. Minimal placement and smooth tonal variation are visible, but the portrait, anatomy, crossed hands and landscape remain unreadable. The saved comparisons provide no specific evidence supporting a change to the baseline categories.

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.

Score breakdown

CategoryBeam 1.0 501B A23BGLM-5.3
Task & likeness0.0/103.0/10
Anatomy & construction0.0/102.0/10
Space & placement0.0/103.0/10
Light & reflections0.5/104.5/10
Purposeful detail0.0/103.0/10
Artistry & character0.0/102.5/10
Materials & effects0.0/103.5/10
Visual integrity0.0/104.0/10

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

Beam 1.0 501B A23B

A coherent, cheerful beach illustration fulfills the main subjects with clean shapes and a strong sunset focal point. Its basic geometric construction, ambiguous animal anatomy, shallow depth and schematic lighting limit its accomplishment. Decorative details provide interest without developing intricate forms or convincing physical surfaces.

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.

Score breakdown

CategoryBeam 1.0 501B A23BGLM-5.3
Task & likeness7.0/108.5/10
Anatomy & construction5.0/107.5/10
Space & placement6.0/107.0/10
Light & reflections5.0/107.0/10
Purposeful detail5.5/108.0/10
Artistry & character4.0/107.5/10
Materials & effects5.0/106.5/10
Visual integrity5.0/107.5/10

Benchmark task

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

Ground Truth

Different task instructions

Physical reasoning, light and visual reconstruction.

The judgment

Beam 1.0 501B A23B

This benchmark has not been assessed yet.

GLM-5.3

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

Beam 1.0 501B A23B

A cheerful, readable illustration with recognizable animals, expressive faces and useful accessories. Simple rounded construction limits complexity, while ambiguous steering attachments and weak hull-to-water contact reduce physical coherence. Lighting and surface effects establish the setting without convincing environmental interaction.

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.

Score breakdown

CategoryBeam 1.0 501B A23BGLM-5.3
Task & likeness5.0/106.5/10
Anatomy & construction3.5/104.5/10
Space & placement5.5/105.5/10
Light & reflections4.0/104.0/10
Purposeful detail6.5/105.0/10
Artistry & character3.5/104.0/10
Materials & effects5.0/105.0/10
Visual integrity6.5/107.5/10

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

Beam 1.0 501B A23B

A cheerful, clearly readable pelican-and-bicycle illustration with clean contours and balanced composition. Simple geometric construction limits artistic complexity, while ambiguous neck and steering overlaps, merged pedal contacts and an incomplete drivetrain weaken physical coherence.

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.

Score breakdown

CategoryBeam 1.0 501B A23BGLM-5.3
Task & likeness5.5/107.5/10
Anatomy & construction4.5/104.0/10
Space & placement5.0/106.0/10
Light & reflections4.0/104.0/10
Purposeful detail4.0/106.5/10
Artistry & character4.0/106.5/10
Materials & effects4.0/105.0/10
Visual integrity5.5/105.5/10

Benchmark task

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