STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Beam 1.0 501B A23B vs GLM-5.3-Flash

GLM-5.3-Flash leads Beam 1.0 501B A23B by 16.9 points on StealthMark, 48.8 to 31.9. It leads on 7 of 9 benchmarks and Beam 1.0 501B A23B on 2, including both games. Ox Alpha scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
Model guide ↗

Overall StealthMark

31.9/100Overall rank 42/53
48.8/100Overall rank 19/53

General Intelligence

30.9/100
42.2/100

Visual Intelligence

33.8/100
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

Open or local

Open modelApache 2.0
Local modelOpen model · MIT

BENCHMARK BY BENCHMARK

Where each model leads

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

DATASHEET

Specs and pricing

Beam 1.0 501B A23B runs 11× faster in our speed test. GLM-5.3-Flash scores higher on StealthMark and is 2× cheaper per output token. Both take about 1M tokens of context.

  • Beam 1.0 501B A23B
  • GLM-5.3-Flash
  • Other models
  • Median
PricePer 1M output tokens, input below
Beam 1.0 501B A23B: $1$0.25 inputGLM-5.3-Flash: $0.502× cheaper$0.15 input
Context windowTokens per request, max output below
Beam 1.0 501B A23B: 1MTied128K max outputGLM-5.3-Flash: 1MTied131K max output
Output speedTokens per second, our measurement
Beam 1.0 501B A23B: 97211× fastertokens/sGLM-5.3-Flash: 89tokens/s
SizeTotal and active parameters
Beam 1.0 501B A23B: 501B23.4B activeGLM-5.3-Flash: 320B18B active
Developer
Reflection AIZ.AI
Released
16 Oct 202626 Aug 2026
Origin
United StatesNot published
Input → output
Text → textText, image → text
Architecture
Sparse mixture-of-experts transformer; 52 layers (3 dense, 49 MoE), 256 experts with 8 selected per token; gated GQA and sliding-window attentionHybrid sparse and linear attention MoE

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

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-Flash 49.0/100Rank 27/472 of 3 levels

2 of 3 played
Foresight: complete playing field
Level 316 ptsTurn 20 / 20

Points per level

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

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-Flash 4.0/100Rank 48/483 of 5 levels

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

Points per level

LevelBeam 1.0 501B A23BGLM-5.3-Flash
Level 1Hold the door
5.2 ptsCleared
4.4 ptsCleared
Level 2Crossfeed
9.6 ptsCleared
5.2 ptsFinished early
Level 3Relay vault
11.2 ptsFinished early
0.6 ptsFinished early
Level 4Passing bay
3.6 ptsFinished early
Pending
Level 5Second thoughts
5 ptsFinished early
Not played

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-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

CategoryBeam 1.0 501B A23BGLM-5.3-Flash
State at 600 ms20.5/2514.0/25
Camera and placement11.5/159.0/15
Reflections2.0/12021.5/120
Materials and scale3.0/103.5/10
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

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-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

CategoryBeam 1.0 501B A23BGLM-5.3-Flash
Task & likeness4.0/108.5/10
Anatomy & construction3.5/107.5/10
Space & placement5.5/107.5/10
Light & reflections5.5/108.0/10
Purposeful detail4.5/107.5/10
Artistry & character4.0/107.5/10
Materials & effects4.5/107.5/10
Visual integrity7.0/107.0/10

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-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

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-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

CategoryBeam 1.0 501B A23BGLM-5.3-Flash
Task & likeness0.0/104.5/10
Anatomy & construction0.0/104.5/10
Space & placement0.0/106.0/10
Light & reflections0.5/106.0/10
Purposeful detail0.0/105.0/10
Artistry & character0.0/105.0/10
Materials & effects0.0/105.5/10
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-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

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

Benchmark task

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

Ground Truth

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-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

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-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

CategoryBeam 1.0 501B A23BGLM-5.3-Flash
Task & likeness5.0/107.0/10
Anatomy & construction3.5/105.0/10
Space & placement5.5/106.0/10
Light & reflections4.0/105.0/10
Purposeful detail6.5/106.5/10
Artistry & character3.5/104.0/10
Materials & effects5.0/106.0/10
Visual integrity6.5/106.0/10

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

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-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

CategoryBeam 1.0 501B A23BGLM-5.3-Flash
Task & likeness5.5/108.5/10
Anatomy & construction4.5/107.5/10
Space & placement5.0/107.5/10
Light & reflections4.0/106.5/10
Purposeful detail4.0/107.0/10
Artistry & character4.0/108.0/10
Materials & effects4.0/106.5/10
Visual integrity5.5/108.0/10

Benchmark task

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