STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Beam 1.0 501B A23B vs Inkling-Small

Beam 1.0 501B A23B leads Inkling-Small by 4.3 points on StealthMark, 31.9 to 27.6. It leads on 7 of 9 benchmarks, including both games, and Inkling-Small on 2. Beam 1.0 501B A23B scores higher on Newton's Mirror, with its largest category advantage in camera and placement.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

31.9/100Overall rank 42/53
27.6/100Overall rank 43/53

General Intelligence

30.9/100
25.5/100

Visual Intelligence

33.8/100
31.1/100

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

  • Inkling-Small

Open or local

Open modelApache 2.0
Open modelApache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Beam 1.0 501B A23B
  • Inkling-Small
  • Other models
  • Median

DATASHEET

Specs and pricing

Both take about 1M tokens of context.

  • Beam 1.0 501B A23B
  • Inkling-Small
  • Other models
  • Median
PricePer 1M output tokens, input below
Beam 1.0 501B A23B: $1$0.25 inputInkling-Small: No list price
Context windowTokens per request, max output below
Beam 1.0 501B A23B: 1MTied128K max outputInkling-Small: 1MTied
Output speedTokens per second, our measurement
Beam 1.0 501B A23B: 972tokens/sInkling-Small: Not measured
SizeTotal and active parameters
Beam 1.0 501B A23B: 501B23.4B activeInkling-Small: 276B12B active
Developer
Reflection AIThinking Machines Lab
Released
16 Oct 2026Not published
Origin
United StatesNot published
Input → output
Text → textText, image, audio → 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 attention42-layer decoder-only transformer with sparse mixture-of-experts feed-forward (6 of 256 routed experts plus 2 shared per token); hybrid local and global attention; natively multimodal with a hierarchical patch image encoder and discrete-token audio

Full datasheets, every price and sourceBeam 1.0 501B A23B ↗Inkling-Small ↗

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 18/49

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

Inkling-Small 30.2/100Rank 29/49

Survived 0 of 3
Foresight: complete playing field
Level 38 ptsTurn 17 / 20

Points per level

LevelBeam 1.0 501B A23BInkling-Small
Level 1Second Thoughts
18 ptsOut of lives
9 ptsOut of lives
Level 2Pressure Pot
9 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
8 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.

Beam 1.0 501B A23B 37.3/100Rank 31/50

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

Inkling-Small 34.7/100Rank 34/50

Cleared 3 of 5
Latch: complete playing field
Level 518 ptsTurn 40 / 40

Points per level

LevelBeam 1.0 501B A23BInkling-Small
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.6 ptsCleared
9.8 ptsCleared
Level 3Relay vault
11.2 ptsFinished early
2.8 ptsFinished early
Level 4Passing bay
3.6 ptsFinished early
8 ptsFinished early
Level 5Second thoughts
5 ptsFinished early
18 ptsCleared

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.

Inkling-Small

The sphere's apparent floor support, separate dark feature and broad paint ordering justify partial state credit. The major weakness is the largely missing mirror system: isolated side images and faint floor echoes do not establish repeated virtual rooms or curved spherical mapping. Downward framing, the oversized frontal panel, unresolved paint transport and satin surface appearance remain distinct limitations.

Score breakdown

CategoryBeam 1.0 501B A23BInkling-Small
State at 600 ms20.5/2514.0/25
Camera and placement11.5/153.0/15
Reflections2.0/1208.0/120
Materials and scale3.0/102.5/10
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.

Inkling-Small

The faces and dripping caps communicate a cute mushroom scene, but simple construction and weak spatial relationships limit the result. The defining foot-stamping action is unresolved, the flattering portrait is smaller than its painter, and the requested material contrasts are only partly conveyed.

Score breakdown

CategoryBeam 1.0 501B A23BInkling-Small
Task & likeness4.0/102.5/10
Anatomy & construction3.5/101.5/10
Space & placement5.5/103.5/10
Light & reflections5.5/103.0/10
Purposeful detail4.5/104.5/10
Artistry & character4.0/103.0/10
Materials & effects4.5/103.5/10
Visual integrity7.0/102.0/10

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.

Inkling-Small

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

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.

Inkling-Small

A recognizable but rudimentary Mona Lisa interpretation. Facial shading and subdued colors provide coherence, while the frontal blocklike torso, unresolved wrists, fingerless hands and shallow landscape substantially limit likeness, construction and finish.

Score breakdown

CategoryBeam 1.0 501B A23BInkling-Small
Task & likeness0.0/102.5/10
Anatomy & construction0.0/102.5/10
Space & placement0.0/103.0/10
Light & reflections0.5/102.5/10
Purposeful detail0.0/102.0/10
Artistry & character0.0/102.5/10
Materials & effects0.0/102.0/10
Visual integrity0.0/103.0/10

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

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.

Inkling-Small

A recognizable sunset beach with a clear focal sun and appealing color transitions. Connected fish silhouettes and layered scenery establish basic coherence. Primitive figures, ambiguous recreation, sparse descriptive detail and weak grounding limit construction and depth. The aligned reflection supplies a useful lighting cue, but shadows and material effects remain underdeveloped.

Score breakdown

CategoryBeam 1.0 501B A23BInkling-Small
Task & likeness7.0/103.5/10
Anatomy & construction5.0/103.0/10
Space & placement6.0/103.0/10
Light & reflections5.0/103.0/10
Purposeful detail5.5/103.0/10
Artistry & character4.0/103.0/10
Materials & effects5.0/102.5/10
Visual integrity5.0/102.0/10

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.

Inkling-Small

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.

Inkling-Small

Recognizable animals, readable accessories and an appealing sunset support a coherent basic cartoon. Rounded construction leaves joints, riding support and steering unresolved. Decorative gradients contribute atmosphere, but directional lighting, distinct materials and convincing water displacement are weakly demonstrated.

Score breakdown

CategoryBeam 1.0 501B A23BInkling-Small
Task & likeness5.0/104.0/10
Anatomy & construction3.5/103.0/10
Space & placement5.5/104.0/10
Light & reflections4.0/105.0/10
Purposeful detail6.5/105.5/10
Artistry & character3.5/104.0/10
Materials & effects5.0/105.0/10
Visual integrity6.5/105.0/10

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.

Inkling-Small

The pelican is immediately recognizable, and its sweeping neck, shaped bill and orderly spokes provide character. Riding remains only partially realized: legs, pedal engagement, steering and seat support cannot be read confidently. Controlled graphic effects add atmosphere, but simplified construction and weak grounding keep the result basic.

Score breakdown

CategoryBeam 1.0 501B A23BInkling-Small
Task & likeness5.5/104.0/10
Anatomy & construction4.5/103.0/10
Space & placement5.0/103.0/10
Light & reflections4.0/103.0/10
Purposeful detail4.0/104.5/10
Artistry & character4.0/105.0/10
Materials & effects4.0/104.5/10
Visual integrity5.5/103.0/10

Benchmark task

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