STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Beam 1.0 501B A23B vs Gemma 4 26B A4B

Beam 1.0 501B A23B leads Gemma 4 26B A4B by 15.4 points on StealthMark, 31.9 to 16.5. It leads on 7 of 9 benchmarks, including both games, and Gemma 4 26B A4B on 2. Beam 1.0 501B A23B scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

31.9/100Overall rank 42/53
16.5/100Overall rank 50/53

General Intelligence

30.9/100
9.4/100

Visual Intelligence

33.8/100
28.9/100

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

  • Gemma 4 26B A4B

Open or local

Open modelApache 2.0
Local modelOpen model · Apache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Beam 1.0 501B A23B
  • Gemma 4 26B A4B
  • Other models
  • Median

DATASHEET

Specs and pricing

Beam 1.0 501B A23B scores higher on StealthMark, takes 4× more context and runs 10× faster in our speed test. Gemma 4 26B A4B is 3.3× cheaper per output token.

  • Beam 1.0 501B A23B
  • Gemma 4 26B A4B
  • Other models
  • Median
PricePer 1M output tokens, input below
Beam 1.0 501B A23B: $1$0.25 inputGemma 4 26B A4B: $0.303.3× cheaper$0.09 input
Context windowTokens per request, max output below
Beam 1.0 501B A23B: 1M4× larger128K max outputGemma 4 26B A4B: 256K
Output speedTokens per second, our measurement
Beam 1.0 501B A23B: 97210× fastertokens/sGemma 4 26B A4B: 95tokens/s
SizeTotal and active parameters
Beam 1.0 501B A23B: 501B23.4B activeGemma 4 26B A4B: 25.2B3.8B active
Developer
Reflection AIGoogle DeepMind
Released
16 Oct 20262 Apr 2026
Origin
United StatesBoth
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 attentionMixture-of-Experts multimodal transformer with interleaved sliding-window and global attention

Full datasheets, every price and sourceBeam 1.0 501B A23B ↗Gemma 4 26B A4B ↗

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

Gemma 4 26B A4B 4.1/100Rank 46/47

Survived 0 of 3
Foresight: complete playing field
Level 32 ptsTurn 9 / 20

Points per level

LevelBeam 1.0 501B A23BGemma 4 26B A4B
Level 1Second Thoughts
18 ptsOut of lives
3 ptsOut of lives
Level 2Pressure Pot
9 ptsOut of lives
2 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
2 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 29/48

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

Gemma 4 26B A4B 4.5/100Rank 41/48

Cleared 2 of 5
Latch: complete playing field
Level 53 ptsTurn 40 / 40

Points per level

LevelBeam 1.0 501B A23BGemma 4 26B A4B
Level 1Hold the door
5.2 ptsCleared
3 ptsCleared1 beacon left
Level 2Crossfeed
9.6 ptsCleared
6.2 ptsFinished early
Level 3Relay vault
11.2 ptsFinished early
15.2 ptsClearedFinished early · 3 beacons left
Level 4Passing bay
3.6 ptsFinished early
11.8 ptsFinished early
Level 5Second thoughts
5 ptsFinished early
3 ptsOut of turns

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.

Gemma 4 26B A4B

Separate airborne black and contact-compatible paint flattening earn partial state credit. Settlement, adhesion and differentiated paint transport remain unresolved. The enlarged, low sphere and thin lamp strip substantially depart from the required camera, while the defining mirror structure is missing. Weak material appearance and oversized black paint limit material credit. The retained base total is 18/170; the floor-damage reward is 0, giving 18/180.

Score breakdown

CategoryBeam 1.0 501B A23BGemma 4 26B A4B
State at 600 ms20.5/2510.0/25
Camera and placement11.5/152.0/15
Reflections2.0/1200.0/120
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.

Gemma 4 26B A4B

An appealing, readable sparkle-creature with luminous colour and expressive eyes. Simple geometric construction limits sophistication, while sharp body points, ambiguous hand contact and a minimally resolved jar weaken the requested soft, plump character and treasure-presenting pose.

Score breakdown

CategoryBeam 1.0 501B A23BGemma 4 26B A4B
Task & likeness4.0/105.5/10
Anatomy & construction3.5/104.5/10
Space & placement5.5/106.0/10
Light & reflections5.5/106.0/10
Purposeful detail4.5/105.5/10
Artistry & character4.0/104.0/10
Materials & effects4.5/106.0/10
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.

Gemma 4 26B A4B

A small luminous creature proudly holding an empty glass jar tests expression, transparent materials and the balance of character and prop.

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.

Gemma 4 26B A4B

The centered dark-haired portrait provides a loose reference cue, but its elongated, nearly featureless face and undifferentiated torso fall far short of replication. Crossed hands, the subtle smile, clothing structure and landscape are unresolved. Clean silhouettes and soft gradients provide limited coherence.

Score breakdown

CategoryBeam 1.0 501B A23BGemma 4 26B A4B
Task & likeness0.0/100.5/10
Anatomy & construction0.0/102.0/10
Space & placement0.0/101.0/10
Light & reflections0.5/102.0/10
Purposeful detail0.0/101.0/10
Artistry & character0.0/102.0/10
Materials & effects0.0/101.0/10
Visual integrity0.0/104.5/10

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.

Gemma 4 26B A4B

A clean, balanced sunset scene demonstrates the beach, birds and a centered reflection. Animals and play receive only minimal treatment. Coherent layers and controlled gradients support readability, but unresolved aquatic anatomy, sparse details and weak surface modeling keep the drawing basic.

Score breakdown

CategoryBeam 1.0 501B A23BGemma 4 26B A4B
Task & likeness7.0/103.5/10
Anatomy & construction5.0/102.0/10
Space & placement6.0/103.5/10
Light & reflections5.0/105.0/10
Purposeful detail5.5/101.0/10
Artistry & character4.0/101.5/10
Materials & effects5.0/102.0/10
Visual integrity5.0/106.0/10

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.

Gemma 4 26B A4B

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.

Gemma 4 26B A4B

The animal stack is recognizable, and clean silhouettes support a basic illustration. Steering is not depicted, while the craft's construction and water contact remain unresolved. Sparse anatomical and material detail limit the finish. The sky gradient and glow provide atmospheric lighting, but the subjects lack corresponding modeling.

Score breakdown

CategoryBeam 1.0 501B A23BGemma 4 26B A4B
Task & likeness5.0/102.5/10
Anatomy & construction3.5/102.5/10
Space & placement5.5/104.0/10
Light & reflections4.0/103.5/10
Purposeful detail6.5/102.5/10
Artistry & character3.5/103.0/10
Materials & effects5.0/102.0/10
Visual integrity6.5/107.0/10

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

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.

Gemma 4 26B A4B

A clean, balanced icon suggests a pelican riding a bicycle. Continuous contours and restrained colors support its finish, but the abbreviated bill, undifferentiated body, unresolved riding contacts and incomplete bicycle mechanism limit likeness and construction. Sparse detail and flat lighting keep the drawing basic despite its clarity.

Score breakdown

CategoryBeam 1.0 501B A23BGemma 4 26B A4B
Task & likeness5.5/103.0/10
Anatomy & construction4.5/103.0/10
Space & placement5.0/105.0/10
Light & reflections4.0/103.0/10
Purposeful detail4.0/103.0/10
Artistry & character4.0/102.5/10
Materials & effects4.0/102.5/10
Visual integrity5.5/105.0/10

Benchmark task

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