STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Beam 1.0 501B A23B vs DeepSeek-V4.1-Flash-1017

DeepSeek-V4.1-Flash-1017 leads Beam 1.0 501B A23B by 27.3 points on StealthMark, 59.2 to 31.9. It leads on all 9 benchmarks. DeepSeek-V4.1-Flash-1017 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
59.2/100Overall rank 9/53

General Intelligence

30.9/100
56.8/100

Visual Intelligence

33.8/100
63.5/100

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 modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • Beam 1.0 501B A23B
  • DeepSeek-V4.1-Flash-1017
  • Other models
  • Median

DATASHEET

Specs and pricing

Beam 1.0 501B A23B is 20% cheaper per output token and runs 3.1× faster in our speed test. DeepSeek-V4.1-Flash-1017 scores higher on StealthMark. Both take about 1M tokens of context.

  • Beam 1.0 501B A23B
  • DeepSeek-V4.1-Flash-1017
  • Other models
  • Median
PricePer 1M output tokens, input below
Beam 1.0 501B A23B: $120% cheaper$0.25 inputDeepSeek-V4.1-Flash-1017: $1.20$0.30 input
Context windowTokens per request, max output below
Beam 1.0 501B A23B: 1MTied128K max outputDeepSeek-V4.1-Flash-1017: 1MTied384K max output
Output speedTokens per second, our measurement
Beam 1.0 501B A23B: 9723.1× fastertokens/sDeepSeek-V4.1-Flash-1017: 310tokens/s
SizeTotal and active parameters
Beam 1.0 501B A23B: 501B23.4B activeDeepSeek-V4.1-Flash-1017: 763B16B activeEstimated
Developer
Reflection AIDeepSeek-AI
Released
16 Oct 202617 Oct 2026
Origin
United StatesChina
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 attentionSparse mixture-of-experts with a causal encoder-decoder design and native image understanding.

Full datasheets, every price and sourceBeam 1.0 501B A23B ↗DeepSeek-V4.1-Flash-1017 ↗

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

DeepSeek-V4.1-Flash-1017 52.9/100Rank 15/47

Survived 1 of 3
Foresight: complete playing field
Level 310 ptsTurn 15 / 20

Points per level

LevelBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
Level 1Second Thoughts
18 ptsOut of lives
26 ptsSurvived
Level 2Pressure Pot
9 ptsOut of lives
7 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
10 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

DeepSeek-V4.1-Flash-1017 73.9/100Rank 13/48

Cleared 5 of 5
Latch: complete playing field
Level 520 ptsTurn 30 / 40

Points per level

LevelBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
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
19.2 ptsCleared
Level 4Passing bay
3.6 ptsFinished early
16.4 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
5 ptsFinished early
20 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.

DeepSeek-V4.1-Flash-1017

Principal sphere and airborne-black placements are supported, and diminishing bilateral chains provide limited optical structure. Missing nested imagery, incomplete outer chains, distorted first images and sparse emitter recurrence remain the dominant weaknesses. Oversized paint bodies and unresolved cyan contact impose separate limitations.

Score breakdown

CategoryBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
State at 600 ms20.5/2523.0/25
Camera and placement11.5/1513.5/15
Reflections2.0/12034.0/120
Materials and scale3.0/108.5/10
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.

DeepSeek-V4.1-Flash-1017

An expressive, intricately drawn storybook scene with a complete flowing silhouette and differentiated glossy materials. The supported main lens and continuous shrimp body make the central interaction readable, but reciprocal eye lines, facial magnification and the smaller lens grip remain ambiguous. Bright granular fringes and crowded accessory lines limit the finish.

Score breakdown

CategoryBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
Task & likeness4.0/107.5/10
Anatomy & construction3.5/107.5/10
Space & placement5.5/108.0/10
Light & reflections5.5/107.0/10
Purposeful detail4.5/107.5/10
Artistry & character4.0/108.0/10
Materials & effects4.5/107.5/10
Visual integrity7.0/106.5/10

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.

DeepSeek-V4.1-Flash-1017

A whale and a tiny shrimp examine one another through bubble lenses, with an octopus nearby. The scene tests interacting characters, differences in scale and transparent materials.

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.

DeepSeek-V4.1-Flash-1017

A coherent graphic interpretation with controlled contours, modeled facial volume and purposeful portrait details. Replication remains limited by the frontal pose, enlarged face, altered expression and ambiguous crossed hands. Landscape layering provides depth, while schematic fabric, smooth surfaces and tonal bands constrain the finish.

Score breakdown

CategoryBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
Task & likeness0.0/105.0/10
Anatomy & construction0.0/105.0/10
Space & placement0.0/106.0/10
Light & reflections0.5/106.0/10
Purposeful detail0.0/105.5/10
Artistry & character0.0/105.5/10
Materials & effects0.0/105.5/10
Visual integrity0.0/106.0/10

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.

DeepSeek-V4.1-Flash-1017

A coherent, colorful beach illustration with controlled curves, clean layering and varied readable accessories. Castle details and small animal features strengthen its finish. Schematic airborne animals, uncertain board support, shallow architectural depth and decorative reflections limit physical coherence and drawing sophistication.

Score breakdown

CategoryBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
Task & likeness7.0/107.0/10
Anatomy & construction5.0/105.5/10
Space & placement6.0/105.5/10
Light & reflections5.0/106.0/10
Purposeful detail5.5/106.5/10
Artistry & character4.0/105.0/10
Materials & effects5.0/105.5/10
Visual integrity5.0/104.5/10

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.

DeepSeek-V4.1-Flash-1017

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.

DeepSeek-V4.1-Flash-1017

An appealing cartoon with recognizable riders, expressive faces and a cohesive twilight palette. Clean shapes support the composition, but ambiguous limb overlaps, weak seat contact and loosely resolved steering limit physical coherence. Lighting and water effects are decorative, with modest material differentiation and drawing complexity.

Score breakdown

CategoryBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
Task & likeness5.0/108.0/10
Anatomy & construction3.5/107.0/10
Space & placement5.5/107.0/10
Light & reflections4.0/106.5/10
Purposeful detail6.5/107.0/10
Artistry & character3.5/107.0/10
Materials & effects5.0/106.5/10
Visual integrity6.5/108.0/10

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.

DeepSeek-V4.1-Flash-1017

An expressive, controlled illustration with continuous body construction, substantial bicycle detail and effective landscape depth. Unclear foot-to-pedal and wing-to-handlebar contacts limit physical conviction and local readability. Purposeful detail and composition are stronger than directional lighting and material treatment.

Score breakdown

CategoryBeam 1.0 501B A23BDeepSeek-V4.1-Flash-1017
Task & likeness5.5/108.5/10
Anatomy & construction4.5/107.0/10
Space & placement5.0/107.5/10
Light & reflections4.0/106.5/10
Purposeful detail4.0/107.5/10
Artistry & character4.0/107.0/10
Materials & effects4.0/107.0/10
Visual integrity5.5/107.5/10

Benchmark task

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