STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Crouton Alpha vs Step 5 Preview

Crouton Alpha leads Step 5 Preview by 9.0 points on StealthMark, 48.0 to 39.0. It leads on 8 of 9 benchmarks, including both games, and Step 5 Preview on 1. Crouton Alpha scores higher on Beach, with its largest category advantage in prompt & likeness.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

48.0/100Overall rank 23/56
39.0/100Overall rank 39/56

General Intelligence

43.5/100
37.1/100

Visual Intelligence

56.0/100
41.9/100

Reasoning efficiency

How many reasoning tokens a model needs for the quality it delivers.

Single-step reasoning How much it reasons to understand a task

Multi-step reasoning How much it keeps reasoning as a task goes on

Cost efficiency

How much Performance you get for your money.

  • Crouton AlphaNot measured

Open or local

BENCHMARK BY BENCHMARK

Where each model leads

  • Crouton Alpha
  • Step 5 Preview
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Crouton Alpha
  • Step 5 Preview
  • Other models
  • Median
Context windowTokens per request, max output below
Crouton Alpha: Not publishedStep 5 Preview: 1M
Output speedTokens per second, our measurement
Crouton Alpha: 175tokens/sStep 5 Preview: Not measured
SizeTotal and active parameters
Crouton Alpha: Not disclosedStep 5 Preview: 600B27B active
Developer
Not publishedStepFun
Input → output
Not publishedText, image, video → text
Architecture
Not publishedSparse mixture-of-experts; 92 layers (88 MoE), 352 routed experts with 8 selected per token plus a shared expert; grouped-query attention with 512-token sliding windows and full attention every fourth layer; 3 multi-token-prediction layers; vision tower for image and video input

Full datasheets, every price and sourceStep 5 Preview ↗

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.

Crouton Alpha 32.3/100Rank 29/52

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

Step 5 Preview 59.9/100Rank 45/521 of 3 levels

1 of 3 played
Foresight: complete playing field
Level 122 ptsTurn 28 / 28

Points per level

LevelCrouton AlphaStep 5 Preview
Level 1Second Thoughts
3 ptsOut of lives
22 ptsSurvived
Level 2Pressure Pot
7 ptsOut of lives
Pending
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.

Crouton Alpha 59.5/100Rank 24/53

Cleared 4 of 5
Latch: complete playing field
Level 520.2 ptsTurn 29 / 40

Step 5 Preview 40.7/100Rank 31/53

Cleared 4 of 5
Latch: complete playing field
Level 515 ptsTurn 35 / 40

Points per level

LevelCrouton AlphaStep 5 Preview
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.4 ptsCleared
9 ptsCleared
Level 3Relay vault
11.2 ptsFinished early
18.6 ptsCleared
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
15.6 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.2 ptsCleared
15 ptsFinished early

Newton's Mirror

Same task instructions

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

The judgment

Crouton Alpha

The artwork establishes approximate central placement, a separate airborne black blob, and basic wall and floor sphere images. Its defining weaknesses are the largely absent recursive reflection system, missing emitter mappings, satin steel appearance and unresolved paint interaction. The black lateral wedges do not establish a separate viewport, and the hidden floor contact does not establish a gap. The category values remain unchanged.

Step 5 Preview

The main sphere, airborne black and small colored features occupy broadly appropriate positions. Most of the defining mirror system is absent, and paint interaction remains only partially supported. The small paint features do not visibly establish a separate volume-scale violation.

Score breakdown

CategoryCrouton AlphaStep 5 Preview
State at 600 ms19.0/2520.0/25
Camera and placement11.0/1513.5/15
Reflections21.5/12020.0/120
Materials and scale6.0/107.0/10
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

Crouton Alpha

A cheerful, readable cartoon captures the crouton's signature expression and many specific accessories. Coherent cube geometry and foreground foreshortening support the selfie. Simple construction and flat material treatment limit its sophistication, while the tipping raft, advancing soup and unnoticed soaking remain insufficiently clear.

Step 5 Preview

A charming diagonal climber and warm palette communicate the central idea. Simple rounded construction, crowded limb counting, uncertain footholds and an unattached upper shelf limit its physical coherence. Growth bands and the yarn trail add specificity, but the requested material distinctions and unravelled bootie remain underdeveloped.

Score breakdown

CategoryCrouton AlphaStep 5 Preview
Task & likeness6.5/106.0/10
Anatomy & construction5.5/104.5/10
Space & placement6.5/105.0/10
Light & reflections5.5/105.5/10
Purposeful detail7.0/105.5/10
Artistry & character5.0/105.0/10
Materials & effects5.5/106.0/10
Visual integrity7.5/105.0/10

Benchmark task

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

Mona Lisa

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

Crouton Alpha

A recognizable, coherent simplification with readable eyes, a restrained smile and modest facial volume. Frontal symmetry, an oversized head, capsule-like hands and geometric scenery substantially limit likeness, anatomy and depth. Clean contours preserve basic integrity but do not establish sophisticated construction or finish.

Step 5 Preview

A recognizable, coherent simplification with purposeful facial contours and differentiated fingers. These provide more construction and detail than the broad silhouette alone suggests. The oversized face, frontal seated pose, unresolved wrists and sparse landscape still substantially limit likeness, depth and finish.

Score breakdown

CategoryCrouton AlphaStep 5 Preview
Task & likeness4.5/104.0/10
Anatomy & construction4.0/104.0/10
Space & placement4.5/104.0/10
Light & reflections5.0/103.5/10
Purposeful detail4.0/104.0/10
Artistry & character4.5/104.0/10
Materials & effects4.0/103.0/10
Visual integrity6.0/103.5/10

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

Beach

Same task instructions

Creativity, perspective and visual beauty.

The judgment

Crouton Alpha

A colorful, readable sunset beach scene with playful subjects and a clear central reflection. Purposeful equipment and animal details reward inspection, and the principal attachments remain intact. Basic geometric anatomy, mixed viewpoints and sparse directional shadows limit its construction and depth; smooth gradients provide atmosphere with little material differentiation.

Step 5 Preview

A recognizable sunset beach with clear warm-cool contrast and playful accessories. Basic animal construction, shallow foreground placement and schematic reflections limit spatial and physical credibility. Sparse descriptive detail and abruptly ended sky bands constrain the finish.

Score breakdown

CategoryCrouton AlphaStep 5 Preview
Task & likeness8.5/104.0/10
Anatomy & construction5.0/103.0/10
Space & placement5.5/103.5/10
Light & reflections5.5/103.5/10
Purposeful detail7.0/103.0/10
Artistry & character5.0/103.0/10
Materials & effects5.5/103.5/10
Visual integrity7.0/104.0/10

Benchmark task

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

Ground Truth

Same task instructions

Physical reasoning, light and visual reconstruction.

The judgment

Crouton Alpha

This benchmark has not been assessed yet.

Step 5 Preview

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

Same task instructions

Scene composition and interacting subjects.

The judgment

Crouton Alpha

A readable cartoon with expressive faces, purposeful markings and clear water motion. Hull shading and an underside shadow establish modest depth. The dog contacts the controls, but the raccoon's frontal pose leaves its seated weight unresolved. Simple anatomy and limited shared perspective constrain the drawing.

Step 5 Preview

Recognizable animals, a bright palette and identifying accessories support a basic cartoon. Primitive anatomy, partial seated support, unresolved steering and weak hull-water contact limit the central action. Lighting and spray provide atmosphere without establishing convincing physical depth.

Score breakdown

CategoryCrouton AlphaStep 5 Preview
Task & likeness7.0/104.0/10
Anatomy & construction5.0/104.5/10
Space & placement6.0/103.0/10
Light & reflections6.0/103.5/10
Purposeful detail6.5/104.0/10
Artistry & character5.0/103.5/10
Materials & effects5.5/103.0/10
Visual integrity6.0/103.0/10

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

Same task instructions

Subject construction and spatial relationships.

The judgment

Crouton Alpha

A recognizable, expressive pelican cyclist with purposeful feather and bicycle detail. Readable steering reach, connected machinery and modest body shading earn additional credit. Jointless legs, uncertain pedal engagement and unclear seated support keep the central action only partially resolved; shallow space and simple materials further limit the illustration.

Step 5 Preview

The pelican and bicycle are recognizable, with a pleasant palette and basic diffuse shading. The riding relationship fails physically: the bird is unsupported, the front wheel is unmounted, and pedalling is unresolved. Simple geometric construction and sparse material treatment further limit the drawing.

Score breakdown

CategoryCrouton AlphaStep 5 Preview
Task & likeness7.0/103.0/10
Anatomy & construction5.0/103.0/10
Space & placement5.5/103.0/10
Light & reflections5.5/103.0/10
Purposeful detail6.5/104.0/10
Artistry & character5.5/103.0/10
Materials & effects5.0/103.0/10
Visual integrity6.0/102.0/10

Benchmark task

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