STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Fledge Alpha vs Inkling-Small

Fledge Alpha leads Inkling-Small by 8.2 points on StealthMark, 35.8 to 27.6. It leads on 6 of the 7 benchmarks with results for both, with 1 tied. Fledge Alpha scores higher on Raccoon, with its largest category advantage in prompt & likeness.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

35.8/100Overall rank 39/53
27.6/100Overall rank 43/53

General Intelligence

27.1/100
25.5/100

Visual Intelligence

45.2/100
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

  • Fledge AlphaMulti-step reasoning not measured
  • Inkling-Small

Open or local

Open modelApache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Fledge Alpha
  • Inkling-Small
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Fledge Alpha
  • Inkling-Small
  • Other models
  • Median
Context windowTokens per request, max output below
Fledge Alpha: Not publishedInkling-Small: 1M
Output speedTokens per second, our measurement
Fledge Alpha: 63tokens/sInkling-Small: Not measured
SizeTotal and active parameters
Fledge Alpha: Not disclosedInkling-Small: 276B12B active
Developer
Not publishedThinking Machines Lab
Input → output
Not publishedText, image, audio → text
Architecture
Not published42-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 sourceInkling-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.

Inkling-Small 30.2/100Rank 29/49

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

Points per level

LevelFledge AlphaInkling-Small
Level 1Second Thoughts
No run
9 ptsOut of lives
Level 2Pressure Pot
No run
6 ptsOut of lives
Level 3Hide or Flight
No run
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.

Inkling-Small 34.7/100Rank 34/50

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

Points per level

LevelFledge AlphaInkling-Small
Level 1Hold the door
No run
5.2 ptsCleared
Level 2Crossfeed
No run
9.8 ptsCleared
Level 3Relay vault
No run
2.8 ptsFinished early
Level 4Passing bay
No run
8 ptsFinished early
Level 5Second thoughts
No run
18 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Fledge Alpha

The candidate communicates a round metallic sphere, three paint colors and a separate airborne black blob. Its hovering support relationship, displaced framing and unresolved paint interaction limit physical credit. Sparse planar light ghosts and a soft sphere highlight provide little evidence for the required wall/floor repetitions and curved nested mirror imagery.

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

CategoryFledge AlphaInkling-Small
State at 600 ms9.0/2514.0/25
Camera and placement5.0/153.0/15
Reflections7.5/1208.0/120
Materials and scale3.5/102.5/10
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

Fledge Alpha

A coherent, appealing mascot with expressive eyes, a cheerful beak and a readable swept-back silhouette. Its larger forward foot and trailing feathers suggest a running stride, but the upright body, stiff legs and minimally articulated feet limit convincing motion. Clean flat shapes suit the brief, while uneven feather junctions and incomplete cream accents reduce polish.

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

CategoryFledge AlphaInkling-Small
Task & likeness7.5/102.5/10
Anatomy & construction6.5/101.5/10
Space & placement7.0/103.5/10
Light & reflections5.5/103.0/10
Purposeful detail6.5/104.5/10
Artistry & character4.0/103.0/10
Materials & effects6.0/103.5/10
Visual integrity6.5/102.0/10

Benchmark task

Fledge Alpha

An eager young seabird running toward the viewer tests expressive anatomy, balance and a convincing forward-moving pose.

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

Fledge Alpha

A recognizable but basic Mona Lisa reinterpretation with a coherent silhouette and subdued palette. Curtain-like hair obscures much of the face, while elongated facial construction and oversized, minimally articulated hands substantially weaken replication. Soft shading supplies modest volume, but anatomy, landscape depth and purposeful detail remain underdeveloped.

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

CategoryFledge AlphaInkling-Small
Task & likeness3.0/102.5/10
Anatomy & construction3.0/102.5/10
Space & placement2.5/103.0/10
Light & reflections2.5/102.5/10
Purposeful detail3.0/102.0/10
Artistry & character3.0/102.5/10
Materials & effects2.5/102.0/10
Visual integrity2.5/103.0/10

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

Fledge Alpha

A cheerful, recognizable sunset beach with a cohesive warm palette and clear accessories. Simple construction, uncertain palm support, an ambiguous upper boundary and schematic reflections limit depth and finish. The scene communicates its subject successfully but lacks the developed forms, lighting and detail of exceptional illustration.

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

CategoryFledge AlphaInkling-Small
Task & likeness7.5/103.5/10
Anatomy & construction4.0/103.0/10
Space & placement5.5/103.0/10
Light & reflections5.0/103.0/10
Purposeful detail3.0/103.0/10
Artistry & character3.0/103.0/10
Materials & effects2.5/102.5/10
Visual integrity4.0/102.0/10

Benchmark task

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

Ground Truth

Same task instructions

Physical reasoning, light and visual reconstruction.

The judgment

Fledge Alpha

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

Same task instructions

Scene composition and interacting subjects.

The judgment

Fledge Alpha

An appealing sunset illustration with recognizable characters and a clear riding action. Color, expression and silhouette are stronger than anatomical construction: overlapping paws obscure support, the dog's steering limb is simplified, and the vehicle controls lack definition. The wake conveys movement, while lighting and water reflections remain decorative.

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

CategoryFledge AlphaInkling-Small
Task & likeness8.5/104.0/10
Anatomy & construction5.5/103.0/10
Space & placement7.5/104.0/10
Light & reflections6.5/105.0/10
Purposeful detail7.0/105.5/10
Artistry & character5.5/104.0/10
Materials & effects7.0/105.0/10
Visual integrity4.5/105.0/10

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

Fledge Alpha

A clear, cheerful illustration with a recognizable pelican, coherent bicycle silhouette and tidy composition. Simplified leg articulation, steering contact, mechanical detail and lighting keep it at a competent illustrative level.

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

CategoryFledge AlphaInkling-Small
Task & likeness8.0/104.0/10
Anatomy & construction6.0/103.0/10
Space & placement6.5/103.0/10
Light & reflections4.5/103.0/10
Purposeful detail5.5/104.5/10
Artistry & character5.0/105.0/10
Materials & effects5.5/104.5/10
Visual integrity6.5/103.0/10

Benchmark task

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