STEALTHMARK · HEAD TO HEAD
All comparisons ↗Fledge Alpha vs Iceman Contributor
Fledge Alpha leads Iceman Contributor by 16.6 points on StealthMark, 35.8 to 19.2. It leads on 6 of the 7 benchmarks with results for both and Iceman Contributor on 1. Fledge Alpha scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.
See the difference ↘Overall StealthMark
General Intelligence
Visual Intelligence
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
BENCHMARK BY BENCHMARK
Where each model leads
- Fledge Alpha
- Iceman Contributor
- Other models
- Median
Games
SVG
DATASHEET
Specs and pricing
Fledge Alpha scores higher on StealthMark and runs 35% faster in our speed test.
- Fledge Alpha
- Iceman Contributor
- Other models
- Median
Foresight
Play Foresight yourselfAnticipating 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.
Iceman Contributor 3.2/100Rank 47/47

Points per level
Latch
Play Latch yourselfCooperative 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.
Fledge AlphaNo run
Iceman Contributor 3.6/100Rank 44/48

Points per level
Newton's Mirror
Same task instructionsPhysics, perspective and recursive reflections, tested together. Explore the test ↗
Fledge Alpha 16.4/100 Rank 42/53

Iceman Contributor 10.1/100 Rank 48/53

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.
Iceman Contributor
The image provides limited evidence through rounded volume, faint wall strips and floor echoes. Its main sphere is small and low, the paint beads do not establish the required interaction history, and most of the defining mirror structure is missing.
Score breakdown
| Category | Fledge Alpha | Iceman Contributor |
|---|---|---|
| State at 600 ms | 9.0/25 | 0.5/25 |
| Camera and placement | 5.0/15 | 2.5/15 |
| Reflections | 7.5/120 | 7.5/120 |
| Materials and scale | 3.5/10 | 3.0/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 |
Benchmark task
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Selfie
Different task instructionsVisual construction and creative interpretation.
Fledge Alpha 61.1/100 Rank 30/53

Iceman Contributor 39.3/100 Rank 49/53

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.
Iceman Contributor
The crystal crown, cyan eyes and blue faceting communicate an icy fantasy character. Anatomical readability is substantially weaker: the ringed torso, crowded facial construction and fingerless appendages do not resolve the requested childlike crouch or pouncing gesture. Sparse surface detail and shallow shading further limit the result.
Score breakdown
| Category | Fledge Alpha | Iceman Contributor |
|---|---|---|
| Task & likeness | 7.5/10 | 4.0/10 |
| Anatomy & construction | 6.5/10 | 3.0/10 |
| Space & placement | 7.0/10 | 4.0/10 |
| Light & reflections | 5.5/10 | 4.5/10 |
| Purposeful detail | 6.5/10 | 4.0/10 |
| Artistry & character | 4.0/10 | 4.5/10 |
| Materials & effects | 6.0/10 | 4.5/10 |
| Visual integrity | 6.5/10 | 4.0/10 |
Benchmark task
Fledge Alpha
An eager young seabird running toward the viewer tests expressive anatomy, balance and a convincing forward-moving pose.
Iceman Contributor
Character scenes test expression, anatomy, materials and coherent visual construction.
Mona Lisa
Different task instructionsPrecise visual recall and portrait reconstruction.
Fledge Alpha 28.3/100 Rank 35/53

Iceman Contributor 19.3/100 Rank 41/53

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.
Iceman Contributor
The portrait retains a dark silhouette against an earthy landscape, but replication is weak. The frontal body, elongated facial proportions and undifferentiated hands lose the reference's defining pose and likeness. Basic gradients and layered hills provide some coherence, with little anatomical or painterly detail.
Score breakdown
| Category | Fledge Alpha | Iceman Contributor |
|---|---|---|
| Task & likeness | 3.0/10 | 1.5/10 |
| Anatomy & construction | 3.0/10 | 1.5/10 |
| Space & placement | 2.5/10 | 2.5/10 |
| Light & reflections | 2.5/10 | 2.0/10 |
| Purposeful detail | 3.0/10 | 2.0/10 |
| Artistry & character | 3.0/10 | 2.0/10 |
| Materials & effects | 2.5/10 | 2.0/10 |
| Visual integrity | 2.5/10 | 3.0/10 |
Benchmark task
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Beach
Different task instructionsCreativity, perspective and visual beauty.
Fledge Alpha 43.4/100 Rank 47/53

Iceman Contributor 46.4/100 Rank 42/53

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.
Iceman Contributor
A coherent sunset beach with recognizable animals, playful details and effective palm framing. Connected silhouettes and layered scenery support modest construction and placement credit. Jointless figures, limited foreshortening and an inadequately separated sun and reflection keep the execution basic despite its attractive color.
Score breakdown
| Category | Fledge Alpha | Iceman Contributor |
|---|---|---|
| Task & likeness | 7.5/10 | 7.0/10 |
| Anatomy & construction | 4.0/10 | 3.5/10 |
| Space & placement | 5.5/10 | 6.0/10 |
| Light & reflections | 5.0/10 | 4.0/10 |
| Purposeful detail | 3.0/10 | 5.5/10 |
| Artistry & character | 3.0/10 | 3.5/10 |
| Materials & effects | 2.5/10 | 4.5/10 |
| Visual integrity | 4.0/10 | 5.0/10 |
Benchmark task
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Ground Truth
Different task instructionsPhysical reasoning, light and visual reconstruction.
Fledge Alpha 36.8/100 Rank 33/53

Iceman Contributor 20.2/100 Rank 46/53

The judgment
Fledge Alpha
This benchmark has not been assessed yet.
Iceman Contributor
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 instructionsScene composition and interacting subjects.
Fledge Alpha 63.4/100 Rank 20/53

Iceman Contributor 29.8/100 Rank 49/53

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.
Iceman Contributor
The sunset palette and red hull establish an appealing setting, but the central interaction remains unresolved. Overlapping bodies obscure the dog, supported seating is unclear, and no readable paw-to-control grip demonstrates steering. Simple construction, weak environmental lighting and loosely described spray limit depth and finish.
Score breakdown
| Category | Fledge Alpha | Iceman Contributor |
|---|---|---|
| Task & likeness | 8.5/10 | 2.0/10 |
| Anatomy & construction | 5.5/10 | 3.0/10 |
| Space & placement | 7.5/10 | 3.0/10 |
| Light & reflections | 6.5/10 | 4.0/10 |
| Purposeful detail | 7.0/10 | 3.5/10 |
| Artistry & character | 5.5/10 | 2.5/10 |
| Materials & effects | 7.0/10 | 4.0/10 |
| Visual integrity | 4.5/10 | 2.5/10 |
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 instructionsSubject construction and spatial relationships.
Fledge Alpha 60.5/100 Rank 34/53

Iceman Contributor 38.0/100 Rank 48/53

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.
Iceman Contributor
A recognizable pelican and bicycle sit within an appealing sunset composition. Feather contours, bill shape and atmospheric colour provide character, but disconnected-looking leg origins, unclear pedal contact and unresolved steering weaken the central riding action. Consistent wheel alignment establishes a side view without resolving the rider's support.
Score breakdown
| Category | Fledge Alpha | Iceman Contributor |
|---|---|---|
| Task & likeness | 8.0/10 | 4.0/10 |
| Anatomy & construction | 6.0/10 | 3.5/10 |
| Space & placement | 6.5/10 | 3.5/10 |
| Light & reflections | 4.5/10 | 5.0/10 |
| Purposeful detail | 5.5/10 | 4.5/10 |
| Artistry & character | 5.0/10 | 3.5/10 |
| Materials & effects | 5.5/10 | 4.0/10 |
| Visual integrity | 6.5/10 | 3.0/10 |
Benchmark task
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.