Claude Fable 5.2 77.2/100Rank 2/53

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Claude Fable 5.2 leads Claude Sonnet 5.5 by 9.6 points on StealthMark, 79.8 to 70.2. It leads on 7 of 9 benchmarks, including both games, and Claude Sonnet 5.5 on 2. Claude Fable 5.2 scores higher on Newton's Mirror, with its largest category advantage in reflections.
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BENCHMARK BY BENCHMARK
DATASHEET
Full datasheets, every price and sourceClaude Sonnet 5.5 ↗
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.


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.


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


Claude Fable 5.2
The composition closely preserves the principal camera relationships. Visible cyan contact, elongated crimson coating and separate airborne black paint support the required interaction sequence, with a small crimson transport overshoot. Correct broad mirror placement coexists with major omissions in nested spherical imagery and simplified emitter mapping. Core score: 105.5/170; floor-damage reward: 0/10; combined total: 105.5/180.
Claude Sonnet 5.5
The near-field silhouettes, broad perspective and paint contact order are recognizable. Missing outer chains, truncated repetitions and absent ordered imagery within the main and reflected spheres substantially limit the reflection system. Sparse spherical highlights leave much of the curved room and emitter mapping unsupported, despite some plausible planar light sequences.
| Category | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
| State at 600 ms | 24.0/25 | 24.0/25 |
| Camera and placement | 15.0/15 | 15.0/15 |
| Reflections | 80.0/120 | 35.0/120 |
| Materials and scale | 8.5/10 | 10.0/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 |
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Visual construction and creative interpretation.


Claude Fable 5.2
The compact mantle, eight curling rays and quiet face closely realize the requested living emblem. Controlled arm contours, coherent overlaps and restrained ornament give the design character. Shallow depth, ribbon-like arm modeling and repeated highlight bands limit anatomical and lighting complexity without compromising the intact silhouette.
Claude Sonnet 5.5
The centered coral squid has a friendly, composed expression and a balanced flower-like silhouette. Eight thick arms and two slender tentacles remain visibly connected, with no inverted parts. The mantle is elongated rather than compact, and the arm spacing is uneven. Soft shading gives volume, but dense stippling weakens the requested smooth matte finish; the broad background halo makes depth less precise.
| Category | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
| Task & likeness | 9.0/10 | 8.0/10 |
| Anatomy & construction | 7.5/10 | 8.0/10 |
| Space & placement | 7.0/10 | 8.0/10 |
| Light & reflections | 7.0/10 | 7.5/10 |
| Purposeful detail | 6.5/10 | 8.0/10 |
| Artistry & character | 6.5/10 | 8.0/10 |
| Materials & effects | 7.0/10 | 8.0/10 |
| Visual integrity | 8.5/10 | 8.5/10 |
A coral squid with spreading arms tests connected anatomy, balanced composition and soft surface shading.
Precise visual recall and portrait reconstruction.


Claude Fable 5.2
A developed illustrative portrait with controlled facial shading, connected limbs, layered scenery and distinct aged-paint and gold effects. Its frontal torso, conspicuous smile and flattened fingers limit replication and anatomical precision. Decorative finish is stronger than the underlying seated construction.
Claude Sonnet 5.5
The crossed hands, dark dress, restrained smile and winding landscape clearly recall the Mona Lisa. Replication is limited by the frontal symmetry, wide eyes, elongated neck and flattened fingers. Soft facial shading provides volume, but heavy darkness and pervasive crackle obscure forms. The composition is coherent; the landscape and fabric remain visibly schematic.
| Category | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
| Task & likeness | 6.5/10 | 6.5/10 |
| Anatomy & construction | 6.0/10 | 5.0/10 |
| Space & placement | 6.0/10 | 6.0/10 |
| Light & reflections | 6.5/10 | 6.5/10 |
| Purposeful detail | 6.0/10 | 6.0/10 |
| Artistry & character | 6.5/10 | 6.5/10 |
| Materials & effects | 7.5/10 | 6.0/10 |
| Visual integrity | 7.5/10 | 6.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


Claude Fable 5.2
A lively sunset beach with clear playful activity, purposeful small details and developed water reflections. Layering and supported placements hold the scene together. Schematic anatomy and the turtle's overhead viewpoint limit construction, space and artistry, while atmospheric and surface effects show greater refinement.
Claude Sonnet 5.5
A richly designed beach illustration combines radiant sunset bands, intricate palm fans and playful silhouettes within a cohesive purple, coral and turquoise palette. Carefully varied accessories reward close inspection, while overlapping foreground forms and shoreline layers organize the abundant activity. Dense palm strokes compete with focal subjects; animal anatomy, relative scales and reflected silhouettes remain simplified.
| Category | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
| Task & likeness | 9.0/10 | 9.0/10 |
| Anatomy & construction | 8.0/10 | 8.0/10 |
| Space & placement | 7.5/10 | 8.5/10 |
| Light & reflections | 8.5/10 | 8.5/10 |
| Purposeful detail | 8.5/10 | 9.5/10 |
| Artistry & character | 8.0/10 | 9.5/10 |
| Materials & effects | 7.5/10 | 8.5/10 |
| Visual integrity | 8.0/10 | 8.0/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


Claude Fable 5.2
This benchmark has not been assessed yet.
Claude Sonnet 5.5
This benchmark has not been assessed yet.
A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.
Scene composition and interacting subjects.


Claude Fable 5.2
A controlled action illustration with expressive animals, demonstrated riding and steering, and an energetic layered wake. Purposeful small features and articulated poses strengthen the drawing. Simplified extremities, shallow character volume and limited physical lighting remain its principal constraints.
Claude Sonnet 5.5
The raccoon clearly rides on the dog's back while the dog grips the jet ski controls. Expressive faces, vivid colors and a sweeping wake make the scene appealing. Visible limbs connect coherently, but overlapping steering paws and an indistinct control mounting weaken construction. Flat character lighting and simplified water limit depth and material realism.
| Category | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
| Task & likeness | 8.5/10 | 8.5/10 |
| Anatomy & construction | 8.0/10 | 7.0/10 |
| Space & placement | 7.5/10 | 8.0/10 |
| Light & reflections | 7.0/10 | 6.5/10 |
| Purposeful detail | 8.5/10 | 8.0/10 |
| Artistry & character | 8.0/10 | 7.0/10 |
| Materials & effects | 7.5/10 | 7.5/10 |
| Visual integrity | 8.0/10 | 8.0/10 |
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.
Subject construction and spatial relationships.


Claude Fable 5.2
A strong illustration with an expressive pelican, readable riding contacts and carefully constructed bicycle details. Layered plumage, basket weave and coastal scenery reward inspection. Continuous attachments support the action, while limited visible leg articulation, modest volume and weakly directional foreground lighting constrain physical sophistication.
Claude Sonnet 5.5
The pelican is immediately recognizable, with an expressive face, generous bill and appealing cycling pose. Spokes, chain, feathers and scarf provide purposeful detail. The bicycle largely holds together, though overlapping angular legs obscure the far foot’s pedal contact. Clean outlines and balanced composition succeed; flat surfaces and limited directional lighting constrain depth.
| Category | Claude Fable 5.2 | Claude Sonnet 5.5 |
|---|---|---|
| Task & likeness | 9.0/10 | 9.0/10 |
| Anatomy & construction | 8.0/10 | 7.5/10 |
| Space & placement | 7.5/10 | 7.5/10 |
| Light & reflections | 6.5/10 | 6.5/10 |
| Purposeful detail | 8.0/10 | 8.0/10 |
| Artistry & character | 7.5/10 | 7.5/10 |
| Materials & effects | 7.0/10 | 6.5/10 |
| Visual integrity | 8.0/10 | 8.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.