Claude Fable 5.2 77.2/100Rank 2/53

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Claude Fable 5.2 leads GPT-6.1 Sol by 12.0 points on StealthMark, 79.8 to 67.8. It leads on 7 of 9 benchmarks, including both games, and GPT-6.1 Sol 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 sourceGPT-6.1 Sol ↗
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.
GPT-6.1 Sol
Recognizable first sphere images and several central planar lights provide limited geometric agreement. Missing outer chains, truncated panel sequences and simplified interiors across the main, side and floor spheres leave most of the recursive reflection structure unsupported.
| Category | Claude Fable 5.2 | GPT-6.1 Sol |
|---|---|---|
| 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.
GPT-6.1 Sol
Six outward-facing heads and evenly arranged loops make the pale interlocking knot immediately readable. Uniform widths, angular inner bends and fine scales preserve its ornamental geometry. The bodies feel more like textured tubes than living muscle: shading is subdued, crossing contact shadows are weak, and visible curved seams interrupt surface continuity. Small heads have readable eyes and jaws but limited anatomical depth.
| Category | Claude Fable 5.2 | GPT-6.1 Sol |
|---|---|---|
| Task & likeness | 9.0/10 | 8.5/10 |
| Anatomy & construction | 7.5/10 | 7.5/10 |
| Space & placement | 7.0/10 | 8.0/10 |
| Light & reflections | 7.0/10 | 7.0/10 |
| Purposeful detail | 6.5/10 | 7.5/10 |
| Artistry & character | 6.5/10 | 7.5/10 |
| Materials & effects | 7.0/10 | 7.0/10 |
| Visual integrity | 8.5/10 | 8.0/10 |
Claude Fable 5.2
A coral squid with spreading arms tests connected anatomy, balanced composition and soft surface shading.
GPT-6.1 Sol
A pale serpent woven into an interlocking knot tests connected anatomy, repeated structure and readable overlaps. Organic surface detail must work with the overall geometry.
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.
GPT-6.1 Sol
The recognizable pose, dark clothing and misty landscape form a coherent portrait. Soft facial shading creates volume, but the broad face, outlined eyes and simplified smile limit likeness. Overlapping hands have flattened fingers and ambiguous separation. Angular landscape shapes and sparse fabric detail keep the execution competent rather than masterful.
| Category | Claude Fable 5.2 | GPT-6.1 Sol |
|---|---|---|
| Task & likeness | 6.5/10 | 6.5/10 |
| Anatomy & construction | 6.0/10 | 5.5/10 |
| Space & placement | 6.0/10 | 6.5/10 |
| Light & reflections | 6.5/10 | 6.5/10 |
| Purposeful detail | 6.0/10 | 5.5/10 |
| Artistry & character | 6.5/10 | 6.5/10 |
| Materials & effects | 7.5/10 | 6.0/10 |
| Visual integrity | 7.5/10 | 7.0/10 |
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.
GPT-6.1 Sol
A cohesive sunset palette, sweeping shoreline and framing palm create an appealing beach illustration. Animals, birds, play and a prominent sun reflection fulfill the brief. Connected but schematic figures and simplified dolphin anatomy limit construction; stepped reflections and mostly flat surfaces limit lighting and material depth. Small beach accessories remain readable and edges are clean.
| Category | Claude Fable 5.2 | GPT-6.1 Sol |
|---|---|---|
| Task & likeness | 9.0/10 | 8.5/10 |
| Anatomy & construction | 8.0/10 | 7.5/10 |
| Space & placement | 7.5/10 | 7.5/10 |
| Light & reflections | 8.5/10 | 7.5/10 |
| Purposeful detail | 8.5/10 | 7.5/10 |
| Artistry & character | 8.0/10 | 7.0/10 |
| Materials & effects | 7.5/10 | 7.0/10 |
| Visual integrity | 8.0/10 | 8.5/10 |
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.
GPT-6.1 Sol
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.
GPT-6.1 Sol
The masked raccoon rides the dog's back, and the dog's forepaw meets a handlebar connected to the deck. Expressive faces, a striped tail and sweeping wake create an appealing composition. Overlapping bodies compress the seating and rear-leg anatomy; hull depth and sunset illumination remain schematic.
| Category | Claude Fable 5.2 | GPT-6.1 Sol |
|---|---|---|
| Task & likeness | 8.5/10 | 8.5/10 |
| Anatomy & construction | 8.0/10 | 7.5/10 |
| Space & placement | 7.5/10 | 7.5/10 |
| Light & reflections | 7.0/10 | 6.5/10 |
| Purposeful detail | 8.5/10 | 8.0/10 |
| Artistry & character | 8.0/10 | 8.0/10 |
| Materials & effects | 7.5/10 | 7.5/10 |
| Visual integrity | 8.0/10 | 8.5/10 |
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.
GPT-6.1 Sol
A clearly recognizable pelican rides a well-composed bicycle through a warm coastal scene. The expressive bill, restrained palette and carefully drawn wheels give the illustration character. Leg-to-pedal connections are less convincing, especially the obscured far foot. Lighting provides gentle volume but little directional shadow. The small subtitle is clipped at the lower border.
| Category | Claude Fable 5.2 | GPT-6.1 Sol |
|---|---|---|
| Task & likeness | 9.0/10 | 9.0/10 |
| Anatomy & construction | 8.0/10 | 7.0/10 |
| Space & placement | 7.5/10 | 8.0/10 |
| Light & reflections | 6.5/10 | 7.0/10 |
| Purposeful detail | 8.0/10 | 8.0/10 |
| Artistry & character | 7.5/10 | 8.5/10 |
| Materials & effects | 7.0/10 | 7.5/10 |
| Visual integrity | 8.0/10 | 8.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.