STEALTHMARK · HEAD TO HEAD

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Claude Fable 5.1 vs Space Bunny Alpha

Claude Fable 5.1 scores 8.1 points higher overall (62.1 vs 54.0). Claude Fable 5.1 leads General Intelligence; Space Bunny Alpha leads Visual Intelligence. Claude Fable 5.1 scores higher on Newton's Mirror, with its largest category advantage in reflections.

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Model guide ↗

Overall StealthMark

62.1/100
54.0/100

General Intelligence

54.3/100
33.2/100

Visual Intelligence

67.7/100
72.9/100

Newton's Mirror

Same prompt

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

Claude Fable 5.151.7/100

Claude Fable 5.1: Newton's Mirror SVG benchmark
Researcher observations

The broad paint sequence, bilateral near-field sphere arrangement, overlaps and diminishing panel repetitions are recognizable; crimson is slightly too low. Small paint scale and basic shading provide material cues, although the steel response remains soft. Inaccurate light projections, missing outer chains and incomplete nested room imagery remain the principal limitations.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Space Bunny Alpha21.7/100

Space Bunny Alpha: Newton's Mirror SVG benchmark
29 Sep onwardResult details ↗
Researcher observations

Visible panel shapes, curved sphere highlights, rounded side images and a lower continuation beneath the large left image establish recognizable local mirror structure. Their uneven arrangement, missing receding chains and absent nested imagery remain substantial shortcomings. The main sphere's framing is close, but black lacks projected separation and cyan does not establish recent apex contact.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Compare category scores
CategoryClaude Fable 5.1Space Bunny Alpha
State at 600 ms24.0/2515.0/25
Camera and placement14.0/159.0/15
Reflections48.0/12015.5/120
Materials and scale7.0/108.5/10
Floor-damage reward0.0/100.0/10

Selfie

Different prompts

Claude Fable 5.169.0/100

Claude Fable 5.1: Selfie SVG benchmark
Researcher observations

The coral palette, friendly face, matte shading and cream arch create a coherent emblem. However, the mantle is elongated rather than compact, and the appendages spread mostly sideways and downward instead of forming an evenly spaced, flower-like starburst. Two thin hanging appendages weaken the thick-arm motif. Clean contours and balanced framing support the simple design.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Space Bunny Alpha79.5/100

Space Bunny Alpha: Selfie SVG benchmark
29 Sep onwardResult details ↗
Researcher observations

The expressive rabbits, lavender moon and diagonal ring create an appealing storybook composition with nearly all requested features. Glossy eyes and pearly highlights work well. The helmet leaves the towering ears unenclosed, the reaching arm has little joint definition, and the spread boots suggest hovering more clearly than pushing off. Repeated scalloped fur marks and broad gradients limit material depth; purple edge halos soften otherwise controlled silhouettes.

Prompt withheld

This prompt is held back to prevent benchmaxxing.

Compare category scores
CategoryClaude Fable 5.1Space Bunny Alpha
Prompt & likeness6.5/108.5/10
Anatomy & construction6.5/107.5/10
Space & placement7.5/107.5/10
Light & reflections6.5/108.0/10
Purposeful detail6.0/108.0/10
Artistry & character7.5/108.5/10
Materials & effects6.5/107.5/10
Visual integrity8.0/108.0/10

Beach

Different prompts

Claude Fable 5.175.0/100

Claude Fable 5.1: Beach SVG benchmark
Researcher observations

The colorful sunset, layered shoreline, animals, kite and beach toys fulfill the lively beach brief. Clean silhouettes and a balanced composition give the illustration character. Construction is simplified: the umbrella resembles a segmented fan, dolphins have weak water interaction, and the sun’s reflection forms a rigid widening wedge. Flat surfaces and sparse contact shadows limit depth.

Exact prompt

Create an SVG of a amazing beach scene. Sunset, animals, fun, birds, reflections Make it a masterpiece, no tools allowed

Space Bunny Alpha74.0/100

Space Bunny Alpha: Beach SVG benchmark
29 Sep onwardResult details ↗
Researcher observations

A cheerful, coherent beach illustration with a strong sunset focal point, varied animals and readable small accessories. Connected flamingo legs and grounded foreground objects support the scene. Construction remains schematic, especially the airborne marine animal; its jump lacks clear water displacement. The sun reflection is effective but geometrically rigid, while shadows and material textures provide limited depth.

Exact prompt

Create an SVG of a amazing beach scene. Sunset, animals, fun, birds, reflections

Compare category scores
CategoryClaude Fable 5.1Space Bunny Alpha
Prompt & likeness8.5/108.5/10
Anatomy & construction7.0/106.5/10
Space & placement7.0/107.5/10
Light & reflections7.0/107.0/10
Purposeful detail7.5/107.5/10
Artistry & character8.0/107.5/10
Materials & effects6.5/106.5/10
Visual integrity8.0/108.0/10

Mona Lisa

Different prompts

Claude Fable 5.156.5/100

Claude Fable 5.1: Mona Lisa SVG benchmark
Researcher observations

The dark clothing, crossed hands and hazy landscape establish the Mona Lisa composition. Replication is limited by the frontal, elongated face, wide eyes and simplified smile. Rounded, parallel fingers and unclear wrist transitions weaken the hands. Warm facial shading gives some volume, but broad garment shapes and scattered crack marks substitute for convincing folds and painterly detail.

Exact prompt

Replicate mona-lisa as SVG Make it a masterpiece, no tools allowed

Space Bunny Alpha57.3/100

Space Bunny Alpha: Mona Lisa SVG benchmark
29 Sep onwardResult details ↗
Researcher observations

The dark clothing, folded hands and muted landscape make the reference recognizable. Replication is limited by the broad frontal face, oversized head, explicit smile and simplified landscape. Arms connect coherently, but overlapping hands lack convincing finger construction. Soft gradients suggest volume and atmospheric depth; clothing folds and facial features remain schematic.

Exact prompt

Replicate mona-lisa as SVG

Compare category scores
CategoryClaude Fable 5.1Space Bunny Alpha
Prompt & likeness6.0/106.0/10
Anatomy & construction5.0/105.5/10
Space & placement6.0/106.0/10
Light & reflections6.0/106.0/10
Purposeful detail5.0/104.5/10
Artistry & character5.5/105.5/10
Materials & effects5.5/105.0/10
Visual integrity6.5/107.0/10

Raccoon

Different prompts

Claude Fable 5.170.8/100

Claude Fable 5.1: Raccoon SVG benchmark
Researcher observations

The raccoon rides on the dog's back, and the dog's extended foreleg reaches the jet ski controls. Expressive faces, a clear silhouette and sweeping spray make the action readable. Limb and handlebar overlaps weaken construction; broad shading provides limited volume, and the glowing sun has little corresponding reflection on the water. Clean vector shapes support an appealing but simplified illustration.

Exact prompt

Generate an SVG: A raccoon sits on a dog's back while the dog steers a jet ski Make it a masterpiece, no tools allowed

Space Bunny Alpha79.0/100

Space Bunny Alpha: Raccoon SVG benchmark
Before 29 SepResult details ↗
Researcher observations

The raccoon clearly rides on the dog's back, and the dog's paws reach a connected steering assembly. Expressive faces, controlled outlines and layered mountains make an appealing illustration. The seated anatomy and hull geometry are simplified, while the sunset has little corresponding reflection or directional shading. Curved spray conveys motion, although several splash ribbons look decorative.

Exact prompt

A raccoon sits on a dog's back while the dog steers a jet ski Make it a masterpiece

Compare category scores
CategoryClaude Fable 5.1Space Bunny Alpha
Prompt & likeness8.5/108.5/10
Anatomy & construction6.5/107.5/10
Space & placement7.0/108.0/10
Light & reflections5.5/107.0/10
Purposeful detail7.0/108.0/10
Artistry & character7.5/108.0/10
Materials & effects6.5/107.5/10
Visual integrity7.5/108.5/10

Pelican

Benchmax control

Outside General and Visual Intelligence.

Claude Fable 5.172.3/100

Claude Fable 5.1: Pelican SVG benchmark
Researcher observations

The pelican reads clearly, with an expressive face, prominent bill and appealing composition. Both legs connect to the body, but the far foot's pedal contact and the wing's steering grip remain unclear. Wheel alignment and background layers are coherent. Clean contours and feather lines give polish, while schematic machinery, limited surface texture and weak directional lighting constrain the finish.

Exact prompt

Generate an SVG of a pelican riding a bicycle Make it a masterpiece, no tools allowed

Space Bunny Alpha77.3/100

Space Bunny Alpha: Pelican SVG benchmark
29 Sep onwardResult details ↗
Researcher observations

The large pouched bill clearly identifies the pelican, and the balanced bicycle silhouette makes the action readable. Attached legs reach the crank area, but overlapping feet and crank lines leave pedal contact ambiguous. Consistent wheel scale, clean contours and a restrained coastal palette support an appealing composition. Lighting and surface treatment remain simple and mostly flat.

Exact prompt

Generate an SVG of a pelican riding a bicycle For this specific task your token limit is increased to 80,000 Juice: 2048

Compare category scores
CategoryClaude Fable 5.1Space Bunny Alpha
Prompt & likeness8.5/109.0/10
Anatomy & construction6.5/107.0/10
Space & placement7.5/108.0/10
Light & reflections6.0/106.5/10
Purposeful detail7.0/107.5/10
Artistry & character7.5/108.0/10
Materials & effects6.0/106.5/10
Visual integrity8.0/108.5/10