STEALTHMARK · HEAD TO HEAD

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GPT 5.6 Luna vs MISSINGNO.

GPT 5.6 Luna scores 1.4 points higher overall (39.4 vs 38.0). MISSINGNO. leads General Intelligence; GPT 5.6 Luna leads Visual Intelligence. MISSINGNO. scores higher on Ground Truth.

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Model guide ↗

Overall StealthMark

39.4/100
38.0/100

General Intelligence

25.9/100
33.6/100

Visual Intelligence

55.5/100
43.3/100

Newton's Mirror

Same task instructions

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

GPT 5.6 Luna27.7/100

GPT 5.6 Luna: Newton's Mirror SVG benchmark
Researcher observations

The room enclosure has coherent symmetric perspective, with the overhead panel, sphere and black aligned centrally. The sphere and airborne black occupy substantially lower positions than the reference framing, inconsistent with the prescribed camera aim. The diagonal crimson streak does not establish the required surface transport. Faint wall sphere images provide limited mirrored correspondence, but the shallow floor image, missing receding chains, absent nested sphere imagery and sparse emitter mapping leave most reflection structure unsupported.

Benchmark task

A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.

MISSINGNO.24.1/100

MISSINGNO.: Newton's Mirror SVG benchmark
Researcher observations

The centered sphere, separate airborne black blob and cyan-above-crimson ordering provide limited valid structure. The colored beads do not establish the required impact and transport histories. One dim floor image supports a small part of the optical system, while the defining wall repetitions, nested sphere imagery and emitter mappings are missing. Rounded volume and some gloss earn material credit, tempered by soft surface appearance and excessive paint-bead scale.

Benchmark task

A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.

Compare category scores
CategoryGPT 5.6 LunaMISSINGNO.
State at 600 ms15.0/2511.5/25
Camera and placement4.0/157.0/15
Reflections3.5/12012.0/120
Materials and scale10.0/105.5/10
Floor-damage reward0.0/100.0/10

Selfie

Different task instructions

GPT 5.6 Luna59.8/100

GPT 5.6 Luna: Selfie SVG benchmark
Researcher observations

Six pale, outward-facing heads and six rounded lobes make the knot recognizable. The central hexagonal opening remains clear. However, broad gray crossing panels flatten the weave, several inner joins resemble capped strips, and sparse oversized scale marks leave the bodies looking more like decorated ribbons than living snakes.

Benchmark task

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.

MISSINGNO.49.7/100

MISSINGNO.: Selfie SVG benchmark
Researcher observations

An appealing purple character with a readable pleased expression and raised-moustache joke. Smooth shading and clean contours support the simple design, but indistinct mitten grips, minimally textured curls and an uncompressed strap weaken the requested physical interaction. The jelly suggests gloss more convincingly than translucency.

Benchmark task

A glossy purple jelly struggles with an oversized fake moustache at a playful checkpoint. The scene tests comic expression, physical contact and the appearance of a soft translucent body.

Compare category scores
CategoryGPT 5.6 LunaMISSINGNO.
Task & likeness7.5/105.5/10
Anatomy & construction6.0/104.5/10
Space & placement6.5/106.0/10
Light & reflections5.0/105.5/10
Purposeful detail5.5/104.5/10
Artistry & character6.0/104.5/10
Materials & effects5.0/104.0/10
Visual integrity6.0/106.0/10

Mona Lisa

Different task instructions

GPT 5.6 Luna39.1/100

GPT 5.6 Luna: Mona Lisa SVG benchmark
Researcher observations

The central portrait, dark clothing, crossed hands and muted landscape clearly evoke Mona Lisa. Replication is limited by the elongated face, conspicuous eyes and simplified smile. Overlapping fingers have uncertain anatomy, while broad gradients and heavy outlines flatten the portrait. The composition and restrained palette remain coherent.

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

MISSINGNO.28.1/100

MISSINGNO.: Mona Lisa SVG benchmark
Researcher observations

Clean contours, connected body forms and gentle gradients support a basic, coherent portrait. Likeness remains weak: the face dominates the body, the seated angle is lost, and crossed hands become dark lobes without traceable wrists or fingers. Readable facial details add some drawing complexity, but clothing, landscape and material treatment remain sparse.

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

Compare category scores
CategoryGPT 5.6 LunaMISSINGNO.
Task & likeness3.5/101.5/10
Anatomy & construction3.5/102.5/10
Space & placement4.0/102.5/10
Light & reflections4.5/103.0/10
Purposeful detail4.0/102.0/10
Artistry & character4.0/103.5/10
Materials & effects3.5/102.0/10
Visual integrity4.5/106.0/10

Beach

Different task instructions

GPT 5.6 Luna48.6/100

GPT 5.6 Luna: Beach SVG benchmark
Researcher observations

The warm sunset, palm silhouette and varied beach activities create an appealing, readable composition. Animals, birds and a broad sun reflection satisfy the brief. Drawing remains elementary: angular airborne sea animals lack splash or convincing motion, the crab's claws are awkwardly constructed, and repeated reflection bands suggest a stepped platform. Clean outlines and pleasant colors exceed the anatomical and spatial sophistication.

Benchmark task

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

MISSINGNO.43.9/100

MISSINGNO.: Beach SVG benchmark
Researcher observations

A coherent sunset beach with clear requested subjects, balanced framing and clean shapes. The aligned solar reflection and warm gradients establish atmosphere. Primitive animal construction, ambiguous furniture, sparse depth cues and minimally developed surfaces limit its drawing complexity and physical richness.

Benchmark task

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

Compare category scores
CategoryGPT 5.6 LunaMISSINGNO.
Task & likeness7.5/107.0/10
Anatomy & construction4.0/104.0/10
Space & placement5.5/106.5/10
Light & reflections4.0/105.0/10
Purposeful detail6.5/103.0/10
Artistry & character4.0/103.0/10
Materials & effects4.0/105.0/10
Visual integrity3.5/103.5/10

Ground Truth

Same task instructions

GPT 5.6 Luna30.0/100

GPT 5.6 Luna: Ground Truth SVG benchmark
Benchmark task

A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.

MISSINGNO.44.1/100

MISSINGNO.: Ground Truth SVG benchmark
Benchmark task

A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.

Raccoon

Different task instructions

GPT 5.6 Luna65.0/100

GPT 5.6 Luna: Raccoon SVG benchmark
Researcher observations

Expressive animals, a striped tail and clean outlines make the scene appealing and readable. The raccoon sits convincingly on the dog's back, but the overlapping steering paws are ambiguous and the control stem stops above the hull. Broad wake shapes suggest motion; the glowing sun lacks a corresponding water reflection.

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.

MISSINGNO.57.5/100

MISSINGNO.: Raccoon SVG benchmark
Researcher observations

The requested interaction reads clearly through recognizable animals, expressive faces and a coherent hull-water relationship. Clean curves and readable accessories give the cartoon polish. Partly unresolved grips and supporting contacts limit physical construction; modest shape complexity, weak directional lighting and schematic water constrain its finish.

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.

Compare category scores
CategoryGPT 5.6 LunaMISSINGNO.
Task & likeness7.0/108.0/10
Anatomy & construction6.5/105.0/10
Space & placement7.0/105.5/10
Light & reflections6.0/105.0/10
Purposeful detail7.5/106.0/10
Artistry & character5.5/105.0/10
Materials & effects6.5/104.5/10
Visual integrity6.5/107.0/10

Pelican

Different task instructions

GPT 5.6 Luna69.8/100

GPT 5.6 Luna: Pelican SVG benchmark
Researcher observations

A recognizable pelican cyclist with an expressive profile, balanced composition and controlled outlines. Head, neck and torso connect coherently. The bicycle wheels and frame are convincing, but overlapping feet obscure pedal contact, the drivetrain lacks a clear chain, and the wing's handlebar grip is schematic. Atmospheric color succeeds more strongly than directional lighting or material depth.

Benchmark task

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

MISSINGNO.58.8/100

MISSINGNO.: Pelican SVG benchmark
Researcher observations

A coherent, cheerful illustration with recognizable pelican features, balanced composition, clean contours and useful small details. Its controlled curves and layered wheels demonstrate competent drawing skill. Ambiguous pedal and steering contacts, sparse drivetrain construction and weak directional lighting limit the riding mechanics and finish.

Benchmark task

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

Compare category scores
CategoryGPT 5.6 LunaMISSINGNO.
Task & likeness8.5/107.0/10
Anatomy & construction5.5/105.5/10
Space & placement7.5/106.0/10
Light & reflections6.5/105.0/10
Purposeful detail7.5/105.5/10
Artistry & character6.5/106.0/10
Materials & effects7.0/104.5/10
Visual integrity7.5/106.5/10