STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Glyph Cluster vs GPT-6.1 Terra

GPT-6.1 Terra leads Glyph Cluster by 41.5 points on StealthMark, 60.4 to 18.9. It leads on all 9 benchmarks. GPT-6.1 Terra scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
Model guide ↗
All results ↗

Overall StealthMark

18.9/100Overall rank 49/54
60.4/100Overall rank 9/54

General Intelligence

12.0/100
58.0/100

Visual Intelligence

29.8/100
64.9/100

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

Open or local

BENCHMARK BY BENCHMARK

Where each model leads

  • Glyph Cluster
  • GPT-6.1 Terra
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Glyph Cluster
  • GPT-6.1 Terra
  • Other models
  • Median
PricePer 1M output tokens, input below
Glyph Cluster: No list priceGPT-6.1 Terra: $5$1 input
Context windowTokens per request, max output below
Glyph Cluster: Not publishedGPT-6.1 Terra: 1.05M128K max output
Output speedTokens per second, our measurement
Glyph Cluster: 69tokens/sGPT-6.1 Terra: Not measured
Developer
Not publishedOpenAI
Released
Not published26 Oct 2026
Origin
Not publishedUnited States
Input → output
Not publishedText, image → text

Full datasheets, every price and sourceGPT-6.1 Terra ↗

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.

Glyph Cluster 6.4/100Rank 47/50

Survived 0 of 3
Foresight: complete playing field
Level 33 ptsTurn 5 / 20

GPT-6.1 Terra 62.0/100Rank 9/50

Survived 2 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Points per level

LevelGlyph ClusterGPT-6.1 Terra
Level 1Second Thoughts
3 ptsOut of lives
21 ptsSurvived
Level 2Pressure Pot
3 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
3 ptsOut of lives
15 ptsSurvived

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.

Glyph Cluster 3.6/100Rank 47/51

Cleared 1 of 5
Latch: complete playing field
Level 59 ptsTurn 25 / 40

GPT-6.1 Terra 77.7/100Rank 12/51

Cleared 5 of 5
Latch: complete playing field
Level 520.6 ptsTurn 27 / 40

Points per level

LevelGlyph ClusterGPT-6.1 Terra
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
2 ptsOut of turns
9.8 ptsCleared
Level 3Relay vault
4.2 ptsFinished early
19.2 ptsCleared
Level 4Passing bay
1 ptsOut of turns
17.8 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
9 ptsFinished early
20.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Glyph Cluster

Rounded sphere volume, compact colored forms and crimson-below-cyan ordering provide limited agreement. The visible paint does not establish the required interaction history, the sphere and black blob are displaced from the prescribed projection, and most of the defining mirror-room structure is missing or unresolved. The faint reflection echoes earn limited optical credit.

GPT-6.1 Terra

The sphere, airborne black and first reflected silhouettes preserve important geometry within the portrait frame. Paint deformation, contact order and forward transport are supported, with a small crimson endpoint overshoot. Major optical omissions dominate: short finite reflection sequences and smooth bands replace extensive, spatially ordered mirror imagery. Dark gloss and crisp upper emitter shapes provide partial material credit.

Score breakdown

CategoryGlyph ClusterGPT-6.1 Terra
State at 600 ms5.0/2523.0/25
Camera and placement3.0/1511.0/15
Reflections8.0/12033.0/120
Materials and scale3.0/107.5/10
Floor-damage reward0.0/100.0/10

Benchmark task

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

Selfie

Different task instructions

Visual construction and creative interpretation.

The judgment

Glyph Cluster

A charming palette and three expressive companions make the concept recognizable. The dominant paper enclosure overwhelms the small group, the plum character lacks a clear brace silhouette, and the cuddle remains difficult to trace. Sparse furnishings, ambiguous folds and generalized shading limit the promised lived-in richness and tactile depth.

GPT-6.1 Terra

A balanced serpent emblem with six attached outward heads, delicate scales and softly rounded bodies. Its compact silhouette reads clearly, but central routing does not establish every alternating crossing or crisp inward corner. Repetitive texture, limited facial anatomy and weak contact shadows constrain its organic character.

Score breakdown

CategoryGlyph ClusterGPT-6.1 Terra
Task & likeness3.5/107.5/10
Anatomy & construction2.5/106.5/10
Space & placement4.0/106.5/10
Light & reflections3.5/106.0/10
Purposeful detail4.5/106.5/10
Artistry & character3.0/106.5/10
Materials & effects2.0/106.0/10
Visual integrity3.0/106.0/10

Benchmark task

Glyph Cluster

Punctuation-shaped companions gather inside a curled paper home. The scene tests expressive silhouettes, close interaction and the coherence of a detailed miniature environment.

GPT-6.1 Terra

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.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Glyph Cluster

The portrait has a continuous body silhouette, attached sleeves and hands, and simple landscape depth. Its oversized pale head enclosure nearly erases the expression, while separated fists, ochre clothing and frontal construction weaken Mona Lisa likeness. Sparse detail, flat materials and ambiguous facial layers leave the drawing seriously unresolved.

GPT-6.1 Terra

A recognizable interpretation with developed facial shading, shaped sleeve folds and purposeful small features. These strengths support modest upward calibration, while the frontal torso, elongated proportions, schematic finger joints and unresolved seated support keep replication and construction uneven.

Score breakdown

CategoryGlyph ClusterGPT-6.1 Terra
Task & likeness2.0/105.5/10
Anatomy & construction0.5/106.5/10
Space & placement2.0/104.5/10
Light & reflections1.0/106.5/10
Purposeful detail1.0/106.0/10
Artistry & character0.5/106.0/10
Materials & effects1.0/106.0/10
Visual integrity3.0/106.5/10

Benchmark task

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

Beach

Different task instructions

Creativity, perspective and visual beauty.

The judgment

Glyph Cluster

A cheerful, recognizable beach illustration with playful accessories and mostly clean silhouettes. Sunset colors and soft glow supply atmosphere, but abbreviated anatomy, unexplained airborne animals, weak ground contact and absent water reflections limit physical coherence. Small details add interest without consistently resolving construction or materials.

GPT-6.1 Terra

A coherent sunset illustration with clear prompt fulfillment, controlled framing and varied, purposeful small details. Simplified joints, frontal staging, flattened animal forms and weakly directional shadows limit its anatomical, spatial and physical sophistication.

Score breakdown

CategoryGlyph ClusterGPT-6.1 Terra
Task & likeness6.0/108.5/10
Anatomy & construction4.0/107.5/10
Space & placement5.0/106.5/10
Light & reflections4.0/105.5/10
Purposeful detail5.5/107.5/10
Artistry & character4.0/107.0/10
Materials & effects4.0/106.5/10
Visual integrity5.0/107.5/10

Benchmark task

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

Ground Truth

Same task instructions

Physical reasoning, light and visual reconstruction.

The judgment

Glyph Cluster

This benchmark has not been assessed yet.

GPT-6.1 Terra

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 instructions

Scene composition and interacting subjects.

The judgment

Glyph Cluster

Recognizable animals and clean shapes give the scene charm, but the requested steering action is visibly incomplete. Simplified joints, weak vehicle construction and uncertain water contact limit physical coherence. Flat lighting, sparse functional detail and a small focal group keep the illustration basic despite its tidy edges.

GPT-6.1 Terra

A coherent cartoon with expressive animals, readable steering and a clear wake. Fine facial and hull details reward inspection. The main limits are the boatlike craft, simplified joints, weakly braced frontal raccoon and minimal directional lighting or material depth.

Score breakdown

CategoryGlyph ClusterGPT-6.1 Terra
Task & likeness5.0/106.5/10
Anatomy & construction3.0/105.5/10
Space & placement4.0/106.0/10
Light & reflections2.5/105.0/10
Purposeful detail3.5/107.0/10
Artistry & character3.0/106.0/10
Materials & effects3.0/106.0/10
Visual integrity5.5/107.0/10

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 instructions

Subject construction and spatial relationships.

The judgment

Glyph Cluster

A readable cartoon with open framing, aligned bicycle wheels and modest atmospheric effects. Pelican likeness is approximate, while the narrow neck, crowded feet, absent steering contact and unclear drivetrain weaken the riding action. Clean shapes help presentation, but shallow space and inconsistent shading limit the finish.

GPT-6.1 Terra

A coherent pelican cyclist with expressive proportions, purposeful feather detail and developed bicycle machinery. Continuous body contours, aligned wheels and readable pedal contacts support the scene. Simplified articulation, shallow modelling and an unresolved steering connection limit construction and placement.

Score breakdown

CategoryGlyph ClusterGPT-6.1 Terra
Task & likeness6.0/107.0/10
Anatomy & construction3.0/107.0/10
Space & placement6.0/106.0/10
Light & reflections3.5/105.5/10
Purposeful detail4.0/107.0/10
Artistry & character3.0/106.5/10
Materials & effects4.5/105.5/10
Visual integrity6.0/106.0/10

Benchmark task

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