STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GPT-6.1 Terra Low vs Grok 4.7

Grok 4.7 leads GPT-6.1 Terra Low by 5.9 points on StealthMark, 47.2 to 41.3. It leads on 5 of 9 benchmarks, including both games, and GPT-6.1 Terra Low on 4. Grok 4.7 scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

41.3/100Overall rank 35/55
47.2/100Overall rank 23/55

General Intelligence

34.3/100
48.4/100

Visual Intelligence

53.1/100
44.8/100

BENCHMARK BY BENCHMARK

Where each model leads

  • GPT-6.1 Terra Low
  • Grok 4.7
  • Other models
  • Median

DATASHEET

Specs and pricing

  • GPT-6.1 Terra Low
  • Grok 4.7
  • Other models
  • Median
PricePer 1M output tokens, input below
GPT-6.1 Terra Low: No list priceGrok 4.7: $6$2 input
Context windowTokens per request, max output below
GPT-6.1 Terra Low: Not publishedGrok 4.7: 500K
Output speedTokens per second, our measurement
GPT-6.1 Terra Low: Not measuredGrok 4.7: 185tokens/s
Developer
Not publishedSpaceXAI
Released
Not published21 Sep 2026
Origin
Not publishedUnited States
Input → output
Not publishedText, image → text

Full datasheets, every price and sourceGrok 4.7 ↗

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.

GPT-6.1 Terra Low 36.1/100Rank 26/51

Survived 1 of 3
Foresight: complete playing field
Level 39 ptsTurn 20 / 20

Grok 4.7 72.6/100Rank 3/51

Survived 3 of 3
Foresight: complete playing field
Level 316 ptsTurn 20 / 20

Points per level

LevelGPT-6.1 Terra LowGrok 4.7
Level 1Second Thoughts
4 ptsOut of lives
25 ptsSurvived
Level 2Pressure Pot
8 ptsOut of lives
13 ptsSurvived
Level 3Hide or Flight
9 ptsSurvived
16 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.

GPT-6.1 Terra Low 62.4/100Rank 23/52

Cleared 4 of 5
Latch: complete playing field
Level 520.6 ptsTurn 27 / 40

Grok 4.7 65.4/100Rank 21/52

Cleared 4 of 5
Latch: complete playing field
Level 520.4 ptsTurn 28 / 40

Points per level

LevelGPT-6.1 Terra LowGrok 4.7
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.2 ptsCleared
9.8 ptsCleared
Level 3Relay vault
18.8 ptsCleared
11.6 ptsFinished early
Level 4Passing bay
10.2 ptsFinished early
18.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.6 ptsCleared
20.4 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

GPT-6.1 Terra Low

Deformed colored paint and a separate airborne black body establish readable interaction history. Cyan has travelled too far, framing differs substantially, and the mirror system supplies only elementary bands and oval copies. Missing recursive geometry, nested spherical imagery and emitter mapping remain the dominant weaknesses.

Grok 4.7

Some sphere reflections are correctly placed, with useful size progression and a floor image. Their overlapping side continuations and inverted floor paint order provide additional local optical cues. The gross paint sequence is recognizable, although crimson is a little too low. Incorrect lamp projections and absent nested and receding imagery still leave the mirror system largely incomplete.

Score breakdown

CategoryGPT-6.1 Terra LowGrok 4.7
State at 600 ms22.0/2523.0/25
Camera and placement4.0/1512.5/15
Reflections10.0/12026.0/120
Materials and scale6.0/106.5/10
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

GPT-6.1 Terra Low

Six attached outward-facing heads, delicate scales and soft ivory shading establish an orderly decorative motif. Separate paddle-shaped bodies replace the required interlocking loops and leave no enclosed central hexagon. Surface detail provides interest, but repeated simple forms, schematic faces and limited anatomical modeling constrain the result.

Grok 4.7

The bold spiral dominates an appealing, restrained silhouette, with crisp angular turns and subtle charcoal highlights. However, a visible background gap separates the shell from the body, making the shell appear suspended. The connected head and delicate eye stalks read clearly, while shading and small features remain simple.

Score breakdown

CategoryGPT-6.1 Terra LowGrok 4.7
Task & likeness4.0/107.0/10
Anatomy & construction3.5/105.0/10
Space & placement4.5/105.5/10
Light & reflections5.5/104.0/10
Purposeful detail5.5/102.5/10
Artistry & character5.0/103.5/10
Materials & effects5.5/102.5/10
Visual integrity4.0/107.5/10

Benchmark task

GPT-6.1 Terra Low

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.

Grok 4.7

A dark snail with a geometric spiral shell tests silhouette, curved construction and restrained material shading.

Mona Lisa

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

GPT-6.1 Terra Low

A recognizable, coherent portrait with purposeful facial detail, warm local volume and layered scenery. The frontal pose, enlarged face, merged hands and shallow clothing construction substantially limit replication and drawing skill. The visible successes support retaining the current assessment.

Grok 4.7

Dark clothing, overlapping hands and a restrained smile make the reference recognizable. The broad frontal face, elongated neck and oversized head weaken likeness and anatomical proportion; rounded hands lack convincing fingers. Gentle facial shading suggests volume, while clothing and landscape remain flat. Angular veil overlaps and a hard horizontal background boundary weaken the finish.

Score breakdown

CategoryGPT-6.1 Terra LowGrok 4.7
Task & likeness5.0/102.0/10
Anatomy & construction4.5/102.0/10
Space & placement5.0/103.0/10
Light & reflections6.0/101.5/10
Purposeful detail5.0/103.0/10
Artistry & character5.5/102.5/10
Materials & effects5.0/102.0/10
Visual integrity6.0/103.0/10

Benchmark task

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

Beach

Same task instructions

Creativity, perspective and visual beauty.

The judgment

GPT-6.1 Terra Low

A coherent sunset scene demonstrates the beach, animals, birds and reflections. Flowing silhouettes, warm color transitions and intact attachments are its strongest properties. Simplified anatomy, the turtle's elevated viewing angle and symbolic surface effects constrain drawing complexity and physical depth.

Grok 4.7

The warm sunset, blue water and scattered beach activities create a cheerful, readable composition. Animals and equipment use basic silhouettes, with limited anatomical detail and grounding. The sun reflection forms a rigid tapered strip, and foreground objects lack cast shadows. Clean shapes support the illustration, but depth, materials and drawing complexity remain modest.

Score breakdown

CategoryGPT-6.1 Terra LowGrok 4.7
Task & likeness8.0/107.5/10
Anatomy & construction5.5/104.5/10
Space & placement5.5/105.5/10
Light & reflections6.5/106.0/10
Purposeful detail6.0/105.0/10
Artistry & character5.0/103.5/10
Materials & effects5.5/104.5/10
Visual integrity7.5/106.0/10

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

GPT-6.1 Terra Low

This benchmark has not been assessed yet.

Grok 4.7

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

Same task instructions

Scene composition and interacting subjects.

The judgment

GPT-6.1 Terra Low

Recognizable animals, a coherent craft and sweeping wake make an appealing cartoon. Basic limb construction, weakly demonstrated raccoon seating and limited shared perspective constrain the scene. Small identifying details work well, while lighting and materials remain broadly graphic.

Grok 4.7

The raccoon rides clearly on the dog's back, and expressive faces, bright colors and a readable orange hull create a playful composition. Steering is unresolved: the dog's visible paws rest on the deck rather than grasping the controls. Simple body shapes and ribbonlike wake limit construction and movement. The glowing sun produces little corresponding illumination or reflection.

Score breakdown

CategoryGPT-6.1 Terra LowGrok 4.7
Task & likeness6.5/107.0/10
Anatomy & construction5.0/104.5/10
Space & placement5.5/106.5/10
Light & reflections4.5/104.5/10
Purposeful detail6.0/105.5/10
Artistry & character5.0/105.5/10
Materials & effects5.0/105.5/10
Visual integrity6.0/103.5/10

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

Same task instructions

Subject construction and spatial relationships.

The judgment

GPT-6.1 Terra Low

A coherent coastal illustration with a distinctive pelican, controlled contours and clearly organised bicycle wheels. Visible saddle support and shaped neck and wing contours earn credit beyond basic geometric construction. Rubbery legs, unresolved pedal contacts and absent steering contact limit the riding action. Lighting and materials remain restrained and spatially shallow.

Grok 4.7

The pelican reads clearly through its long bill, throat pouch and curved neck. Clean pastel shapes and balanced scenery make an appealing illustration. The riding mechanism is less convincing: feet lack clear pedal contact, steering is unresolved, and the frame lacks a coherent drivetrain. Simple shading and sparse feather detail limit depth and finish.

Score breakdown

CategoryGPT-6.1 Terra LowGrok 4.7
Task & likeness7.0/107.5/10
Anatomy & construction5.5/104.5/10
Space & placement6.0/106.5/10
Light & reflections5.5/106.0/10
Purposeful detail6.5/106.0/10
Artistry & character6.0/105.5/10
Materials & effects6.0/105.5/10
Visual integrity6.0/106.0/10

Benchmark task

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