STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GPT-6.1 Terra vs Grok 4.7

GPT-6.1 Terra leads Grok 4.7 by 13.2 points on StealthMark, 60.4 to 47.2. It leads on 8 of 9 benchmarks, including Latch, and Grok 4.7 on 1, including Foresight. GPT-6.1 Terra scores higher on Mona Lisa, with its largest category advantage in anatomy & construction.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

60.4/100Overall rank 9/54
47.2/100Overall rank 23/54

General Intelligence

58.0/100
48.4/100

Visual Intelligence

64.9/100
44.8/100

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

  • Grok 4.7

BENCHMARK BY BENCHMARK

Where each model leads

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

DATASHEET

Specs and pricing

GPT-6.1 Terra scores higher on StealthMark, is 20% cheaper per output token and takes 2.1× more context.

  • GPT-6.1 Terra
  • Grok 4.7
  • Other models
  • Median
PricePer 1M output tokens, input below
GPT-6.1 Terra: $520% cheaper$1 inputGrok 4.7: $6$2 input
Context windowTokens per request, max output below
GPT-6.1 Terra: 1.05M2.1× larger128K max outputGrok 4.7: 500K
Output speedTokens per second, our measurement
GPT-6.1 Terra: Not measuredGrok 4.7: 185tokens/s
Developer
OpenAISpaceXAI
Released
26 Oct 202621 Sep 2026
Origin
United StatesBoth
Input → output
Text, image → textBoth

Full datasheets, every price and sourceGPT-6.1 Terra ↗Grok 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 62.0/100Rank 9/50

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

Grok 4.7 72.6/100Rank 3/50

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

Points per level

LevelGPT-6.1 TerraGrok 4.7
Level 1Second Thoughts
21 ptsSurvived
25 ptsSurvived
Level 2Pressure Pot
9 ptsOut of lives
13 ptsSurvived
Level 3Hide or Flight
15 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 77.7/100Rank 12/51

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

Grok 4.7 65.4/100Rank 21/51

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

Points per level

LevelGPT-6.1 TerraGrok 4.7
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
19.2 ptsCleared
11.6 ptsFinished early
Level 4Passing bay
17.8 ptsClearedFinished early · 3 beacons left
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

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.

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 TerraGrok 4.7
State at 600 ms23.0/2523.0/25
Camera and placement11.0/1512.5/15
Reflections33.0/12026.0/120
Materials and scale7.5/106.5/10
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

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.

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 TerraGrok 4.7
Task & likeness7.5/107.0/10
Anatomy & construction6.5/105.0/10
Space & placement6.5/105.5/10
Light & reflections6.0/104.0/10
Purposeful detail6.5/102.5/10
Artistry & character6.5/103.5/10
Materials & effects6.0/102.5/10
Visual integrity6.0/107.5/10

Benchmark task

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.

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

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.

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 TerraGrok 4.7
Task & likeness5.5/102.0/10
Anatomy & construction6.5/102.0/10
Space & placement4.5/103.0/10
Light & reflections6.5/101.5/10
Purposeful detail6.0/103.0/10
Artistry & character6.0/102.5/10
Materials & effects6.0/102.0/10
Visual integrity6.5/103.0/10

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

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.

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 TerraGrok 4.7
Task & likeness8.5/107.5/10
Anatomy & construction7.5/104.5/10
Space & placement6.5/105.5/10
Light & reflections5.5/106.0/10
Purposeful detail7.5/105.0/10
Artistry & character7.0/103.5/10
Materials & effects6.5/104.5/10
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

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

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.

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 TerraGrok 4.7
Task & likeness6.5/107.0/10
Anatomy & construction5.5/104.5/10
Space & placement6.0/106.5/10
Light & reflections5.0/104.5/10
Purposeful detail7.0/105.5/10
Artistry & character6.0/105.5/10
Materials & effects6.0/105.5/10
Visual integrity7.0/103.5/10

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

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.

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 TerraGrok 4.7
Task & likeness7.0/107.5/10
Anatomy & construction7.0/104.5/10
Space & placement6.0/106.5/10
Light & reflections5.5/106.0/10
Purposeful detail7.0/106.0/10
Artistry & character6.5/105.5/10
Materials & effects5.5/105.5/10
Visual integrity6.0/106.0/10

Benchmark task

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