STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GPT-6.1 Terra Low vs Ling 3.1 Flash

Ling 3.1 Flash leads GPT-6.1 Terra Low by 0.9 points on StealthMark, 42.2 to 41.3. It leads on 6 of 9 benchmarks and GPT-6.1 Terra Low on 3, including both games. Ling 3.1 Flash scores higher on Newton's Mirror, with its largest category advantage in camera and placement.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

41.3/100Overall rank 35/55
42.2/100Overall rank 33/55

General Intelligence

34.3/100
35.5/100

Visual Intelligence

53.1/100
51.2/100

Open or local

Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • GPT-6.1 Terra Low
  • Ling 3.1 Flash
  • Other models
  • Median

DATASHEET

Specs and pricing

  • GPT-6.1 Terra Low
  • Ling 3.1 Flash
  • Other models
  • Median
PricePer 1M output tokens, input below
GPT-6.1 Terra Low: No list priceLing 3.1 Flash: $0.90$0.30 input
Context windowTokens per request, max output below
GPT-6.1 Terra Low: Not publishedLing 3.1 Flash: 256K
Output speedTokens per second, our measurement
GPT-6.1 Terra Low: Not measuredLing 3.1 Flash: 115tokens/s
SizeTotal and active parameters
GPT-6.1 Terra Low: Not disclosedLing 3.1 Flash: 560B25B active
Developer
Not publishedInclusionAI
Released
Not published29 Sep 2026
Origin
Not publishedChina
Input → output
Not publishedText → text
Architecture
Not publishedHybrid-linear MoE; 72 layers (63 KDA, 9 gated MLA); 512 routed experts, 8 selected and 1 shared.

Full datasheets, every price and sourceLing 3.1 Flash ↗

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

Ling 3.1 Flash 43.1/100Rank 46/511 of 3 levels

1 of 3 played
Foresight: complete playing field
Level 26 ptsTurn 14 / 18

Points per level

LevelGPT-6.1 Terra LowLing 3.1 Flash
Level 1Second Thoughts
4 ptsOut of lives
Pending
Level 2Pressure Pot
8 ptsOut of lives
6 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
Not played

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

Ling 3.1 Flash 45.9/100Rank 40/523 of 5 levels

3 of 5 played
Latch: complete playing field
Level 49.8 ptsTurn 21 / 40

Points per level

LevelGPT-6.1 Terra LowLing 3.1 Flash
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.2 ptsCleared
9.4 ptsCleared
Level 3Relay vault
18.8 ptsCleared
Pending
Level 4Passing bay
10.2 ptsFinished early
9.8 ptsFinished early
Level 5Second thoughts
20.6 ptsCleared
Not played

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.

Ling 3.1 Flash

Central placement, separate airborne black paint and the elongated crimson coating earn substantial state and placement credit. Cyan contact remains unresolved. A few isolated sphere images provide limited optical evidence, while the defining repeated mirror structure is missing. Readable opaque metallic volume and restrained paint scale justify increased material credit. Core: 61.5/170; including the floor reward: 61.5/180.

Score breakdown

CategoryGPT-6.1 Terra LowLing 3.1 Flash
State at 600 ms22.0/2522.0/25
Camera and placement4.0/1513.5/15
Reflections10.0/12018.0/120
Materials and scale6.0/107.0/10
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.

Ling 3.1 Flash

An appealing, coherent storybook ant with a clear expression, complete silhouette and readable signal mechanism. Clean curves and warm accents support the composition, while simplified joints, schematic hardware, limited material differentiation and modest light interaction constrain its finish.

Score breakdown

CategoryGPT-6.1 Terra LowLing 3.1 Flash
Task & likeness4.0/107.5/10
Anatomy & construction3.5/107.5/10
Space & placement4.5/107.0/10
Light & reflections5.5/107.5/10
Purposeful detail5.5/107.0/10
Artistry & character5.0/107.0/10
Materials & effects5.5/106.5/10
Visual integrity4.0/108.0/10

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.

Ling 3.1 Flash

An ant tending signals in a miniature workshop tests insect anatomy, purposeful gestures and the placement of small objects in a lit environment.

Mona Lisa

Different 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.

Ling 3.1 Flash

A basic, uneven Mona Lisa interpretation with a clear facial focal point, articulated eyes and modest tonal volume. Weak likeness, oversized head proportions, unclear shoulders, curled bare arms and indistinct hands limit replication. The compressed composition and rectangular torso weaken an otherwise coherent earthy palette.

Score breakdown

CategoryGPT-6.1 Terra LowLing 3.1 Flash
Task & likeness5.0/102.0/10
Anatomy & construction4.5/101.5/10
Space & placement5.0/104.0/10
Light & reflections6.0/103.5/10
Purposeful detail5.0/103.5/10
Artistry & character5.5/102.0/10
Materials & effects5.0/101.5/10
Visual integrity6.0/102.0/10

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.

Ling 3.1 Flash

A coherent sunset illustration with harmonious color, clean silhouettes and readable beach details. Its calm composition works well, while playful activity is modest. Simplified animal anatomy, shallow shoreline layering, repetitive foliage and a geometric reflection limit drawing sophistication and naturalism.

Score breakdown

CategoryGPT-6.1 Terra LowLing 3.1 Flash
Task & likeness8.0/107.5/10
Anatomy & construction5.5/106.0/10
Space & placement5.5/107.0/10
Light & reflections6.5/107.0/10
Purposeful detail6.0/106.5/10
Artistry & character5.0/106.5/10
Materials & effects5.5/106.5/10
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.

Ling 3.1 Flash

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.

Ling 3.1 Flash

An appealing sunset cartoon with recognizable animals, expressive faces and coherent landscape layers. The sky and warm water streaks provide its strongest rendering. Ambiguous seated support, stiff forelegs, a shallow hull and an unclear steering connection limit construction. Clean shapes and readable accessories add finish, while restrained spray and flat surfaces limit material and motion effects.

Score breakdown

CategoryGPT-6.1 Terra LowLing 3.1 Flash
Task & likeness6.5/107.5/10
Anatomy & construction5.0/105.5/10
Space & placement5.5/107.0/10
Light & reflections4.5/107.0/10
Purposeful detail6.0/107.0/10
Artistry & character5.0/105.5/10
Materials & effects5.0/105.5/10
Visual integrity6.0/106.0/10

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

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.

Ling 3.1 Flash

A clean, appealing pelican illustration with a readable bicycle and coherent landscape. Bill shading, feather layers and faint wheel shadows provide modest depth. Uncertain pedal contact, simplified leg construction and limited material rendering keep the result within competent illustration quality.

Score breakdown

CategoryGPT-6.1 Terra LowLing 3.1 Flash
Task & likeness7.0/107.5/10
Anatomy & construction5.5/105.5/10
Space & placement6.0/107.0/10
Light & reflections5.5/106.5/10
Purposeful detail6.5/106.0/10
Artistry & character6.0/106.5/10
Materials & effects6.0/106.5/10
Visual integrity6.0/106.0/10

Benchmark task

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