STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GPT-6.1 Terra Low vs Kimi K3

Kimi K3 leads GPT-6.1 Terra Low by 9.3 points on StealthMark, 50.6 to 41.3. It leads on 7 of 9 benchmarks, including Foresight, and GPT-6.1 Terra Low on 2, including Latch. Kimi K3 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
50.6/100Overall rank 16/55

General Intelligence

34.3/100
44.4/100

Visual Intelligence

53.1/100
61.4/100

Open or local

Open modelKimi K3 License

BENCHMARK BY BENCHMARK

Where each model leads

  • GPT-6.1 Terra Low
  • Kimi K3
  • Other models
  • Median

DATASHEET

Specs and pricing

  • GPT-6.1 Terra Low
  • Kimi K3
  • Other models
  • Median
PricePer 1M output tokens, input below
GPT-6.1 Terra Low: No list priceKimi K3: $10.80$0.24 input
Context windowTokens per request, max output below
GPT-6.1 Terra Low: Not publishedKimi K3: 1M1M max output
Output speedTokens per second, our measurement
GPT-6.1 Terra Low: Not measuredKimi K3: 115tokens/s
SizeTotal and active parameters
GPT-6.1 Terra Low: Not disclosedKimi K3: 2.8T104B active
Developer
Not publishedMoonshot AI
Released
Not published16 Jul 2026
Origin
Not publishedChina
Input → output
Not publishedText, image → text
Architecture
Not publishedMixture-of-Experts with KDA + Gated MLA attention, 896 experts and native vision encoder

Full datasheets, every price and sourceKimi K3 ↗

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

Kimi K3 52.7/100Rank 17/51

Survived 0 of 3
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

Points per level

LevelGPT-6.1 Terra LowKimi K3
Level 1Second Thoughts
4 ptsOut of lives
17 ptsOut of lives
Level 2Pressure Pot
8 ptsOut of lives
10 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
11 ptsOut of lives

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

Kimi K3 57.7/100Rank 24/52

Cleared 3 of 5
Latch: complete playing field
Level 514.2 ptsTurn 4 / 40

Points per level

LevelGPT-6.1 Terra LowKimi K3
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.2 ptsCleared
9.6 ptsCleared
Level 3Relay vault
18.8 ptsCleared
18.2 ptsClearedFinished early · 3 beacons left
Level 4Passing bay
10.2 ptsFinished early
14.2 ptsFinished early
Level 5Second thoughts
20.6 ptsCleared
14.2 ptsFinished early

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.

Kimi K3

The room fills the complete portrait frame without visible borders or labels. The main sphere and airborne black are convincingly placed within the portrait frame. Paint ordering is supported, but its contact and transport history remains weakly expressed. Symmetric wall ghosts, inverted floor imagery and panel echoes establish a basic mirror system. Diffuse gradients dominate, with little ordered nested imagery or repeated emitter mapping on either planar or spherical surfaces. The wall images sit too low, and the floor image is unusually large and low.

Score breakdown

CategoryGPT-6.1 Terra LowKimi K3
State at 600 ms22.0/2518.0/25
Camera and placement4.0/158.0/15
Reflections10.0/12024.0/120
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.

Kimi K3

The indigo creature and warm reflected counterpart create a balanced, contemplative composition. Equations, constellations and book emblems give the transformation meaning. Clean silhouettes and controlled glow support the scene, but minimally articulated legs, shallow spatial cues and smooth, generalized surfaces limit its anatomical and material richness.

Score breakdown

CategoryGPT-6.1 Terra LowKimi K3
Task & likeness4.0/109.0/10
Anatomy & construction3.5/107.0/10
Space & placement4.5/108.0/10
Light & reflections5.5/107.5/10
Purposeful detail5.5/108.0/10
Artistry & character5.0/108.5/10
Materials & effects5.5/107.5/10
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.

Kimi K3

An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.

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.

Kimi K3

The centered portrait, dark veil, folded hands and misty landscape clearly evoke Mona Lisa. Replication is limited by the elongated neck, simplified facial proportions and oval hands with shallow finger marks. Soft shading gives some volume, but pervasive blur substitutes for controlled painterly transitions and precise detail.

Score breakdown

CategoryGPT-6.1 Terra LowKimi K3
Task & likeness5.0/104.5/10
Anatomy & construction4.5/103.5/10
Space & placement5.0/104.5/10
Light & reflections6.0/104.5/10
Purposeful detail5.0/104.0/10
Artistry & character5.5/104.5/10
Materials & effects5.0/104.5/10
Visual integrity6.0/105.0/10

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.

Kimi K3

A coordinated sunset palette, expressive silhouettes and varied small details create a lively, appealing beach illustration. The central sun and framing palm and umbrella organize the busy scene, with clean contours preserving readability. Bodies and people remain diagrammatic, depth is shallow, and inverted figure reflections cross matte-looking sand without convincing surface lighting. Materials and movement are mostly conveyed through flat shapes.

Score breakdown

CategoryGPT-6.1 Terra LowKimi K3
Task & likeness8.0/108.5/10
Anatomy & construction5.5/107.0/10
Space & placement5.5/107.0/10
Light & reflections6.5/106.5/10
Purposeful detail6.0/108.5/10
Artistry & character5.0/108.5/10
Materials & effects5.5/106.5/10
Visual integrity7.5/107.0/10

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.

Kimi K3

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.

Kimi K3

The raccoon rides on the dog's back, and the dog's paw meets a steering assembly connected to the red hull. Expressive faces, a warm sunset and sweeping spray create an appealing composition. Crowded body overlaps obscure some limb connections, and the raccoon's right ear appears slightly separated. Flat shading and stylized reflections limit volume and depth.

Score breakdown

CategoryGPT-6.1 Terra LowKimi K3
Task & likeness6.5/108.0/10
Anatomy & construction5.0/106.5/10
Space & placement5.5/107.5/10
Light & reflections4.5/107.0/10
Purposeful detail6.0/107.5/10
Artistry & character5.0/106.0/10
Materials & effects5.0/107.5/10
Visual integrity6.0/107.0/10

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

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.

Kimi K3

The pelican and bicycle are immediately recognizable, with an expressive bill, flowing scarf and cheerful composition. Both legs remain attached, but pedal connections and wing contact with the handlebar are weakly resolved. Wheel alignment and landscape layers are coherent. Clean outlines support the illustration, while flat surfaces and limited lighting keep it short of masterful execution.

Score breakdown

CategoryGPT-6.1 Terra LowKimi K3
Task & likeness7.0/108.0/10
Anatomy & construction5.5/106.5/10
Space & placement6.0/107.5/10
Light & reflections5.5/105.0/10
Purposeful detail6.5/106.5/10
Artistry & character6.0/106.0/10
Materials & effects6.0/106.0/10
Visual integrity6.0/106.5/10

Benchmark task

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