STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Gemma 4 26B A4B vs GPT-6.1 Terra Low

GPT-6.1 Terra Low leads Gemma 4 26B A4B by 24.8 points on StealthMark, 41.3 to 16.5. It leads on 8 of 9 benchmarks, including both games, and Gemma 4 26B A4B on 1. GPT-6.1 Terra Low scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

16.5/100Overall rank 52/55
41.3/100Overall rank 35/55

General Intelligence

9.4/100
34.3/100

Visual Intelligence

28.9/100
53.1/100

Open or local

Local modelOpen model · Apache 2.0

BENCHMARK BY BENCHMARK

Where each model leads

  • Gemma 4 26B A4B
  • GPT-6.1 Terra Low
  • Other models
  • Median

DATASHEET

Specs and pricing

  • Gemma 4 26B A4B
  • GPT-6.1 Terra Low
  • Other models
  • Median
PricePer 1M output tokens, input below
Gemma 4 26B A4B: $0.30$0.09 inputGPT-6.1 Terra Low: No list price
Context windowTokens per request, max output below
Gemma 4 26B A4B: 256KGPT-6.1 Terra Low: Not published
Output speedTokens per second, our measurement
Gemma 4 26B A4B: 95tokens/sGPT-6.1 Terra Low: Not measured
SizeTotal and active parameters
Gemma 4 26B A4B: 25.2B3.8B activeGPT-6.1 Terra Low: Not disclosed
Developer
Google DeepMindNot published
Released
2 Apr 2026Not published
Origin
United StatesNot published
Input → output
Text, image → textNot published
Architecture
Mixture-of-Experts multimodal transformer with interleaved sliding-window and global attentionNot published

Full datasheets, every price and sourceGemma 4 26B A4B ↗

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.

Gemma 4 26B A4B 4.1/100Rank 50/51

Survived 0 of 3
Foresight: complete playing field
Level 32 ptsTurn 9 / 20

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

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

Points per level

LevelGemma 4 26B A4BGPT-6.1 Terra Low
Level 1Second Thoughts
3 ptsOut of lives
4 ptsOut of lives
Level 2Pressure Pot
2 ptsOut of lives
8 ptsOut of lives
Level 3Hide or Flight
2 ptsOut of lives
9 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.

Gemma 4 26B A4B 4.5/100Rank 45/52

Cleared 2 of 5
Latch: complete playing field
Level 53 ptsTurn 40 / 40

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

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

Points per level

LevelGemma 4 26B A4BGPT-6.1 Terra Low
Level 1Hold the door
3 ptsCleared1 beacon left
5.2 ptsCleared
Level 2Crossfeed
6.2 ptsFinished early
9.2 ptsCleared
Level 3Relay vault
15.2 ptsClearedFinished early · 3 beacons left
18.8 ptsCleared
Level 4Passing bay
11.8 ptsFinished early
10.2 ptsFinished early
Level 5Second thoughts
3 ptsOut of turns
20.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Gemma 4 26B A4B

Separate airborne black and contact-compatible paint flattening earn partial state credit. Settlement, adhesion and differentiated paint transport remain unresolved. The enlarged, low sphere and thin lamp strip substantially depart from the required camera, while the defining mirror structure is missing. Weak material appearance and oversized black paint limit material credit. The retained base total is 18/170; the floor-damage reward is 0, giving 18/180.

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.

Score breakdown

CategoryGemma 4 26B A4BGPT-6.1 Terra Low
State at 600 ms10.0/2522.0/25
Camera and placement2.0/154.0/15
Reflections0.0/12010.0/120
Materials and scale2.5/106.0/10
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

Gemma 4 26B A4B

An appealing, readable sparkle-creature with luminous colour and expressive eyes. Simple geometric construction limits sophistication, while sharp body points, ambiguous hand contact and a minimally resolved jar weaken the requested soft, plump character and treasure-presenting pose.

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.

Score breakdown

CategoryGemma 4 26B A4BGPT-6.1 Terra Low
Task & likeness5.5/104.0/10
Anatomy & construction4.5/103.5/10
Space & placement6.0/104.5/10
Light & reflections6.0/105.5/10
Purposeful detail5.5/105.5/10
Artistry & character4.0/105.0/10
Materials & effects6.0/105.5/10
Visual integrity7.0/104.0/10

Benchmark task

Gemma 4 26B A4B

A small luminous creature proudly holding an empty glass jar tests expression, transparent materials and the balance of character and prop.

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.

Mona Lisa

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

Gemma 4 26B A4B

The centered dark-haired portrait provides a loose reference cue, but its elongated, nearly featureless face and undifferentiated torso fall far short of replication. Crossed hands, the subtle smile, clothing structure and landscape are unresolved. Clean silhouettes and soft gradients provide limited coherence.

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.

Score breakdown

CategoryGemma 4 26B A4BGPT-6.1 Terra Low
Task & likeness0.5/105.0/10
Anatomy & construction2.0/104.5/10
Space & placement1.0/105.0/10
Light & reflections2.0/106.0/10
Purposeful detail1.0/105.0/10
Artistry & character2.0/105.5/10
Materials & effects1.0/105.0/10
Visual integrity4.5/106.0/10

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

Gemma 4 26B A4B

A clean, balanced sunset scene demonstrates the beach, birds and a centered reflection. Animals and play receive only minimal treatment. Coherent layers and controlled gradients support readability, but unresolved aquatic anatomy, sparse details and weak surface modeling keep the drawing basic.

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.

Score breakdown

CategoryGemma 4 26B A4BGPT-6.1 Terra Low
Task & likeness3.5/108.0/10
Anatomy & construction2.0/105.5/10
Space & placement3.5/105.5/10
Light & reflections5.0/106.5/10
Purposeful detail1.0/106.0/10
Artistry & character1.5/105.0/10
Materials & effects2.0/105.5/10
Visual integrity6.0/107.5/10

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

Gemma 4 26B A4B

This benchmark has not been assessed yet.

GPT-6.1 Terra Low

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

Gemma 4 26B A4B

The animal stack is recognizable, and clean silhouettes support a basic illustration. Steering is not depicted, while the craft's construction and water contact remain unresolved. Sparse anatomical and material detail limit the finish. The sky gradient and glow provide atmospheric lighting, but the subjects lack corresponding modeling.

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.

Score breakdown

CategoryGemma 4 26B A4BGPT-6.1 Terra Low
Task & likeness2.5/106.5/10
Anatomy & construction2.5/105.0/10
Space & placement4.0/105.5/10
Light & reflections3.5/104.5/10
Purposeful detail2.5/106.0/10
Artistry & character3.0/105.0/10
Materials & effects2.0/105.0/10
Visual integrity7.0/106.0/10

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

Gemma 4 26B A4B

A clean, balanced icon suggests a pelican riding a bicycle. Continuous contours and restrained colors support its finish, but the abbreviated bill, undifferentiated body, unresolved riding contacts and incomplete bicycle mechanism limit likeness and construction. Sparse detail and flat lighting keep the drawing basic despite its clarity.

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.

Score breakdown

CategoryGemma 4 26B A4BGPT-6.1 Terra Low
Task & likeness3.0/107.0/10
Anatomy & construction3.0/105.5/10
Space & placement5.0/106.0/10
Light & reflections3.0/105.5/10
Purposeful detail3.0/106.5/10
Artistry & character2.5/106.0/10
Materials & effects2.5/106.0/10
Visual integrity5.0/106.0/10

Benchmark task

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