STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Gemini 4 Argon vs GPT-5.6 Sol

Gemini 4 Argon leads GPT-5.6 Sol by 13.3 points on StealthMark, 67.4 to 54.1. It leads on 7 of 9 benchmarks and GPT-5.6 Sol on 2, including both games. Gemini 4 Argon scores higher on Newton's Mirror, with its largest category advantage in reflections.

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All results ↗
All results ↗

Overall StealthMark

67.4/100Overall rank 5/53
54.1/100Overall rank 12/53

General Intelligence

63.6/100
51.9/100

Visual Intelligence

74.4/100
58.2/100

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

BENCHMARK BY BENCHMARK

Where each model leads

  • Gemini 4 Argon
  • GPT-5.6 Sol
  • Other models
  • Median

DATASHEET

Specs and pricing

Gemini 4 Argon scores higher on StealthMark, is 2× cheaper per output token and runs 1.8× faster in our speed test. Both take about 1M tokens of context.

  • Gemini 4 Argon
  • GPT-5.6 Sol
  • Other models
  • Median
PricePer 1M output tokens, input below
Gemini 4 Argon: $102× cheaper$2 inputGPT-5.6 Sol: $20$4 input
Context windowTokens per request, max output below
Gemini 4 Argon: 1MTied1M max outputGPT-5.6 Sol: 1.05MTied128K max output
Output speedTokens per second, our measurement
Gemini 4 Argon: 1441.8× fastertokens/sGPT-5.6 Sol: 81tokens/s
Developer
GoogleOpenAI
Released
13 Oct 20269 Jul 2026
Origin
United StatesBoth
Input → output
Text, image, audio, video, PDF → textText, image → text
Architecture
Sparse mixture-of-experts (MoE) transformer with native multimodal inputsNot published

Full datasheets, every price and sourceGemini 4 Argon ↗GPT-5.6 Sol ↗

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.

Gemini 4 Argon 48.6/100Rank 19/47

Survived 1 of 3
Foresight: complete playing field
Level 36 ptsTurn 7 / 20

GPT-5.6 Sol 62.9/100Rank 8/47

Survived 1 of 3
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

Points per level

LevelGemini 4 ArgonGPT-5.6 Sol
Level 1Second Thoughts
26 ptsSurvived
27 ptsSurvived
Level 2Pressure Pot
9 ptsOut of lives
10 ptsOut of lives
Level 3Hide or Flight
6 ptsOut of lives
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.

Gemini 4 Argon 82.6/100Rank 6/48

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

GPT-5.6 Sol 83.6/100Rank 5/48

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

Points per level

LevelGemini 4 ArgonGPT-5.6 Sol
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
10.2 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
19.2 ptsCleared
18.8 ptsCleared
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
18.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.6 ptsCleared
20.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Gemini 4 Argon

The central sphere, separate airborne black blob, flattened cyan contact and displaced crimson aftermath support the principal camera and physical-state requirements. Open lateral lanes and initial reflection placements provide partial optical structure, but missing outer chains, sparse nested imagery and incomplete emitter mappings remain substantial limitations. The raised crimson mass also weakens paint-scale fidelity.

GPT-5.6 Sol

The central sphere and paint ordering are supported, but a frontal, centrally converging chamber replaces the required corner perspective. The first wall and floor images have incorrect placement and scale relationships. Sparse reflection cues remain, while continuous outer chains, open lateral sightlines, dense planar light sequences and curved nested spherical imagery are largely missing.

Score breakdown

CategoryGemini 4 ArgonGPT-5.6 Sol
State at 600 ms24.5/2523.0/25
Camera and placement14.5/156.0/15
Reflections50.5/12011.0/120
Materials and scale8.5/107.5/10
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

Gemini 4 Argon

An appealing, controlled illustration with a distinctive buoyant silhouette, expressive comic face and rich luminous colour. The full composition and grounded slipper read clearly. The principal limitation is the crowded raised-foot interaction: paws, toes and lining overlap without making the bent leg or tight fit unmistakable.

GPT-5.6 Sol

Six evenly spaced lobes, outward-facing heads and a clear central hexagon establish the requested knot. The ivory silhouette is controlled, but broad crossing bands resemble rigid strips, shading provides limited muscular volume, and repetitive scale lines extend across black loop openings. Small oval heads have readable eyes and mouths but limited anatomical character or moist surface detail.

Score breakdown

CategoryGemini 4 ArgonGPT-5.6 Sol
Task & likeness7.0/107.5/10
Anatomy & construction6.5/106.0/10
Space & placement7.5/107.0/10
Light & reflections7.5/105.0/10
Purposeful detail8.0/106.0/10
Artistry & character7.0/106.5/10
Materials & effects7.0/104.5/10
Visual integrity7.5/106.0/10

Benchmark task

Gemini 4 Argon

A luminous little dragon struggles with its bedtime slippers while a buoyant tail pulls it upward. The scene tests expressive anatomy, physical contact and the contrast between translucent forms and heavy objects.

GPT-5.6 Sol

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

Gemini 4 Argon

A coherent, moderately complex Mona Lisa reconstruction with substantial portrait volume, articulated clothing and landscape recession. Specific source features support replication beyond recognition alone. Altered facial likeness, uncertain crossed-hand anatomy and pervasive colored crackle keep the result uneven despite its developed shading and detail.

GPT-5.6 Sol

The crossed hands, dark dress and winding landscape establish the Mona Lisa composition. Replication is limited by enlarged eyes, an elongated face and a more frontal pose. Broad gradients suggest volume, but outlined features and flattened, overlapping fingers weaken the portrait. The frame and restrained palette unify the image; visible grain adds texture without convincing painterly transitions.

Score breakdown

CategoryGemini 4 ArgonGPT-5.6 Sol
Task & likeness6.5/104.5/10
Anatomy & construction6.5/104.0/10
Space & placement6.5/105.5/10
Light & reflections7.0/105.0/10
Purposeful detail6.0/105.0/10
Artistry & character6.5/104.5/10
Materials & effects7.0/105.5/10
Visual integrity7.0/106.5/10

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

Gemini 4 Argon

A strong decorative beach illustration with controlled color, intricate silhouettes and abundant playful detail. Connected dolphin forms and recognizable equipment support its construction, while the aligned sunset reflection anchors the scene. Compressed wave depth, ambiguous foreground support and uneven reflection specificity limit physical coherence. The saved comparisons support retaining the category assessments.

GPT-5.6 Sol

The purple-to-gold sunset, framing palms and varied beach activities create an appealing, coherent illustration. The sun’s reflection establishes a clear focal path. Figures and animals are recognizable but geometrically simplified; airborne dolphins lack convincing splashes, and the boat reflection is schematic. Clean silhouettes and playful details succeed more strongly than anatomical depth or material realism.

Score breakdown

CategoryGemini 4 ArgonGPT-5.6 Sol
Task & likeness9.0/108.5/10
Anatomy & construction7.5/106.0/10
Space & placement8.5/107.0/10
Light & reflections8.5/106.5/10
Purposeful detail9.0/107.0/10
Artistry & character8.0/106.5/10
Materials & effects8.0/106.5/10
Visual integrity8.0/107.0/10

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

Gemini 4 Argon

This benchmark has not been assessed yet.

GPT-5.6 Sol

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

Gemini 4 Argon

An accomplished illustration with expressive characters, intricate spray and strong depth. Direct back seating, steering connections and hull-water contact are only partly demonstrated. Clean graphic execution and purposeful detail remain strengths, while shadows and reflections provide limited physical grounding.

GPT-5.6 Sol

Expressive faces, bold silhouettes and layered waves make an appealing cartoon. The raccoon sits convincingly behind the dog's shoulders, and the dog's forward paw reaches the steering grip. Steering construction and seated support remain somewhat ambiguous. The glowing sunset lacks a corresponding warm reflection or consistent illumination on the riders.

Score breakdown

CategoryGemini 4 ArgonGPT-5.6 Sol
Task & likeness8.5/106.5/10
Anatomy & construction8.0/105.0/10
Space & placement7.5/106.5/10
Light & reflections7.5/106.5/10
Purposeful detail8.5/107.5/10
Artistry & character8.5/105.0/10
Materials & effects8.0/107.0/10
Visual integrity8.0/105.0/10

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

Gemini 4 Argon

An expressive, detailed illustration with controlled gradients and coherent environmental depth. Continuous body contours and connected bicycle components establish competent construction. Steering grip and pedal engagement remain less explicit than the decorative details and wheel placement. These contact uncertainties limit action and placement credit without establishing broken anatomy.

GPT-5.6 Sol

The expressive pelican and balanced coastal composition remain appealing, but a sky-colored slit between the neck contours above the wing leaves the central anatomy incoherent. This visible construction and layering defect prevents a clean-integrity assessment. Clustered feet lack clear pedal contacts and the chain routing is schematic; lighting and water reflections remain graphic.

Score breakdown

CategoryGemini 4 ArgonGPT-5.6 Sol
Task & likeness9.0/108.5/10
Anatomy & construction8.5/105.0/10
Space & placement8.0/107.5/10
Light & reflections8.0/107.5/10
Purposeful detail8.5/108.0/10
Artistry & character8.5/106.5/10
Materials & effects8.5/107.0/10
Visual integrity8.5/104.5/10

Benchmark task

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