STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Gemini 4 Argon vs GPT-5.5

Gemini 4 Argon leads GPT-5.5 by 36.1 points on StealthMark, 67.4 to 31.3. It leads on all 7 benchmarks with results for both. Gemini 4 Argon scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

67.4/100Overall rank 5/53
31.3/100Overall rank 43/53

General Intelligence

63.6/100
26.8/100

Visual Intelligence

74.4/100
36.3/100

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

  • GPT-5.5Multi-step reasoning not measured

BENCHMARK BY BENCHMARK

Where each model leads

  • Gemini 4 Argon
  • GPT-5.5
  • Other models
  • Median

DATASHEET

Specs and pricing

Gemini 4 Argon scores higher on StealthMark and is 3× cheaper per output token. GPT-5.5 runs 34% faster in our speed test. Both take about 1M tokens of context.

  • Gemini 4 Argon
  • GPT-5.5
  • Other models
  • Median
PricePer 1M output tokens, input below
Gemini 4 Argon: $103× cheaper$2 inputGPT-5.5: $30$5 input
Context windowTokens per request, max output below
Gemini 4 Argon: 1MTied1M max outputGPT-5.5: 1.05MTied128K max output
Output speedTokens per second, our measurement
Gemini 4 Argon: 144tokens/sGPT-5.5: 19334% fastertokens/s
Developer
GoogleOpenAI
Released
13 Oct 202623 Apr 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-5.5 ↗

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

Points per level

LevelGemini 4 ArgonGPT-5.5
Level 1Second Thoughts
26 ptsSurvived
No run
Level 2Pressure Pot
9 ptsOut of lives
No run
Level 3Hide or Flight
6 ptsOut of lives
No run

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

Points per level

LevelGemini 4 ArgonGPT-5.5
Level 1Hold the door
5.2 ptsCleared
No run
Level 2Crossfeed
9.8 ptsCleared
No run
Level 3Relay vault
19.2 ptsCleared
No run
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
No run
Level 5Second thoughts
20.6 ptsCleared
No run

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-5.5

The paint ordering and separate black bead support part of the physical state, but adhesion and rotational transport remain only partly established. The sweeping cyan arc and long crimson lobes do not clearly communicate the limited time since their respective impacts. The main sphere is too large and too low, and the black bead is below its required projected position. Displaced isolated sphere images, a flattened floor echo and missing recursive, nested and emitter reflections provide little coherent optical structure. The colored paint is excessively bulky for the specified quantities.

Score breakdown

CategoryGemini 4 ArgonGPT-5.5
State at 600 ms24.5/2515.0/25
Camera and placement14.5/156.0/15
Reflections50.5/1205.0/120
Materials and scale8.5/106.0/10
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

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-5.5

Six pale, scaled lobes form a balanced radial arrangement, but they remain separate capsules rather than an interlocking serpent knot. There are no crossings, alternating overlaps, or crisp inner bends; the central hexagon is an isolated outline. Small outward-facing heads sit within the lobes without integrated necks. Soft shading and tidy contours provide some finish, while repetitive oval scales and cartoon faces limit organic credibility.

Score breakdown

CategoryGemini 4 ArgonGPT-5.5
Task & likeness7.0/103.0/10
Anatomy & construction6.5/103.0/10
Space & placement7.5/105.0/10
Light & reflections7.5/105.0/10
Purposeful detail8.0/104.5/10
Artistry & character7.0/104.0/10
Materials & effects7.0/104.5/10
Visual integrity7.5/107.0/10

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-5.5

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-5.5

The veil, restrained smile, crossed hands and muted landscape establish Mona Lisa references. The oversized frontal face and schematic features weaken likeness and expression, while fingerless tapered hand shapes leave anatomy unresolved. Clean contours and balanced framing provide coherence, but sparse garment detail, broad landscape bands and shallow shading limit the portrait's sophistication.

Score breakdown

CategoryGemini 4 ArgonGPT-5.5
Task & likeness6.5/101.5/10
Anatomy & construction6.5/101.5/10
Space & placement6.5/101.5/10
Light & reflections7.0/102.0/10
Purposeful detail6.0/102.5/10
Artistry & character6.5/101.5/10
Materials & effects7.0/102.0/10
Visual integrity7.0/101.5/10

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-5.5

The sunset, palms, birds, playful animals and ball clearly establish the requested beach scene. Warm sky gradients and clean silhouettes make it appealing. Animal construction is underdeveloped: torso and limb connections are unclear, especially in the round-eared foreground figure. The dolphin lacks a convincing splash, and broad reflection bands suggest sunset light without resolving its behavior on water.

Score breakdown

CategoryGemini 4 ArgonGPT-5.5
Task & likeness9.0/107.0/10
Anatomy & construction7.5/102.5/10
Space & placement8.5/103.0/10
Light & reflections8.5/103.0/10
Purposeful detail9.0/103.0/10
Artistry & character8.0/103.0/10
Materials & effects8.0/103.0/10
Visual integrity8.0/103.5/10

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

Gemini 4 Argon

This benchmark has not been assessed yet.

GPT-5.5

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-5.5

The raccoon's masked face, bright hull and sweeping wake make the scene readable and lively. The dog is much less resolved: its head is ambiguous, overlapping brown forms obscure its anatomy, and its paws do not visibly grip the controls. Smooth shapes and cheerful colors provide appeal, but weak steering construction and limited depth keep the drawing uneven.

Score breakdown

CategoryGemini 4 ArgonGPT-5.5
Task & likeness8.5/103.5/10
Anatomy & construction8.0/103.0/10
Space & placement7.5/104.5/10
Light & reflections7.5/105.0/10
Purposeful detail8.5/103.5/10
Artistry & character8.5/103.0/10
Materials & effects8.0/105.0/10
Visual integrity8.0/103.0/10

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-5.5

The oversized bill, bright bicycle and sunset create an appealing, recognizable cartoon. Riding mechanics are less convincing: the wing has no clear steering contact, leg attachments are uneven, and feet do not visibly engage pedals. A dark notch complicates the rear neck junction. Clean contours and orderly spokes provide polish, while simplified anatomy and lighting limit depth.

Score breakdown

CategoryGemini 4 ArgonGPT-5.5
Task & likeness9.0/107.5/10
Anatomy & construction8.5/104.5/10
Space & placement8.0/106.5/10
Light & reflections8.0/106.5/10
Purposeful detail8.5/105.5/10
Artistry & character8.5/105.0/10
Materials & effects8.5/106.0/10
Visual integrity8.5/107.5/10

Benchmark task

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