STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Claude Haiku 5.5 vs Gemini 4 Argon

Gemini 4 Argon leads Claude Haiku 5.5 by 17.9 points on StealthMark, 67.4 to 49.5. It leads on all 9 benchmarks. 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

49.5/100Overall rank 17/53
67.4/100Overall rank 5/53

General Intelligence

47.6/100
63.6/100

Visual Intelligence

52.8/100
74.4/100

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

  • Claude Haiku 5.5

BENCHMARK BY BENCHMARK

Where each model leads

  • Claude Haiku 5.5
  • Gemini 4 Argon
  • Other models
  • Median

DATASHEET

Specs and pricing

Claude Haiku 5.5 is 20× cheaper per output token and runs 2.8× faster in our speed test. Gemini 4 Argon scores higher on StealthMark. Both take about 1M tokens of context.

  • Claude Haiku 5.5
  • Gemini 4 Argon
  • Other models
  • Median
PricePer 1M output tokens, input below
Claude Haiku 5.5: $0.5020× cheaper$0.10 inputGemini 4 Argon: $10$2 input
Context windowTokens per request, max output below
Claude Haiku 5.5: 1MTied128K max outputGemini 4 Argon: 1MTied1M max output
Output speedTokens per second, our measurement
Claude Haiku 5.5: 4022.8× fastertokens/sGemini 4 Argon: 144tokens/s
Developer
AnthropicGoogle
Released
7 Oct 202613 Oct 2026
Origin
United StatesBoth
Input → output
Text, image → textText, image, audio, video, PDF → text
Architecture
Not publishedSparse mixture-of-experts (MoE) transformer with native multimodal inputs

Full datasheets, every price and sourceClaude Haiku 5.5 ↗Gemini 4 Argon ↗

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.

Claude Haiku 5.5 34.4/100Rank 25/47

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

Gemini 4 Argon 48.6/100Rank 19/47

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

Points per level

LevelClaude Haiku 5.5Gemini 4 Argon
Level 1Second Thoughts
4 ptsOut of lives
26 ptsSurvived
Level 2Pressure Pot
7 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
6 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.

Claude Haiku 5.5 78.3/100Rank 10/48

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

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

LevelClaude Haiku 5.5Gemini 4 Argon
Level 1Hold the door
5 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
18.8 ptsCleared
19.2 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

Claude Haiku 5.5

The centered sphere, compact airborne black blob and differentiated cyan/crimson interaction support substantial state and placement credit. The few recognizable sphere and panel images establish limited optical relationships, but most of the required mirror system is missing. Rounded volume and localized paint warrant substantial material credit despite the soft, illustrative finish.

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.

Score breakdown

CategoryClaude Haiku 5.5Gemini 4 Argon
State at 600 ms25.0/2524.5/25
Camera and placement8.0/1514.5/15
Reflections24.5/12050.5/120
Materials and scale7.5/108.5/10
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

Claude Haiku 5.5

A coherent coral squid emblem with a compact mantle, restrained face and clean centered presentation. Its radial silhouette and floating placement work, but sharp arm tips, crowded roots and sparse surface modeling limit softness, construction and finish.

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.

Score breakdown

CategoryClaude Haiku 5.5Gemini 4 Argon
Task & likeness6.5/107.0/10
Anatomy & construction4.0/106.5/10
Space & placement6.5/107.5/10
Light & reflections4.0/107.5/10
Purposeful detail3.5/108.0/10
Artistry & character3.5/107.0/10
Materials & effects4.5/107.0/10
Visual integrity7.0/107.5/10

Benchmark task

Claude Haiku 5.5

A coral squid with spreading arms tests connected anatomy, balanced composition and soft surface shading.

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.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Claude Haiku 5.5

A recognizable but basic Mona Lisa reinterpretation. Clean contours and smooth facial lighting provide coherence and volume. Replication remains limited by the frontal pose, elongated neck, schematic expression, unresolved crossed hands and sparse landscape. Lighting is more successful than anatomical construction and purposeful detail.

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.

Score breakdown

CategoryClaude Haiku 5.5Gemini 4 Argon
Task & likeness3.0/106.5/10
Anatomy & construction4.0/106.5/10
Space & placement4.0/106.5/10
Light & reflections5.5/107.0/10
Purposeful detail2.5/106.0/10
Artistry & character3.5/106.5/10
Materials & effects2.5/107.0/10
Visual integrity5.5/107.0/10

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

Claude Haiku 5.5

A cheerful, coherent beach illustration with attractive sunset colors, readable accessories and clean silhouettes. Its sun and sailboat reflections establish useful physical relationships. Simple animal construction, flattened foreground placement, sparse directional shadows and minimally differentiated surfaces limit its drawing refinement.

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.

Score breakdown

CategoryClaude Haiku 5.5Gemini 4 Argon
Task & likeness8.5/109.0/10
Anatomy & construction6.5/107.5/10
Space & placement7.0/108.5/10
Light & reflections7.0/108.5/10
Purposeful detail7.0/109.0/10
Artistry & character6.0/108.0/10
Materials & effects6.0/108.0/10
Visual integrity8.5/108.0/10

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

Claude Haiku 5.5

This benchmark has not been assessed yet.

Gemini 4 Argon

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

Claude Haiku 5.5

A tidy, appealing cartoon with recognizable animals and a pleasing sunset palette. Steering lacks visible controls, while schematic limbs and uncertain raccoon support weaken the requested interaction. Shallow vehicle construction, flat character lighting and modest displacement limit physical coherence. Clean shapes and readable identifying details remain strengths.

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.

Score breakdown

CategoryClaude Haiku 5.5Gemini 4 Argon
Task & likeness4.0/108.5/10
Anatomy & construction3.5/108.0/10
Space & placement5.5/107.5/10
Light & reflections4.0/107.5/10
Purposeful detail5.5/108.5/10
Artistry & character4.5/108.5/10
Materials & effects5.5/108.0/10
Visual integrity4.5/108.0/10

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

Claude Haiku 5.5

A cheerful, recognizable illustration with clean contours and a balanced warm palette. Aligned wheels and readable frame geometry establish the bicycle, but shoulder construction, feet and steering contact remain imprecise. Sparse drivetrain detail, flat materials and absent grounding shadows limit anatomical and spatial conviction.

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.

Score breakdown

CategoryClaude Haiku 5.5Gemini 4 Argon
Task & likeness8.0/109.0/10
Anatomy & construction5.5/108.5/10
Space & placement6.5/108.0/10
Light & reflections5.0/108.0/10
Purposeful detail6.0/108.5/10
Artistry & character5.0/108.5/10
Materials & effects5.0/108.5/10
Visual integrity8.0/108.5/10

Benchmark task

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