STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GPT-6 Astra vs Iceman Contributor

GPT-6 Astra leads Iceman Contributor by 55.4 points on StealthMark, 74.6 to 19.2. It leads on all 9 benchmarks. GPT-6 Astra scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
Model guide ↗

Overall StealthMark

74.6/100Overall rank 1/55
19.2/100Overall rank 50/55

General Intelligence

73.4/100
11.7/100

Visual Intelligence

76.9/100
31.0/100

Reasoning efficiency

How many reasoning tokens a model needs for the quality it delivers.

Single-step reasoning How much it reasons to understand a task

Multi-step reasoning How much it keeps reasoning as a task goes on

  • GPT-6 Astra

Cost efficiency

How much Performance you get for your money.

  • Iceman ContributorNot measured

Open or local

BENCHMARK BY BENCHMARK

Where each model leads

  • GPT-6 Astra
  • Iceman Contributor
  • Other models
  • Median

DATASHEET

Specs and pricing

GPT-6 Astra scores higher on StealthMark and runs 41% faster in our speed test.

  • GPT-6 Astra
  • Iceman Contributor
  • Other models
  • Median
PricePer 1M output tokens, input below
GPT-6 Astra: $50$10 inputIceman Contributor: No list price
Context windowTokens per request, max output below
GPT-6 Astra: 1.05M128K max outputIceman Contributor: Not published
Output speedTokens per second, our measurement
GPT-6 Astra: 6541% fastertokens/sIceman Contributor: 46tokens/s
Developer
OpenAINot published
Released
3 Sep 2026Not published
Origin
United StatesNot published
Input → output
Text, image → textNot published

Full datasheets, every price and sourceGPT-6 Astra ↗

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 Astra 76.1/100Rank 2/51

Survived 3 of 3
Foresight: complete playing field
Level 318 ptsTurn 20 / 20

Iceman Contributor 3.2/100Rank 51/51

Survived 0 of 3
Foresight: complete playing field
Level 31 ptsTurn 7 / 20

Points per level

LevelGPT-6 AstraIceman Contributor
Level 1Second Thoughts
27 ptsSurvived
0 ptsOut of lives
Level 2Pressure Pot
11 ptsSurvived
3 ptsOut of lives
Level 3Hide or Flight
18 ptsSurvived
1 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 Astra 87.6/100Rank 1/52

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

Iceman Contributor 3.6/100Rank 48/52

Cleared 1 of 5
Latch: complete playing field
Level 55 ptsTurn 25 / 40

Points per level

LevelGPT-6 AstraIceman Contributor
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
10.2 ptsClearedFinished early · 1 beacon left
2.8 ptsFinished early
Level 3Relay vault
19.2 ptsCleared
2.2 ptsFinished early
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
4 ptsFinished early
Level 5Second thoughts
20.6 ptsCleared
5 ptsFinished early

Newton's Mirror

Same task instructions

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

The judgment

GPT-6 Astra

Major placement and the visible contact sequence are convincing. Dense planar light repetition, recognizable spherical panel images and simplified nested sphere motifs provide useful optical structure. Missing outer chains, truncated distant sequences and incorrect bead-like belts still leave the recursive reflections substantially incomplete.

Iceman Contributor

The image provides limited evidence through rounded volume, faint wall strips and floor echoes. Its main sphere is small and low, the paint beads do not establish the required interaction history, and most of the defining mirror structure is missing.

Score breakdown

CategoryGPT-6 AstraIceman Contributor
State at 600 ms25.0/250.5/25
Camera and placement15.0/152.5/15
Reflections70.0/1207.5/120
Materials and scale10.0/103.0/10
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

GPT-6 Astra

The sixfold silhouette, pale coloring, outward heads and central hexagon closely match the brief. Fine scales and soft shading support rounded volume. However, several crossings have conspicuous rectangular seams and weak contact shadows, making the weave feel assembled. Small heads have limited anatomical definition, and the repetitive texture conveys less organic life than requested.

Iceman Contributor

The crystal crown, cyan eyes and blue faceting communicate an icy fantasy character. Anatomical readability is substantially weaker: the ringed torso, crowded facial construction and fingerless appendages do not resolve the requested childlike crouch or pouncing gesture. Sparse surface detail and shallow shading further limit the result.

Score breakdown

CategoryGPT-6 AstraIceman Contributor
Task & likeness9.0/104.0/10
Anatomy & construction8.0/103.0/10
Space & placement7.5/104.0/10
Light & reflections7.0/104.5/10
Purposeful detail8.0/104.0/10
Artistry & character8.5/104.5/10
Materials & effects8.0/104.5/10
Visual integrity8.5/104.0/10

Benchmark task

GPT-6 Astra

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.

Iceman Contributor

Character scenes test expression, anatomy, materials and coherent visual construction.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

GPT-6 Astra

Controlled hair contours, neckline detail, modeled sleeves and a layered river landscape give this recognizable portrait developed illustrative finish. The elongated face, largely frontal torso, crowded fingers and weakly established chair support limit replication, anatomical precision and spatial conviction. Small construction slips at the neck and jaw, a stray dark shape under the right cuff and an abruptly ending armrest bar weaken integrity.

Iceman Contributor

The portrait retains a dark silhouette against an earthy landscape, but replication is weak. The frontal body, elongated facial proportions and undifferentiated hands lose the reference's defining pose and likeness. Basic gradients and layered hills provide some coherence, with little anatomical or painterly detail.

Score breakdown

CategoryGPT-6 AstraIceman Contributor
Task & likeness6.5/101.5/10
Anatomy & construction6.5/101.5/10
Space & placement6.5/102.5/10
Light & reflections6.5/102.0/10
Purposeful detail6.5/102.0/10
Artistry & character7.0/102.0/10
Materials & effects7.0/102.0/10
Visual integrity7.5/103.0/10

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

Beach

Different task instructions

Creativity, perspective and visual beauty.

The judgment

GPT-6 Astra

A richly composed sunset beach illustration with cohesive peach, mauve and teal colors. Sweeping palm fronds, a scalloped umbrella and curved shorelines frame the sun and its aligned reflection. Distinct animal silhouettes and carefully distributed beach details reward inspection. Simplified human and dog anatomy, slight dolphin splash cues and inconsistent equipment shadows limit physical conviction.

Iceman Contributor

A coherent sunset beach with recognizable animals, playful details and effective palm framing. Connected silhouettes and layered scenery support modest construction and placement credit. Jointless figures, limited foreshortening and an inadequately separated sun and reflection keep the execution basic despite its attractive color.

Score breakdown

CategoryGPT-6 AstraIceman Contributor
Task & likeness9.0/107.0/10
Anatomy & construction7.5/103.5/10
Space & placement8.5/106.0/10
Light & reflections7.5/104.0/10
Purposeful detail8.5/105.5/10
Artistry & character8.5/103.5/10
Materials & effects7.5/104.5/10
Visual integrity7.5/105.0/10

Benchmark task

A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.

Ground Truth

Different task instructions

Physical reasoning, light and visual reconstruction.

The judgment

GPT-6 Astra

This benchmark has not been assessed yet.

Iceman Contributor

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

Different task instructions

Scene composition and interacting subjects.

The judgment

GPT-6 Astra

A controlled, expressive illustration with readable riding and steering, articulated poses and purposeful small details. Layered foam and coherent hull perspective establish motion and depth. Simplified paws, compressed control fittings and limited directional lighting constrain its physical sophistication.

Iceman Contributor

The sunset palette and red hull establish an appealing setting, but the central interaction remains unresolved. Overlapping bodies obscure the dog, supported seating is unclear, and no readable paw-to-control grip demonstrates steering. Simple construction, weak environmental lighting and loosely described spray limit depth and finish.

Score breakdown

CategoryGPT-6 AstraIceman Contributor
Task & likeness8.5/102.0/10
Anatomy & construction7.5/103.0/10
Space & placement7.5/103.0/10
Light & reflections6.5/104.0/10
Purposeful detail8.0/103.5/10
Artistry & character7.5/102.5/10
Materials & effects7.5/104.0/10
Visual integrity8.0/102.5/10

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

Different task instructions

Subject construction and spatial relationships.

The judgment

GPT-6 Astra

The pelican's long bill, flowing scarf and warm coastal palette create a charming, balanced illustration. Wheels, spokes and frame are largely coherent, but neither wing reaches the handlebars, and the rear leg's pedal contact is unclear. Flat lighting and simplified surfaces limit depth despite clean outlines and attractive feather detail.

Iceman Contributor

A recognizable pelican and bicycle sit within an appealing sunset composition. Feather contours, bill shape and atmospheric colour provide character, but disconnected-looking leg origins, unclear pedal contact and unresolved steering weaken the central riding action. Consistent wheel alignment establishes a side view without resolving the rider's support.

Score breakdown

CategoryGPT-6 AstraIceman Contributor
Task & likeness8.0/104.0/10
Anatomy & construction7.0/103.5/10
Space & placement7.5/103.5/10
Light & reflections7.0/105.0/10
Purposeful detail8.0/104.5/10
Artistry & character8.0/103.5/10
Materials & effects7.5/104.0/10
Visual integrity8.0/103.0/10

Benchmark task

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