STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GPT-6.1 Terra vs Qwen3.8-Max-0902

Qwen3.8-Max-0902 leads GPT-6.1 Terra by 2.9 points on StealthMark, 63.3 to 60.4. It leads on 7 of 9 benchmarks, including both games, and GPT-6.1 Terra on 2. Qwen3.8-Max-0902 scores higher on Raccoon, with its largest category advantage in anatomy & construction.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

60.4/100Overall rank 9/54
63.3/100Overall rank 6/54

General Intelligence

58.0/100
62.7/100

Visual Intelligence

64.9/100
64.5/100

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

  • GPT-6.1 Terra
  • Qwen3.8-Max-0902
  • Other models
  • Median

DATASHEET

Specs and pricing

Both take about 1.05M tokens of context.

  • GPT-6.1 Terra
  • Qwen3.8-Max-0902
  • Other models
  • Median
PricePer 1M output tokens, input below
GPT-6.1 Terra: $5Tied$1 inputQwen3.8-Max-0902: $4.95Tied$1.65 input
Context windowTokens per request, max output below
GPT-6.1 Terra: 1.05MTied128K max outputQwen3.8-Max-0902: 1MTied128K max output
Output speedTokens per second, our measurement
GPT-6.1 Terra: Not measuredQwen3.8-Max-0902: 76tokens/s
SizeTotal and active parameters
GPT-6.1 Terra: Not disclosedQwen3.8-Max-0902: 2.4T95B activeEstimated
Developer
OpenAIQwen / Alibaba Cloud
Released
26 Oct 20262 Sep 2026
Origin
United StatesChina
Input → output
Text, image → textBoth
Architecture
Not publishedMixture-of-Experts; hosted version based on the open Qwen3.8-2.4T-A95B

Full datasheets, every price and sourceGPT-6.1 Terra ↗Qwen3.8-Max-0902 ↗

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-6.1 Terra 62.0/100Rank 9/50

Survived 2 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Qwen3.8-Max-0902 72.4/100Rank 4/50

Survived 2 of 3
Foresight: complete playing field
Level 316 ptsTurn 20 / 20

Points per level

LevelGPT-6.1 TerraQwen3.8-Max-0902
Level 1Second Thoughts
21 ptsSurvived
27 ptsSurvived
Level 2Pressure Pot
9 ptsOut of lives
12 ptsOut of lives
Level 3Hide or Flight
15 ptsSurvived
16 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.

GPT-6.1 Terra 77.7/100Rank 12/51

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

Qwen3.8-Max-0902 82.6/100Rank 6/51

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

Points per level

LevelGPT-6.1 TerraQwen3.8-Max-0902
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
19.2 ptsCleared
19.2 ptsCleared
Level 4Passing bay
17.8 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

GPT-6.1 Terra

The sphere, airborne black and first reflected silhouettes preserve important geometry within the portrait frame. Paint deformation, contact order and forward transport are supported, with a small crimson endpoint overshoot. Major optical omissions dominate: short finite reflection sequences and smooth bands replace extensive, spatially ordered mirror imagery. Dark gloss and crisp upper emitter shapes provide partial material credit.

Qwen3.8-Max-0902

The central sphere and differentiated cyan/crimson interaction are supported. The tiny highlighted object above the sphere provides partial airborne-black evidence. The few isolated sphere and panel images preserve limited optical relationships, but most of the repeating mirror-room structure is missing. Core score: 64.5/170; including the floor-damage reward: 64.5/180.

Score breakdown

CategoryGPT-6.1 TerraQwen3.8-Max-0902
State at 600 ms23.0/2523.0/25
Camera and placement11.0/1512.0/15
Reflections33.0/12029.0/120
Materials and scale7.5/108.0/10
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-6.1 Terra

A balanced serpent emblem with six attached outward heads, delicate scales and softly rounded bodies. Its compact silhouette reads clearly, but central routing does not establish every alternating crossing or crisp inward corner. Repetitive texture, limited facial anatomy and weak contact shadows constrain its organic character.

Qwen3.8-Max-0902

A coherent ornamental illustration with balanced framing, appealing color and legible magical accessories. The disconnected raised wrist, incorrect raised-arm side and palm orientation, bear-like facial proportions and shallow material modeling limit execution. Clean decoration and compact spatial balance remain strengths.

Score breakdown

CategoryGPT-6.1 TerraQwen3.8-Max-0902
Task & likeness7.5/107.5/10
Anatomy & construction6.5/106.5/10
Space & placement6.5/108.0/10
Light & reflections6.0/107.0/10
Purposeful detail6.5/107.5/10
Artistry & character6.5/107.0/10
Materials & effects6.0/107.5/10
Visual integrity6.0/106.5/10

Benchmark task

GPT-6.1 Terra

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.

Qwen3.8-Max-0902

A floating capybara in ornate robes tests character anatomy, layered fabric and the placement of surrounding luminous forms.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

GPT-6.1 Terra

A recognizable interpretation with developed facial shading, shaped sleeve folds and purposeful small features. These strengths support modest upward calibration, while the frontal torso, elongated proportions, schematic finger joints and unresolved seated support keep replication and construction uneven.

Qwen3.8-Max-0902

A recognizable, cohesive Mona Lisa interpretation with readable landscape layers and a restrained expression. Continuous body construction and clean contours support readability, but broad hands, simplified drapery, frontal symmetry and limited facial volume keep the execution basic and uneven.

Score breakdown

CategoryGPT-6.1 TerraQwen3.8-Max-0902
Task & likeness5.5/104.5/10
Anatomy & construction6.5/103.5/10
Space & placement4.5/105.0/10
Light & reflections6.5/105.0/10
Purposeful detail6.0/105.0/10
Artistry & character6.0/105.0/10
Materials & effects6.0/103.5/10
Visual integrity6.5/105.0/10

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

GPT-6.1 Terra

A coherent sunset illustration with clear prompt fulfillment, controlled framing and varied, purposeful small details. Simplified joints, frontal staging, flattened animal forms and weakly directional shadows limit its anatomical, spatial and physical sophistication.

Qwen3.8-Max-0902

A strong stylized beach illustration with coherent sunset color, lively dolphin arcs and balanced activity. Clean contours, readable ground contact and an aligned reflection support the finish. Schematic anatomy, sparse small-subject features, flat materials and repetitive water highlights limit physical depth and refinement.

Score breakdown

CategoryGPT-6.1 TerraQwen3.8-Max-0902
Task & likeness8.5/108.5/10
Anatomy & construction7.5/107.5/10
Space & placement6.5/107.5/10
Light & reflections5.5/108.0/10
Purposeful detail7.5/107.0/10
Artistry & character7.0/108.0/10
Materials & effects6.5/106.5/10
Visual integrity7.5/108.5/10

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

GPT-6.1 Terra

This benchmark has not been assessed yet.

Qwen3.8-Max-0902

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

GPT-6.1 Terra

A coherent cartoon with expressive animals, readable steering and a clear wake. Fine facial and hull details reward inspection. The main limits are the boatlike craft, simplified joints, weakly braced frontal raccoon and minimal directional lighting or material depth.

Qwen3.8-Max-0902

The riding arrangement and steering action are readable, supported by coherent visible attachments and useful character details. Clean shapes, strong color separation and clustered foam make the scene appealing and active. Stiff anatomy, crowded controls, limited directional lighting and simple surface treatments constrain sophistication.

Score breakdown

CategoryGPT-6.1 TerraQwen3.8-Max-0902
Task & likeness6.5/108.0/10
Anatomy & construction5.5/107.0/10
Space & placement6.0/107.0/10
Light & reflections5.0/106.5/10
Purposeful detail7.0/107.0/10
Artistry & character6.0/106.5/10
Materials & effects6.0/106.0/10
Visual integrity7.0/107.5/10

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

Same task instructions

Subject construction and spatial relationships.

The judgment

GPT-6.1 Terra

A coherent pelican cyclist with expressive proportions, purposeful feather detail and developed bicycle machinery. Continuous body contours, aligned wheels and readable pedal contacts support the scene. Simplified articulation, shallow modelling and an unresolved steering connection limit construction and placement.

Qwen3.8-Max-0902

An appealing graphic illustration with a recognizable pelican, readable bicycle and clean coastal composition. Steering contact and one connected pedal support the action. Ambiguous neck-to-torso construction, an unclear opposing pedal connection, shallow space and limited material and lighting effects constrain its execution.

Score breakdown

CategoryGPT-6.1 TerraQwen3.8-Max-0902
Task & likeness7.0/108.5/10
Anatomy & construction7.0/106.5/10
Space & placement6.0/107.0/10
Light & reflections5.5/106.0/10
Purposeful detail7.0/107.5/10
Artistry & character6.5/107.5/10
Materials & effects5.5/106.0/10
Visual integrity6.0/108.0/10

Benchmark task

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