STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Kimi K3.1 Pro vs Qwen3.8-Max-0902

Qwen3.8-Max-0902 leads Kimi K3.1 Pro by 6.6 points on StealthMark, 63.3 to 56.7. It leads on 7 of 9 benchmarks, including both games, and Kimi K3.1 Pro on 2. Qwen3.8-Max-0902 scores higher on Ground Truth.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

56.7/100Overall rank 11/53
63.3/100Overall rank 6/53

General Intelligence

53.9/100
62.7/100

Visual Intelligence

62.0/100
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

  • Kimi K3.1 Pro
  • Qwen3.8-Max-0902
  • Other models
  • Median

DATASHEET

Specs and pricing

Kimi K3.1 Pro runs 1.5× faster in our speed test. Qwen3.8-Max-0902 scores higher on StealthMark and is 2× cheaper per output token. Both take about 1M tokens of context.

  • Kimi K3.1 Pro
  • Qwen3.8-Max-0902
  • Other models
  • Median
PricePer 1M output tokens, input below
Kimi K3.1 Pro: $10$2 inputQwen3.8-Max-0902: $4.952× cheaper$1.65 input
Context windowTokens per request, max output below
Kimi K3.1 Pro: 1MTied1M max outputQwen3.8-Max-0902: 1MTied128K max output
Output speedTokens per second, our measurement
Kimi K3.1 Pro: 1171.5× fastertokens/sQwen3.8-Max-0902: 76tokens/s
SizeTotal and active parameters
Kimi K3.1 Pro: 2.8T104B activeEstimatedQwen3.8-Max-0902: 2.4T95B activeEstimated
Developer
Moonshot AIQwen / Alibaba Cloud
Released
23 Oct 20262 Sep 2026
Origin
ChinaBoth
Input → output
Text, image, video → textText, image → text
Architecture
Post-trained version of Kimi K3, a Mixture-of-Experts modelMixture-of-Experts; hosted version based on the open Qwen3.8-2.4T-A95B

Full datasheets, every price and sourceKimi K3.1 Pro ↗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.

Kimi K3.1 Pro 61.1/100Rank 10/47

Survived 1 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Qwen3.8-Max-0902 72.4/100Rank 4/47

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

Points per level

LevelKimi K3.1 ProQwen3.8-Max-0902
Level 1Second Thoughts
15 ptsOut of lives
27 ptsSurvived
Level 2Pressure Pot
12 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.

Kimi K3.1 Pro 81.8/100Rank 8/48

Cleared 5 of 5
Latch: complete playing field
Level 519.8 ptsTurn 31 / 40

Qwen3.8-Max-0902 82.6/100Rank 6/48

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

Points per level

LevelKimi K3.1 ProQwen3.8-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
18.2 ptsClearedFinished early · 3 beacons left
18.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
19.8 ptsCleared
20.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Kimi K3.1 Pro

The settled sphere, separate airborne black paint and crimson-before-cyan interaction are supported, with a modest crimson travel overshoot. A shared downward framing displacement remains after accounting for the square canvas. The principal limitation is the reflection system: sparse sphere copies and generic curved bands omit most of the ordered mirror-room structure. Materials receive a small upward revision because bounded bright images and dark bands visibly establish some polish, while soft shading and bulky paint remain separate weaknesses.

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

CategoryKimi K3.1 ProQwen3.8-Max-0902
State at 600 ms23.5/2523.0/25
Camera and placement10.5/1512.0/15
Reflections26.0/12029.0/120
Materials and scale7.0/108.0/10
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

Kimi K3.1 Pro

The transformed reflection, attentive pose and constellation anatomy clearly communicate introspection. Purposeful fine details enrich a coherent composition. Tubular limbs, crowded lower-body overlaps, shallow depth and limited cast lighting keep the overall execution within the competent range.

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

CategoryKimi K3.1 ProQwen3.8-Max-0902
Task & likeness8.0/107.5/10
Anatomy & construction5.5/106.5/10
Space & placement6.5/108.0/10
Light & reflections6.5/107.0/10
Purposeful detail7.5/107.5/10
Artistry & character7.0/107.0/10
Materials & effects7.0/107.5/10
Visual integrity7.0/106.5/10

Benchmark task

Kimi K3.1 Pro

An imagined creature encounters its reflection. The scene tests original character design, visual self-interpretation and the relationship between a subject and its reflected image.

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

Kimi K3.1 Pro

A coherent, recognizable interpretation with controlled color and readable landscape layers. Replication is limited by the frontal seated construction, elongated facial proportions and oversized, weakly articulated hands. Smooth shading supplies some volume but little of the reference's subtle expression, fabric structure or atmospheric transitions.

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

CategoryKimi K3.1 ProQwen3.8-Max-0902
Task & likeness5.0/104.5/10
Anatomy & construction5.0/103.5/10
Space & placement5.5/105.0/10
Light & reflections6.0/105.0/10
Purposeful detail5.5/105.0/10
Artistry & character6.0/105.0/10
Materials & effects5.0/103.5/10
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

Kimi K3.1 Pro

A coherent, playful beach illustration with readable animals, an organized composition and an aligned sunset reflection. Connected silhouettes, sand texture and atmospheric effects demonstrate controlled execution. Simplified joints, flattened foreground viewpoints and inconsistent shadows limit anatomical and spatial credibility.

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

CategoryKimi K3.1 ProQwen3.8-Max-0902
Task & likeness8.5/108.5/10
Anatomy & construction5.5/107.5/10
Space & placement5.5/107.5/10
Light & reflections6.5/108.0/10
Purposeful detail6.5/107.0/10
Artistry & character5.5/108.0/10
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

Kimi K3.1 Pro

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

Kimi K3.1 Pro

The additional comparisons support retaining the assessment. Readable steering, shaped animal contours and purposeful details coexist with simplified joints, a frontal passenger whose seated weight is weakly conveyed, and limited physical lighting. The angled craft establishes more depth than the riding pose resolves.

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

CategoryKimi K3.1 ProQwen3.8-Max-0902
Task & likeness7.0/108.0/10
Anatomy & construction5.5/107.0/10
Space & placement6.0/107.0/10
Light & reflections5.5/106.5/10
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

Kimi K3.1 Pro

A characterful coastal illustration with controlled contours and varied feather, accessory and bicycle detail. Layered scenery and subtle shading enrich the presentation. Soft leg articulation, unresolved riding contacts, shallow depth and generalized lighting limit physical precision.

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

CategoryKimi K3.1 ProQwen3.8-Max-0902
Task & likeness8.5/108.5/10
Anatomy & construction7.5/106.5/10
Space & placement6.5/107.0/10
Light & reflections6.5/106.0/10
Purposeful detail7.5/107.5/10
Artistry & character7.5/107.5/10
Materials & effects6.5/106.0/10
Visual integrity7.5/108.0/10

Benchmark task

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