STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Kimi K3 vs MiMo-V2.6-Pro

Kimi K3 leads MiMo-V2.6-Pro by 2.7 points on StealthMark, 50.6 to 47.9. It leads on 6 of 9 benchmarks, including Latch, and MiMo-V2.6-Pro on 3, including Foresight. Kimi K3 scores higher on Raccoon, with its largest category advantage in anatomy & construction.

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All results ↗
All results ↗

Overall StealthMark

50.6/100Overall rank 15/53
47.9/100Overall rank 21/53

General Intelligence

44.4/100
44.3/100

Visual Intelligence

61.4/100
54.3/100

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

Open or local

Open modelKimi K3 License
Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • Kimi K3
  • MiMo-V2.6-Pro
  • Other models
  • Median

DATASHEET

Specs and pricing

Kimi K3 scores higher on StealthMark. MiMo-V2.6-Pro is 12× cheaper per output token. Both take about 1M tokens of context.

  • Kimi K3
  • MiMo-V2.6-Pro
  • Other models
  • Median
PricePer 1M output tokens, input below
Kimi K3: $10.80$0.24 inputMiMo-V2.6-Pro: $0.8712× cheaper$0.43 input
Context windowTokens per request, max output below
Kimi K3: 1MTied1M max outputMiMo-V2.6-Pro: 1MTied128K max output
Output speedTokens per second, our measurement
Kimi K3: 115Tiedtokens/sMiMo-V2.6-Pro: 116Tiedtokens/s
SizeTotal and active parameters
Kimi K3: 2.8T104B activeMiMo-V2.6-Pro: 1.02T42B active
Developer
Moonshot AIXiaomi
Released
16 Jul 202621 Sep 2026
Origin
ChinaBoth
Input → output
Text, image → textText, image, video, audio → text
Architecture
Mixture-of-Experts with KDA + Gated MLA attention, 896 experts and native vision encoderSparse Mixture-of-Experts; OpenRouter maps the route to the released Pro-RL checkpoint. The UltraSpeed edition is a separate route

Full datasheets, every price and sourceKimi K3 ↗MiMo-V2.6-Pro ↗

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 52.7/100Rank 16/47

Survived 0 of 3
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

MiMo-V2.6-Pro 54.6/100Rank 13/47

Survived 1 of 3
Foresight: complete playing field
Level 319 ptsTurn 20 / 20

Points per level

LevelKimi K3MiMo-V2.6-Pro
Level 1Second Thoughts
17 ptsOut of lives
4 ptsOut of lives
Level 2Pressure Pot
10 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
11 ptsOut of lives
19 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 57.7/100Rank 20/48

Cleared 3 of 5
Latch: complete playing field
Level 514.2 ptsTurn 4 / 40

MiMo-V2.6-Pro 52.6/100Rank 22/48

Cleared 5 of 5
Latch: complete playing field
Level 520.4 ptsTurn 28 / 40

Points per level

LevelKimi K3MiMo-V2.6-Pro
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.6 ptsCleared
9 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
18.2 ptsClearedFinished early · 3 beacons left
17.2 ptsClearedFinished early · 1 beacon left
Level 4Passing bay
14.2 ptsFinished early
16 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
14.2 ptsFinished early
20.4 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Kimi K3

The room fills the complete portrait frame without visible borders or labels. The main sphere and airborne black are convincingly placed within the portrait frame. Paint ordering is supported, but its contact and transport history remains weakly expressed. Symmetric wall ghosts, inverted floor imagery and panel echoes establish a basic mirror system. Diffuse gradients dominate, with little ordered nested imagery or repeated emitter mapping on either planar or spherical surfaces. The wall images sit too low, and the floor image is unusually large and low.

MiMo-V2.6-Pro

The main framing and visible paint-contact story are well supported. Major optical omissions dominate the result: sparse repetitions, undersized first images, missing outer chains and absent curved nested imagery prevent a coherent mirror-room system. The metallic forms remain convincing in volume but have a soft illustrative finish.

Score breakdown

CategoryKimi K3MiMo-V2.6-Pro
State at 600 ms18.0/2523.0/25
Camera and placement8.0/1512.0/15
Reflections24.0/12019.0/120
Materials and scale6.5/107.5/10
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

Kimi K3

The indigo creature and warm reflected counterpart create a balanced, contemplative composition. Equations, constellations and book emblems give the transformation meaning. Clean silhouettes and controlled glow support the scene, but minimally articulated legs, shallow spatial cues and smooth, generalized surfaces limit its anatomical and material richness.

MiMo-V2.6-Pro

An appealing rabbit with balanced framing, expressive eyes and purposeful costume accents. Simple frontal construction limits anatomical and spatial accomplishment. The orange orb provides an effective luminous focal point, but unreadable wrist connections weaken the requested gestures and prevent stronger integrity credit.

Score breakdown

CategoryKimi K3MiMo-V2.6-Pro
Task & likeness9.0/106.5/10
Anatomy & construction7.0/105.0/10
Space & placement8.0/105.5/10
Light & reflections7.5/106.5/10
Purposeful detail8.0/106.5/10
Artistry & character8.5/105.0/10
Materials & effects7.5/106.5/10
Visual integrity8.0/106.0/10

Benchmark task

Kimi K3

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.

MiMo-V2.6-Pro

A small rabbit in an explorer outfit floats with a luminous orb. The scene tests character anatomy, pose and the placement of geometric forms around it.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Kimi K3

The centered portrait, dark veil, folded hands and misty landscape clearly evoke Mona Lisa. Replication is limited by the elongated neck, simplified facial proportions and oval hands with shallow finger marks. Soft shading gives some volume, but pervasive blur substitutes for controlled painterly transitions and precise detail.

MiMo-V2.6-Pro

The portrait is recognizable through its dark silhouette, slight smile and muted landscape, but replication is weak. A frontal, oversized head and symmetric torso replace the reference's turned seated pose; angular, separated hands omit its central gesture. Smooth shading maintains coherence while anatomical detail, depth and material rendering remain basic.

Score breakdown

CategoryKimi K3MiMo-V2.6-Pro
Task & likeness4.5/103.5/10
Anatomy & construction3.5/103.5/10
Space & placement4.5/104.0/10
Light & reflections4.5/105.0/10
Purposeful detail4.0/103.0/10
Artistry & character4.5/104.0/10
Materials & effects4.5/104.0/10
Visual integrity5.0/106.0/10

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

A coordinated sunset palette, expressive silhouettes and varied small details create a lively, appealing beach illustration. The central sun and framing palm and umbrella organize the busy scene, with clean contours preserving readability. Bodies and people remain diagrammatic, depth is shallow, and inverted figure reflections cross matte-looking sand without convincing surface lighting. Materials and movement are mostly conveyed through flat shapes.

MiMo-V2.6-Pro

A readable sunset beach with clear requested subjects, appealing framing and purposeful accessories. Schematic anatomy, flattened foreground objects, repetitive water highlights and sparse directional shadows limit construction and physical depth. The kite's unresolved anchor also constrains integrity.

Score breakdown

CategoryKimi K3MiMo-V2.6-Pro
Task & likeness8.5/108.5/10
Anatomy & construction7.0/105.0/10
Space & placement7.0/106.0/10
Light & reflections6.5/106.5/10
Purposeful detail8.5/106.5/10
Artistry & character8.5/105.0/10
Materials & effects6.5/106.0/10
Visual integrity7.0/106.0/10

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

Kimi K3

This benchmark has not been assessed yet.

MiMo-V2.6-Pro

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

The raccoon rides on the dog's back, and the dog's paw meets a steering assembly connected to the red hull. Expressive faces, a warm sunset and sweeping spray create an appealing composition. Crowded body overlaps obscure some limb connections, and the raccoon's right ear appears slightly separated. Flat shading and stylized reflections limit volume and depth.

MiMo-V2.6-Pro

A coherent, cheerful cartoon with recognizable animals, readable steering contact and useful small details. The dog's orientation follows the craft more successfully than a wholly frontal pose would. Simple anatomy, weak raccoon grip and compressed seating contacts still limit physical credibility. Gradients and spray provide polish without resolving complex construction.

Score breakdown

CategoryKimi K3MiMo-V2.6-Pro
Task & likeness8.0/107.0/10
Anatomy & construction6.5/105.0/10
Space & placement7.5/105.5/10
Light & reflections7.0/105.5/10
Purposeful detail7.5/106.0/10
Artistry & character6.0/104.0/10
Materials & effects7.5/105.5/10
Visual integrity7.0/104.5/10

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

The pelican and bicycle are immediately recognizable, with an expressive bill, flowing scarf and cheerful composition. Both legs remain attached, but pedal connections and wing contact with the handlebar are weakly resolved. Wheel alignment and landscape layers are coherent. Clean outlines support the illustration, while flat surfaces and limited lighting keep it short of masterful execution.

MiMo-V2.6-Pro

The distinctive bill, continuous silhouette and detailed wheels establish a readable pelican cyclist. Shaped feathers and soft shading add character, but jointless legs, crowded pedal contacts, absent steering contact and loosely directional lighting limit the construction. The comparisons support retaining the baseline category scores.

Score breakdown

CategoryKimi K3MiMo-V2.6-Pro
Task & likeness8.0/106.5/10
Anatomy & construction6.5/105.0/10
Space & placement7.5/106.0/10
Light & reflections5.0/105.5/10
Purposeful detail6.5/106.0/10
Artistry & character6.0/106.0/10
Materials & effects6.0/105.5/10
Visual integrity6.5/106.0/10

Benchmark task

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