STEALTHMARK · HEAD TO HEAD

All comparisons ↗

MiMo-V2.6-Pro vs GLM-5.3-Flash

GLM-5.3-Flash leads MiMo-V2.6-Pro by 0.9 points on StealthMark, 48.8 to 47.9. It leads on 6 of 9 benchmarks and MiMo-V2.6-Pro on 3, including both games. MiMo-V2.6-Pro scores higher on Newton's Mirror, with its largest category advantage in state at 600 ms.

See the difference ↘
All results ↗
Model guide ↗

Overall StealthMark

47.9/100Overall rank 21/53
48.8/100Overall rank 19/53

General Intelligence

44.3/100
42.2/100

Visual Intelligence

54.3/100
59.4/100

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

Open or local

Open modelMIT
Local modelOpen model · MIT

BENCHMARK BY BENCHMARK

Where each model leads

  • MiMo-V2.6-Pro
  • GLM-5.3-Flash
  • Other models
  • Median

DATASHEET

Specs and pricing

MiMo-V2.6-Pro runs 30% faster in our speed test. GLM-5.3-Flash scores higher on StealthMark and is 1.7× cheaper per output token. Both take about 1M tokens of context.

  • MiMo-V2.6-Pro
  • GLM-5.3-Flash
  • Other models
  • Median
PricePer 1M output tokens, input below
MiMo-V2.6-Pro: $0.87$0.43 inputGLM-5.3-Flash: $0.501.7× cheaper$0.15 input
Context windowTokens per request, max output below
MiMo-V2.6-Pro: 1MTied128K max outputGLM-5.3-Flash: 1MTied131K max output
Output speedTokens per second, our measurement
MiMo-V2.6-Pro: 11630% fastertokens/sGLM-5.3-Flash: 89tokens/s
SizeTotal and active parameters
MiMo-V2.6-Pro: 1.02T42B activeGLM-5.3-Flash: 320B18B active
Developer
XiaomiZ.AI
Released
21 Sep 202626 Aug 2026
Origin
ChinaNot published
Input → output
Text, image, video, audio → textText, image → text
Architecture
Sparse Mixture-of-Experts; OpenRouter maps the route to the released Pro-RL checkpoint. The UltraSpeed edition is a separate routeHybrid sparse and linear attention MoE

Full datasheets, every price and sourceMiMo-V2.6-Pro ↗GLM-5.3-Flash ↗

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.

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

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

GLM-5.3-Flash 49.0/100Rank 27/472 of 3 levels

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

Points per level

LevelMiMo-V2.6-ProGLM-5.3-Flash
Level 1Second Thoughts
4 ptsOut of lives
9 ptsOut of lives
Level 2Pressure Pot
9 ptsOut of lives
Pending
Level 3Hide or Flight
19 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.

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

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

GLM-5.3-Flash 4.0/100Rank 48/483 of 5 levels

3 of 5 played
Latch: complete playing field
Level 30.6 ptsTurn 33 / 36

Points per level

LevelMiMo-V2.6-ProGLM-5.3-Flash
Level 1Hold the door
5.2 ptsCleared
4.4 ptsCleared
Level 2Crossfeed
9 ptsClearedFinished early · 1 beacon left
5.2 ptsFinished early
Level 3Relay vault
17.2 ptsClearedFinished early · 1 beacon left
0.6 ptsFinished early
Level 4Passing bay
16 ptsClearedFinished early · 3 beacons left
Pending
Level 5Second thoughts
20.4 ptsCleared
Not played

Newton's Mirror

Same task instructions

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

The judgment

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.

GLM-5.3-Flash

The setup is recognizable, but the paint interaction remains poorly established and off-center. The first wall and floor images provide coherent placement, scale, silhouette and occlusion cues, with faint lower echoes. Missing receding chains, nested imagery and ordered emitter mappings leave the reflection system heavily simplified. Dull shading does not convincingly depict polished steel or mirrors.

Score breakdown

CategoryMiMo-V2.6-ProGLM-5.3-Flash
State at 600 ms23.0/2514.0/25
Camera and placement12.0/159.0/15
Reflections19.0/12021.5/120
Materials and scale7.5/103.5/10
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

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.

GLM-5.3-Flash

The expressive emerald face, ivory horns, gold accents and fine veining closely match the brief. Rounded volumes and layered shading create an appealing mascot. Rear hoof placement is cramped, lighting is somewhat inconsistent, and conspicuous white patches behind the muzzle interrupt the finish. Surfaces remain visibly stylized rather than photographic.

Score breakdown

CategoryMiMo-V2.6-ProGLM-5.3-Flash
Task & likeness6.5/108.5/10
Anatomy & construction5.0/107.5/10
Space & placement5.5/107.5/10
Light & reflections6.5/108.0/10
Purposeful detail6.5/107.5/10
Artistry & character5.0/107.5/10
Materials & effects6.5/107.5/10
Visual integrity6.0/107.0/10

Benchmark task

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.

GLM-5.3-Flash

A rounded jade bull raising a hoof tests anatomy, balance and the appearance of polished stone and metal.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

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.

GLM-5.3-Flash

The crossed arms, green dress and hazy landscape clearly evoke Mona Lisa. Replication is limited by the frontal pose, oversized eyes, elongated face and pronounced lips. Overlapping finger strips lack convincing knuckles and palm volume. The balanced framing and soft shading provide cohesion, but simplified anatomy, repetitive folds and blurred scenery keep the portrait basic.

Score breakdown

CategoryMiMo-V2.6-ProGLM-5.3-Flash
Task & likeness3.5/104.5/10
Anatomy & construction3.5/104.5/10
Space & placement4.0/106.0/10
Light & reflections5.0/106.0/10
Purposeful detail3.0/105.0/10
Artistry & character4.0/105.0/10
Materials & effects4.0/105.5/10
Visual integrity6.0/104.0/10

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

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.

GLM-5.3-Flash

Framing palms, a vivid sunset palette and balanced kite and umbrella create an appealing beach illustration. Layered water and shoreline give the scene depth, while aligned reflections reinforce the sunset. Small accessories add character and reward inspection. Figures and animals remain schematic, some overlaps are difficult to read, and simplified shadows and flat surfaces limit physical richness.

Score breakdown

CategoryMiMo-V2.6-ProGLM-5.3-Flash
Task & likeness8.5/108.0/10
Anatomy & construction5.0/107.0/10
Space & placement6.0/108.0/10
Light & reflections6.5/108.0/10
Purposeful detail6.5/108.0/10
Artistry & character5.0/108.5/10
Materials & effects6.0/106.5/10
Visual integrity6.0/108.0/10

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

MiMo-V2.6-Pro

This benchmark has not been assessed yet.

GLM-5.3-Flash

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

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.

GLM-5.3-Flash

Recognizable animals, a supported riding pose and an energetic diagonal composition make the scene readable. Character details and spray strengthen its appeal. Simple limb construction, limited directional lighting and an unresolved steering connection constrain the drawing's physical precision and complexity.

Score breakdown

CategoryMiMo-V2.6-ProGLM-5.3-Flash
Task & likeness7.0/107.0/10
Anatomy & construction5.0/105.0/10
Space & placement5.5/106.0/10
Light & reflections5.5/105.0/10
Purposeful detail6.0/106.5/10
Artistry & character4.0/104.0/10
Materials & effects5.5/106.0/10
Visual integrity4.5/106.0/10

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

Different task instructions

Subject construction and spatial relationships.

The judgment

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.

GLM-5.3-Flash

The pelican, bicycle and seaside setting form a clear, appealing illustration. Circular wheels, readable frame tubes and clean silhouettes support the action. The legs connect to the body, but the far foot's pedal contact and wing-to-handlebar junction are cramped. Simple shading, uniform wave marks and limited surface texture keep the rendering relatively flat.

Score breakdown

CategoryMiMo-V2.6-ProGLM-5.3-Flash
Task & likeness6.5/108.5/10
Anatomy & construction5.0/107.5/10
Space & placement6.0/107.5/10
Light & reflections5.5/106.5/10
Purposeful detail6.0/107.0/10
Artistry & character6.0/108.0/10
Materials & effects5.5/106.5/10
Visual integrity6.0/108.0/10

Benchmark task

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