STEALTHMARK · HEAD TO HEAD

All comparisons ↗

GLM-5.3 vs MiMo-V2.6-Pro

MiMo-V2.6-Pro leads GLM-5.3 by 2.8 points on StealthMark, 47.9 to 45.1. It leads on 6 of 9 benchmarks, including both games, and GLM-5.3 on 3. 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 ↗
All results ↗

Overall StealthMark

45.1/100Overall rank 27/53
47.9/100Overall rank 21/53

General Intelligence

37.6/100
44.3/100

Visual Intelligence

57.2/100
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 modelGLM-5.3 License
Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

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

DATASHEET

Specs and pricing

MiMo-V2.6-Pro scores higher on StealthMark, is 5.1× cheaper per output token and runs 35% faster in our speed test. Both take about 1M tokens of context.

  • GLM-5.3
  • MiMo-V2.6-Pro
  • Other models
  • Median
PricePer 1M output tokens, input below
GLM-5.3: $4.40$1.40 inputMiMo-V2.6-Pro: $0.875.1× cheaper$0.43 input
Context windowTokens per request, max output below
GLM-5.3: 1MTied128K max outputMiMo-V2.6-Pro: 1MTied128K max output
Output speedTokens per second, our measurement
GLM-5.3: 86tokens/sMiMo-V2.6-Pro: 11635% fastertokens/s
SizeTotal and active parameters
GLM-5.3: 753BAll activeMiMo-V2.6-Pro: 1.02T42B active
Developer
Z.AIXiaomi
Released
17 Aug 202621 Sep 2026
Origin
ChinaBoth
Input → output
Text → textText, image, video, audio → text
Architecture
GLM MoE with DSA sparse attentionSparse 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 sourceGLM-5.3 ↗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.

GLM-5.3 59.1/100Rank 22/472 of 3 levels

2 of 3 played
Foresight: complete playing field
Level 26 ptsTurn 10 / 18

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

LevelGLM-5.3MiMo-V2.6-Pro
Level 1Second Thoughts
27 ptsSurvived
4 ptsOut of lives
Level 2Pressure Pot
6 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
Pending
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.

GLM-5.3 25.6/100Rank 37/48

Cleared 2 of 5
Latch: complete playing field
Level 512.2 ptsTurn 14 / 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

LevelGLM-5.3MiMo-V2.6-Pro
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9 ptsCleared
9 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
7.6 ptsFinished early
17.2 ptsClearedFinished early · 1 beacon left
Level 4Passing bay
3.2 ptsFinished early
16 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
12.2 ptsFinished early
20.4 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

GLM-5.3

The sphere has readable rounded volume, and the compact black blob remains distinctly above it, supporting pre-impact separation. The extensive red and cyan coatings do not establish the required interaction history or paint scale. The sphere and black are substantially displaced downward. A centered upper panel, paired side patches and a vertically aligned partial floor image provide limited reflection cues, but ordered mirror-room repetitions and curved spherical imagery are largely missing.

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

CategoryGLM-5.3MiMo-V2.6-Pro
State at 600 ms9.0/2523.0/25
Camera and placement9.0/1512.0/15
Reflections10.0/12019.0/120
Materials and scale7.0/107.5/10
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

GLM-5.3

A luminous organic creature meets a geometric reflection in a carefully framed oval mirror. Shared glowing cores and fingertip contact make the introspective symbolism clear. Gold, cream and blue establish a controlled hierarchy. The creature’s lower anatomy and shoulder transition remain loosely defined, while ground contact and reflected depth are mostly symbolic. Elegant vector illustration rather than photographic rendering.

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

CategoryGLM-5.3MiMo-V2.6-Pro
Task & likeness9.0/106.5/10
Anatomy & construction7.0/105.0/10
Space & placement7.0/105.5/10
Light & reflections8.0/106.5/10
Purposeful detail8.0/106.5/10
Artistry & character7.0/105.0/10
Materials & effects7.5/106.5/10
Visual integrity8.0/106.0/10

Benchmark task

GLM-5.3

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

GLM-5.3

Recognizable Mona Lisa motifs include the dark veil, restrained smile, folded hands and muted landscape. Clean silhouettes and balanced framing support the portrait, but the frontal symmetry, elongated face, minimally articulated hands and broad background bands make the replication basic. Facial shading offers some volume; clothing and landscape remain mostly flat.

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

CategoryGLM-5.3MiMo-V2.6-Pro
Task & likeness3.0/103.5/10
Anatomy & construction2.0/103.5/10
Space & placement3.0/104.0/10
Light & reflections4.5/105.0/10
Purposeful detail3.0/103.0/10
Artistry & character2.5/104.0/10
Materials & effects3.5/104.0/10
Visual integrity4.0/106.0/10

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

GLM-5.3

A cohesive, colorful beach illustration with an inviting sunset, readable animals and playful foreground objects. Crisp silhouettes and small accessories reward inspection. Depth remains shallow, airborne dolphins lack convincing launch splashes, and several objects lack grounding shadows. The broad dark shape across the sun weakens the focal hierarchy.

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

CategoryGLM-5.3MiMo-V2.6-Pro
Task & likeness8.5/108.5/10
Anatomy & construction7.5/105.0/10
Space & placement7.0/106.0/10
Light & reflections7.0/106.5/10
Purposeful detail8.0/106.5/10
Artistry & character7.5/105.0/10
Materials & effects6.5/106.0/10
Visual integrity7.5/106.0/10

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

GLM-5.3

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

GLM-5.3

The raccoon rides on the dog's back, and the dog reaches toward visible handlebars. Expressive faces and clean colors make the action readable. Overlapping paws and hindquarters weaken anatomical clarity, while the vehicle resembles a flat board with a thin steering post. The wake suggests motion, but water contact, shadows and reflections receive little development.

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

CategoryGLM-5.3MiMo-V2.6-Pro
Task & likeness6.5/107.0/10
Anatomy & construction4.5/105.0/10
Space & placement5.5/105.5/10
Light & reflections4.0/105.5/10
Purposeful detail5.0/106.0/10
Artistry & character4.0/104.0/10
Materials & effects5.0/105.5/10
Visual integrity7.5/104.5/10

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

GLM-5.3

The expressive pelican, broad bill and clean coastal composition make the subject immediately readable. Both legs connect to the body and reach pedals, but the front wheel lacks a connected fork and the wings do not engage visible handlebars. Crisp spokes and feather lines add interest; flat lighting, absent ground shadows and a fish floating above the horizon weaken physical coherence.

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

CategoryGLM-5.3MiMo-V2.6-Pro
Task & likeness7.5/106.5/10
Anatomy & construction4.0/105.0/10
Space & placement6.0/106.0/10
Light & reflections4.0/105.5/10
Purposeful detail6.5/106.0/10
Artistry & character6.5/106.0/10
Materials & effects5.0/105.5/10
Visual integrity5.5/106.0/10

Benchmark task

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