STEALTHMARK · HEAD TO HEAD

All comparisons ↗

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

MiMo-V2.6-Pro leads MiMo-V2.6-Flash by 3.3 points on StealthMark, 47.9 to 44.6. It leads on 5 of 9 benchmarks, including both games, and MiMo-V2.6-Flash on 4. 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

44.6/100Overall rank 28/53
47.9/100Overall rank 21/53

General Intelligence

41.0/100
44.3/100

Visual Intelligence

49.8/100
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 modelMIT
Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

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

DATASHEET

Specs and pricing

MiMo-V2.6-Flash is 3.1× cheaper per output token and runs 4.7× faster in our speed test. MiMo-V2.6-Pro scores higher on StealthMark. Both take about 1M tokens of context.

  • MiMo-V2.6-Flash
  • MiMo-V2.6-Pro
  • Other models
  • Median
PricePer 1M output tokens, input below
MiMo-V2.6-Flash: $0.283.1× cheaper$0.14 inputMiMo-V2.6-Pro: $0.87$0.43 input
Context windowTokens per request, max output below
MiMo-V2.6-Flash: 1MTied128K max outputMiMo-V2.6-Pro: 1MTied128K max output
Output speedTokens per second, our measurement
MiMo-V2.6-Flash: 5474.7× fastertokens/sMiMo-V2.6-Pro: 116tokens/s
SizeTotal and active parameters
MiMo-V2.6-Flash: 309B15B activeMiMo-V2.6-Pro: 1.02T42B active
Developer
XiaomiBoth
Released
21 Sep 2026Both
Origin
ChinaBoth
Input → output
Text, image, video, audio → textBoth
Architecture
Released Flash-RL checkpoint: sparse Mixture-of-Experts; hosted Flash and MOPD variants are distinct artifactsSparse 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 sourceMiMo-V2.6-Flash ↗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.

MiMo-V2.6-Flash 71.3/100Rank 36/471 of 3 levels

1 of 3 played
Foresight: complete playing field
Level 212 ptsTurn 14 / 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

LevelMiMo-V2.6-FlashMiMo-V2.6-Pro
Level 1Second Thoughts
Pending
4 ptsOut of lives
Level 2Pressure Pot
12 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
Not played
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.

MiMo-V2.6-Flash 66.3/100Rank 27/483 of 5 levels

3 of 5 played
Latch: complete playing field
Level 318 ptsTurn 36 / 36

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

LevelMiMo-V2.6-FlashMiMo-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 ptsCleared
17.2 ptsClearedFinished early · 1 beacon left
Level 4Passing bay
Pending
16 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
Not played
20.4 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

MiMo-V2.6-Flash

The faint lower sphere image provides limited reflection evidence through reversed paint-color ordering. The wider reflection system and nested room imagery are absent. The colored beads do not resolve the required impact and transport history, while displaced paint positions and weak material rendering further limit the result.

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

CategoryMiMo-V2.6-FlashMiMo-V2.6-Pro
State at 600 ms5.0/2523.0/25
Camera and placement4.5/1512.0/15
Reflections6.5/12019.0/120
Materials and scale2.5/107.5/10
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

Same task instructions

Visual construction and creative interpretation.

The judgment

MiMo-V2.6-Flash

The centered rabbit has an appealing alert expression, a balanced silhouette, and a restrained technological palette. Outfit panels and orbital accents are cleanly resolved. The orb-holding paw has an ambiguous grip, the ears lack distinct angular bends, and the halo's interlocking construction is unclear. Soft shading suggests volume, but materials and spatial depth remain simplified.

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

CategoryMiMo-V2.6-FlashMiMo-V2.6-Pro
Task & likeness8.0/106.5/10
Anatomy & construction6.5/105.0/10
Space & placement7.0/105.5/10
Light & reflections7.0/106.5/10
Purposeful detail6.0/106.5/10
Artistry & character5.5/105.0/10
Materials & effects6.5/106.5/10
Visual integrity8.0/106.0/10

Benchmark task

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

Same task instructions

Precise visual recall and portrait reconstruction.

The judgment

MiMo-V2.6-Flash

The dark clothing, long hair, folded hands and hazy landscape make the reference recognizable. Replication is limited by the frontal symmetry, elongated face, wide staring eyes and downturned mouth. Both arms connect to the hands, but the overlapping palms and looplike fingers are poorly resolved. Soft facial shading provides some volume; the clothing and landscape remain broad, simplified shapes.

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

CategoryMiMo-V2.6-FlashMiMo-V2.6-Pro
Task & likeness3.0/103.5/10
Anatomy & construction2.5/103.5/10
Space & placement4.0/104.0/10
Light & reflections3.0/105.0/10
Purposeful detail4.0/103.0/10
Artistry & character2.5/104.0/10
Materials & effects3.5/104.0/10
Visual integrity5.5/106.0/10

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

MiMo-V2.6-Flash

The warm sunset, aligned reflection, framing palms and playful beach animals create an appealing, coherent scene. Small toys and shells remain readable. Drawing is simplified: animals have limited volume, water uses repetitive horizontal strokes, and foreground shadows do not consistently follow the central sun. Clean execution supports a competent illustration, but depth and material rendering remain modest.

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

CategoryMiMo-V2.6-FlashMiMo-V2.6-Pro
Task & likeness7.5/108.5/10
Anatomy & construction6.5/105.0/10
Space & placement7.0/106.0/10
Light & reflections6.0/106.5/10
Purposeful detail7.0/106.5/10
Artistry & character6.0/105.0/10
Materials & effects6.0/106.0/10
Visual integrity8.0/106.0/10

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

MiMo-V2.6-Flash

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

MiMo-V2.6-Flash

The raccoon riding the dog reads clearly, with expressive faces and a cheerful waterscape. The steering action is weak: no paw reaches the handlebar, which meets the dog's muzzle. The vehicle resembles a thin board with a steering post. Overlapping limbs obscure anatomy, while limited shadows, reflections and surface modeling keep the scene flat.

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

CategoryMiMo-V2.6-FlashMiMo-V2.6-Pro
Task & likeness6.5/107.0/10
Anatomy & construction4.0/105.0/10
Space & placement6.5/105.5/10
Light & reflections4.5/105.5/10
Purposeful detail5.5/106.0/10
Artistry & character4.0/104.0/10
Materials & effects5.5/105.5/10
Visual integrity6.0/104.5/10

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

MiMo-V2.6-Flash

The pelican is immediately recognizable, with an expressive eye and prominent pouch, and the landscape provides clear framing. Clean outlines and spokes support the cheerful illustration. Both feet visibly miss the bicycle's pedal mechanism, weakening the riding action. Simplified machinery, shallow depth and loosely directional shading limit the requested masterpiece quality.

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

CategoryMiMo-V2.6-FlashMiMo-V2.6-Pro
Task & likeness8.0/106.5/10
Anatomy & construction5.5/105.0/10
Space & placement7.0/106.0/10
Light & reflections6.0/105.5/10
Purposeful detail7.0/106.0/10
Artistry & character6.5/106.0/10
Materials & effects5.5/105.5/10
Visual integrity7.5/106.0/10

Benchmark task

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