STEALTHMARK · HEAD TO HEAD

All comparisons ↗

MiMo-V2.6-Pro vs LongCat-2.0

MiMo-V2.6-Pro leads LongCat-2.0 by 22.4 points on StealthMark, 47.9 to 25.5. It leads on 5 of the 7 benchmarks with results for both and LongCat-2.0 on 2. 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
25.5/100Overall rank 45/53

General Intelligence

44.3/100
17.2/100

Visual Intelligence

54.3/100
34.4/100

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

  • LongCat-2.0Multi-step reasoning not measured

Open or local

Open modelMIT
Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • MiMo-V2.6-Pro
  • LongCat-2.0
  • Other models
  • Median

DATASHEET

Specs and pricing

MiMo-V2.6-Pro scores higher on StealthMark, is 38% cheaper per output token and runs 34% faster in our speed test. Both take about 1M tokens of context.

  • MiMo-V2.6-Pro
  • LongCat-2.0
  • Other models
  • Median
PricePer 1M output tokens, input below
MiMo-V2.6-Pro: $0.8738% cheaper$0.43 inputLongCat-2.0: $1.20$0.30 input
Context windowTokens per request, max output below
MiMo-V2.6-Pro: 1MTied128K max outputLongCat-2.0: 1MTied
Output speedTokens per second, our measurement
MiMo-V2.6-Pro: 11634% fastertokens/sLongCat-2.0: 86tokens/s
SizeTotal and active parameters
MiMo-V2.6-Pro: 1.02T42B activeLongCat-2.0: Not disclosed
Developer
XiaomiMeituan
Released
21 Sep 2026Not published
Origin
ChinaBoth
Input → output
Text, image, video, audio → textText → text
Architecture
Sparse Mixture-of-Experts; OpenRouter maps the route to the released Pro-RL checkpoint. The UltraSpeed edition is a separate routeMixture-of-Experts with LongCat Sparse Attention

Full datasheets, every price and sourceMiMo-V2.6-Pro ↗LongCat-2.0 ↗

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

Points per level

LevelMiMo-V2.6-ProLongCat-2.0
Level 1Second Thoughts
4 ptsOut of lives
No run
Level 2Pressure Pot
9 ptsOut of lives
No run
Level 3Hide or Flight
19 ptsSurvived
No run

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

Points per level

LevelMiMo-V2.6-ProLongCat-2.0
Level 1Hold the door
5.2 ptsCleared
No run
Level 2Crossfeed
9 ptsClearedFinished early · 1 beacon left
No run
Level 3Relay vault
17.2 ptsClearedFinished early · 1 beacon left
No run
Level 4Passing bay
16 ptsClearedFinished early · 3 beacons left
No run
Level 5Second thoughts
20.4 ptsCleared
No run

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.

LongCat-2.0

Cyan lies on the sphere's facing middle rather than showing its recent interaction near the apex. Separate airborne black and elongated crimson support part of the timing sequence. Small side images and an overlapping lower image provide limited reflection ordering, but recursive room structure, nested imagery and emitter mappings are largely absent. The main sphere is smaller and higher in the frame than prescribed, and the surfaces have a soft, matte appearance.

Score breakdown

CategoryMiMo-V2.6-ProLongCat-2.0
State at 600 ms23.0/259.5/25
Camera and placement12.0/156.5/15
Reflections19.0/12012.5/120
Materials and scale7.5/105.5/10
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.

LongCat-2.0

Amber slit eyes, a pointed beak, cream feathers and gold-trimmed black clothing establish the secretive owl rogue. The head appears frontal rather than lowered, with much of the face exposed. The centered silhouette is effective, but stiff cloak geometry, shallow facial modeling and extremely dark clothing limit depth and finish. Sparse gold markings suggest the requested circuitry only loosely.

Score breakdown

CategoryMiMo-V2.6-ProLongCat-2.0
Task & likeness6.5/107.0/10
Anatomy & construction5.0/106.0/10
Space & placement5.5/106.0/10
Light & reflections6.5/105.5/10
Purposeful detail6.5/106.0/10
Artistry & character5.0/106.5/10
Materials & effects6.5/105.5/10
Visual integrity6.0/106.5/10

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.

LongCat-2.0

A cloaked owl with luminous eyes tests expression, fabric folds and the separation of dark forms.

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.

LongCat-2.0

The centered portrait, slight smile, overlapping hands and distant landscape suggest Mona Lisa, but replication is weak. The face has little volume, the shoulders and torso form a narrow wedge, and the hands are fingerless ovals with unresolved wrists. Broad gray background bands provide limited depth. A bright head rim and pale hands contrast with an almost featureless dark figure.

Score breakdown

CategoryMiMo-V2.6-ProLongCat-2.0
Task & likeness3.5/100.5/10
Anatomy & construction3.5/100.5/10
Space & placement4.0/100.5/10
Light & reflections5.0/100.5/10
Purposeful detail3.0/100.0/10
Artistry & character4.0/100.5/10
Materials & effects4.0/100.0/10
Visual integrity6.0/100.5/10

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.

LongCat-2.0

The sunset, palms, birds and beach animals create a cheerful, readable scene. Clean silhouettes and a vivid sky establish the composition, but construction remains schematic. The right palm appears rooted in open water, shadows have limited connection to the sunset, and the sun’s reflection consists of rigid bands. Small creatures and beach equipment are recognizable but minimally developed.

Score breakdown

CategoryMiMo-V2.6-ProLongCat-2.0
Task & likeness8.5/107.5/10
Anatomy & construction5.0/105.5/10
Space & placement6.0/105.5/10
Light & reflections6.5/106.0/10
Purposeful detail6.5/105.0/10
Artistry & character5.0/105.0/10
Materials & effects6.0/103.0/10
Visual integrity6.0/104.0/10

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.

LongCat-2.0

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.

LongCat-2.0

The raccoon is recognizable and expressive, with a clear mask and striped tail. The dog's anatomy is poorly resolved, and the flattened craft lacks convincing steering and seating. Feet extend below the hull, weakening the sense of support. An appealing palette, clean shapes and decorative water effects give the illustration some polish.

Score breakdown

CategoryMiMo-V2.6-ProLongCat-2.0
Task & likeness7.0/104.0/10
Anatomy & construction5.0/103.0/10
Space & placement5.5/104.5/10
Light & reflections5.5/105.5/10
Purposeful detail6.0/106.0/10
Artistry & character4.0/103.0/10
Materials & effects5.5/105.5/10
Visual integrity4.5/105.0/10

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.

LongCat-2.0

A clearly recognizable pelican cycles through a well-composed coastal sunset. Warm colors, flowing scarf, feather contours and bicycle details give the illustration character. The legs connect to the body, but the farther foot's pedal contact and the wing's handlebar grip remain ambiguous. Clean vector shapes provide polish, with limited material texture and directional shading.

Score breakdown

CategoryMiMo-V2.6-ProLongCat-2.0
Task & likeness6.5/108.5/10
Anatomy & construction5.0/107.0/10
Space & placement6.0/108.0/10
Light & reflections5.5/107.5/10
Purposeful detail6.0/108.0/10
Artistry & character6.0/108.5/10
Materials & effects5.5/107.0/10
Visual integrity6.0/108.5/10

Benchmark task

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