STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Fledge Alpha vs MiMo-V2.6-Pro

MiMo-V2.6-Pro leads Fledge Alpha by 12.1 points on StealthMark, 47.9 to 35.8. It leads on 4 of the 7 benchmarks with results for both and Fledge Alpha 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 ↘
Model guide ↗
All results ↗

Overall StealthMark

35.8/100Overall rank 38/53
47.9/100Overall rank 21/53

General Intelligence

27.1/100
44.3/100

Visual Intelligence

45.2/100
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

  • Fledge AlphaMulti-step reasoning not measured

Open or local

Open modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • Fledge Alpha
  • MiMo-V2.6-Pro
  • Other models
  • Median

DATASHEET

Specs and pricing

MiMo-V2.6-Pro scores higher on StealthMark and runs 1.8× faster in our speed test.

  • Fledge Alpha
  • MiMo-V2.6-Pro
  • Other models
  • Median
PricePer 1M output tokens, input below
Fledge Alpha: No list priceMiMo-V2.6-Pro: $0.87$0.43 input
Context windowTokens per request, max output below
Fledge Alpha: Not publishedMiMo-V2.6-Pro: 1M128K max output
Output speedTokens per second, our measurement
Fledge Alpha: 63tokens/sMiMo-V2.6-Pro: 1161.8× fastertokens/s
SizeTotal and active parameters
Fledge Alpha: Not disclosedMiMo-V2.6-Pro: 1.02T42B active
Developer
Not publishedXiaomi
Released
Not published21 Sep 2026
Origin
Not publishedChina
Input → output
Not publishedText, image, video, audio → text
Architecture
Not publishedSparse 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-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-Pro 54.6/100Rank 13/47

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

Points per level

LevelFledge AlphaMiMo-V2.6-Pro
Level 1Second Thoughts
No run
4 ptsOut of lives
Level 2Pressure Pot
No run
9 ptsOut of lives
Level 3Hide or Flight
No run
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-Pro 52.6/100Rank 22/48

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

Points per level

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

Newton's Mirror

Same task instructions

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

The judgment

Fledge Alpha

The candidate communicates a round metallic sphere, three paint colors and a separate airborne black blob. Its hovering support relationship, displaced framing and unresolved paint interaction limit physical credit. Sparse planar light ghosts and a soft sphere highlight provide little evidence for the required wall/floor repetitions and curved nested mirror imagery.

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

CategoryFledge AlphaMiMo-V2.6-Pro
State at 600 ms9.0/2523.0/25
Camera and placement5.0/1512.0/15
Reflections7.5/12019.0/120
Materials and scale3.5/107.5/10
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

Fledge Alpha

A coherent, appealing mascot with expressive eyes, a cheerful beak and a readable swept-back silhouette. Its larger forward foot and trailing feathers suggest a running stride, but the upright body, stiff legs and minimally articulated feet limit convincing motion. Clean flat shapes suit the brief, while uneven feather junctions and incomplete cream accents reduce polish.

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

CategoryFledge AlphaMiMo-V2.6-Pro
Task & likeness7.5/106.5/10
Anatomy & construction6.5/105.0/10
Space & placement7.0/105.5/10
Light & reflections5.5/106.5/10
Purposeful detail6.5/106.5/10
Artistry & character4.0/105.0/10
Materials & effects6.0/106.5/10
Visual integrity6.5/106.0/10

Benchmark task

Fledge Alpha

An eager young seabird running toward the viewer tests expressive anatomy, balance and a convincing forward-moving pose.

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

Fledge Alpha

A recognizable but basic Mona Lisa reinterpretation with a coherent silhouette and subdued palette. Curtain-like hair obscures much of the face, while elongated facial construction and oversized, minimally articulated hands substantially weaken replication. Soft shading supplies modest volume, but anatomy, landscape depth and purposeful detail remain underdeveloped.

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

CategoryFledge AlphaMiMo-V2.6-Pro
Task & likeness3.0/103.5/10
Anatomy & construction3.0/103.5/10
Space & placement2.5/104.0/10
Light & reflections2.5/105.0/10
Purposeful detail3.0/103.0/10
Artistry & character3.0/104.0/10
Materials & effects2.5/104.0/10
Visual integrity2.5/106.0/10

Benchmark task

An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.

Beach

Different task instructions

Creativity, perspective and visual beauty.

The judgment

Fledge Alpha

A cheerful, recognizable sunset beach with a cohesive warm palette and clear accessories. Simple construction, uncertain palm support, an ambiguous upper boundary and schematic reflections limit depth and finish. The scene communicates its subject successfully but lacks the developed forms, lighting and detail of exceptional illustration.

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

CategoryFledge AlphaMiMo-V2.6-Pro
Task & likeness7.5/108.5/10
Anatomy & construction4.0/105.0/10
Space & placement5.5/106.0/10
Light & reflections5.0/106.5/10
Purposeful detail3.0/106.5/10
Artistry & character3.0/105.0/10
Materials & effects2.5/106.0/10
Visual integrity4.0/106.0/10

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

Fledge Alpha

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

Fledge Alpha

An appealing sunset illustration with recognizable characters and a clear riding action. Color, expression and silhouette are stronger than anatomical construction: overlapping paws obscure support, the dog's steering limb is simplified, and the vehicle controls lack definition. The wake conveys movement, while lighting and water reflections remain decorative.

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

CategoryFledge AlphaMiMo-V2.6-Pro
Task & likeness8.5/107.0/10
Anatomy & construction5.5/105.0/10
Space & placement7.5/105.5/10
Light & reflections6.5/105.5/10
Purposeful detail7.0/106.0/10
Artistry & character5.5/104.0/10
Materials & effects7.0/105.5/10
Visual integrity4.5/104.5/10

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

Different task instructions

Subject construction and spatial relationships.

The judgment

Fledge Alpha

A clear, cheerful illustration with a recognizable pelican, coherent bicycle silhouette and tidy composition. Simplified leg articulation, steering contact, mechanical detail and lighting keep it at a competent illustrative level.

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

CategoryFledge AlphaMiMo-V2.6-Pro
Task & likeness8.0/106.5/10
Anatomy & construction6.0/105.0/10
Space & placement6.5/106.0/10
Light & reflections4.5/105.5/10
Purposeful detail5.5/106.0/10
Artistry & character5.0/106.0/10
Materials & effects5.5/105.5/10
Visual integrity6.5/106.0/10

Benchmark task

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