STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Gemini 3.8 Flash vs MiMo-V2.6-Pro

Gemini 3.8 Flash and MiMo-V2.6-Pro share an overall StealthMark score of 47.9. Gemini 3.8 Flash leads on 5 of 9 benchmarks, including Latch, and MiMo-V2.6-Pro on 4, including Foresight. MiMo-V2.6-Pro scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

47.9/100Overall rank 20/53
47.9/100Overall rank 21/53

General Intelligence

43.9/100
44.3/100

Visual Intelligence

55.2/100
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 modelMIT

BENCHMARK BY BENCHMARK

Where each model leads

  • Gemini 3.8 Flash
  • MiMo-V2.6-Pro
  • Other models
  • Median

DATASHEET

Specs and pricing

Gemini 3.8 Flash runs 47% faster in our speed test. MiMo-V2.6-Pro is 4.3× cheaper per output token. Both take about 1M tokens of context.

  • Gemini 3.8 Flash
  • MiMo-V2.6-Pro
  • Other models
  • Median
PricePer 1M output tokens, input below
Gemini 3.8 Flash: $3.75$0.75 inputMiMo-V2.6-Pro: $0.874.3× cheaper$0.43 input
Context windowTokens per request, max output below
Gemini 3.8 Flash: 1MTied64K max outputMiMo-V2.6-Pro: 1MTied128K max output
Output speedTokens per second, our measurement
Gemini 3.8 Flash: 17047% fastertokens/sMiMo-V2.6-Pro: 116tokens/s
SizeTotal and active parameters
Gemini 3.8 Flash: Not disclosedMiMo-V2.6-Pro: 1.02T42B active
Developer
GoogleXiaomi
Released
2 Sep 202621 Sep 2026
Origin
United StatesChina
Input → output
Text, image, video, audio, PDF → textText, 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 sourceGemini 3.8 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.

Gemini 3.8 Flash 45.4/100Rank 20/47

Survived 1 of 3
Foresight: complete playing field
Level 311 ptsTurn 17 / 20

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

LevelGemini 3.8 FlashMiMo-V2.6-Pro
Level 1Second Thoughts
4 ptsOut of lives
4 ptsOut of lives
Level 2Pressure Pot
10 ptsSurvived
9 ptsOut of lives
Level 3Hide or Flight
11 ptsOut of lives
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.

Gemini 3.8 Flash 72.9/100Rank 14/48

Cleared 5 of 5
Latch: complete playing field
Level 520.6 ptsTurn 27 / 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

LevelGemini 3.8 FlashMiMo-V2.6-Pro
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9 ptsClearedFinished early · 1 beacon left
Level 3Relay vault
18.8 ptsCleared
17.2 ptsClearedFinished early · 1 beacon left
Level 4Passing bay
17.8 ptsClearedFinished early · 1 beacon left
16 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.6 ptsCleared
20.4 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Gemini 3.8 Flash

Crimson is carried well down the camera-facing surface, supporting its earlier interaction. The depiction remains highly simplified, with imperfect material rendering. Isolated wall and floor images and a few highlights provide scant reflective evidence; displaced first reflections, missing receding chains and absent nested sphere and emitter imagery leave the room's optical structure largely unsupported.

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

CategoryGemini 3.8 FlashMiMo-V2.6-Pro
State at 600 ms22.5/2523.0/25
Camera and placement11.0/1512.0/15
Reflections4.5/12019.0/120
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

Gemini 3.8 Flash

The dominant four-point silhouette, luminous color progression, raised brows and enormous grin closely fulfill the brief. Attached, secondary limbs support the exuberant expression. Clean facial drawing and glossy eyes give strong character, while shallow depth, minimally articulated extremities and visible steps in the outer glow limit refinement.

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

CategoryGemini 3.8 FlashMiMo-V2.6-Pro
Task & likeness8.0/106.5/10
Anatomy & construction6.0/105.0/10
Space & placement6.5/105.5/10
Light & reflections7.0/106.5/10
Purposeful detail5.0/106.5/10
Artistry & character3.5/105.0/10
Materials & effects5.0/106.5/10
Visual integrity6.5/106.0/10

Benchmark task

Gemini 3.8 Flash

A luminous star-shaped creature tests expressive features, a clear silhouette and smooth colour transitions.

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

Gemini 3.8 Flash

The dark clothing, overlapping hands and hazy landscape make the Mona Lisa reference recognizable. Replication is limited by the frontal, elongated face, heavy mouth and chin, and poorly resolved hands, wrists and forearm. Soft shading gives some volume, but muddy transitions, blunt landscape shapes and rigid facial modeling weaken the portrait’s expression and painterly character.

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

CategoryGemini 3.8 FlashMiMo-V2.6-Pro
Task & likeness3.0/103.5/10
Anatomy & construction2.0/103.5/10
Space & placement3.5/104.0/10
Light & reflections3.0/105.0/10
Purposeful detail5.0/103.0/10
Artistry & character3.0/104.0/10
Materials & effects5.0/104.0/10
Visual integrity1.0/106.0/10

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

Gemini 3.8 Flash

A vivid purple-and-gold sunset anchors an appealing beach composition with dolphins, birds, a turtle and playful accessories. Palm silhouettes frame the bright reflection effectively. Sparse animal anatomy, wirelike palm foliage, conspicuously regular reflection bands and limited surface texture keep the execution below exceptional.

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

CategoryGemini 3.8 FlashMiMo-V2.6-Pro
Task & likeness9.0/108.5/10
Anatomy & construction7.0/105.0/10
Space & placement7.0/106.0/10
Light & reflections8.0/106.5/10
Purposeful detail7.0/106.5/10
Artistry & character7.0/105.0/10
Materials & effects7.0/106.0/10
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

Gemini 3.8 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

Gemini 3.8 Flash

Expressive animals, a bold diagonal hull and sweeping spray create an appealing action scene. The raccoon's support on the dog's back is unclear, and the dog lacks a readable paw-to-control grip and connected steering assembly. Clean graphic shapes and lively accessories are stronger than the anatomical construction. Sunset illumination and reflections remain largely 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

CategoryGemini 3.8 FlashMiMo-V2.6-Pro
Task & likeness7.0/107.0/10
Anatomy & construction6.0/105.0/10
Space & placement7.0/105.5/10
Light & reflections6.5/105.5/10
Purposeful detail7.5/106.0/10
Artistry & character7.5/104.0/10
Materials & effects7.5/105.5/10
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

Gemini 3.8 Flash

The pelican’s enormous bill, lively feathers and orange bicycle create a clear, appealing composition. Basket contents, spokes and facial details reward inspection. Both legs connect to the body, but foot-to-pedal placement and wing-to-handlebar contact are ambiguous. Bicycle mechanics and lighting remain schematic, limiting an otherwise polished illustration.

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

CategoryGemini 3.8 FlashMiMo-V2.6-Pro
Task & likeness9.0/106.5/10
Anatomy & construction7.5/105.0/10
Space & placement7.5/106.0/10
Light & reflections7.0/105.5/10
Purposeful detail8.5/106.0/10
Artistry & character8.0/106.0/10
Materials & effects7.0/105.5/10
Visual integrity8.0/106.0/10

Benchmark task

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