STEALTHMARK · HEAD TO HEAD

All comparisons ↗

Kimi K3.1 Pro vs Mistral Large 4

Kimi K3.1 Pro leads Mistral Large 4 by 13.4 points on StealthMark, 56.7 to 43.3. It leads on 6 of 9 benchmarks, including both games, and Mistral Large 4 on 3. Kimi K3.1 Pro scores higher on Newton's Mirror, with its largest category advantage in reflections.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

56.7/100Overall rank 11/53
43.3/100Overall rank 31/53

General Intelligence

53.9/100
34.4/100

Visual Intelligence

62.0/100
58.0/100

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

BENCHMARK BY BENCHMARK

Where each model leads

  • Kimi K3.1 Pro
  • Mistral Large 4
  • Other models
  • Median

DATASHEET

Specs and pricing

Kimi K3.1 Pro scores higher on StealthMark. Mistral Large 4 is 2.4× cheaper per output token and runs 29% faster in our speed test. Both take about 1M tokens of context.

  • Kimi K3.1 Pro
  • Mistral Large 4
  • Other models
  • Median
PricePer 1M output tokens, input below
Kimi K3.1 Pro: $10$2 inputMistral Large 4: $4.182.4× cheaper$1.36 input
Context windowTokens per request, max output below
Kimi K3.1 Pro: 1MTied1M max outputMistral Large 4: 1MTied256K max output
Output speedTokens per second, our measurement
Kimi K3.1 Pro: 117tokens/sMistral Large 4: 15129% fastertokens/s
SizeTotal and active parameters
Kimi K3.1 Pro: 2.8T104B activeEstimatedMistral Large 4: 1.05T49B active
Developer
Moonshot AIMistral AI
Released
23 Oct 20266 Oct 2026
Origin
ChinaFrance
Input → output
Text, image, video → textText, image → text
Architecture
Post-trained version of Kimi K3, a Mixture-of-Experts modelGranular mixture of experts (MoE); multimodal text and image input, text output.

Full datasheets, every price and sourceKimi K3.1 Pro ↗Mistral Large 4 ↗

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.

Kimi K3.1 Pro 61.1/100Rank 10/47

Survived 1 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Mistral Large 4 22.0/100Rank 39/47

Survived 0 of 3
Foresight: complete playing field
Level 34 ptsTurn 8 / 20

Points per level

LevelKimi K3.1 ProMistral Large 4
Level 1Second Thoughts
15 ptsOut of lives
1 ptsOut of lives
Level 2Pressure Pot
12 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
15 ptsSurvived
4 ptsOut of lives

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.

Kimi K3.1 Pro 81.8/100Rank 8/48

Cleared 5 of 5
Latch: complete playing field
Level 519.8 ptsTurn 31 / 40

Mistral Large 4 49.4/100Rank 23/48

Cleared 5 of 5
Latch: complete playing field
Level 519.8 ptsTurn 31 / 40

Points per level

LevelKimi K3.1 ProMistral Large 4
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.6 ptsCleared
Level 3Relay vault
19.2 ptsCleared
15.8 ptsClearedFinished early · 3 beacons left
Level 4Passing bay
18.2 ptsClearedFinished early · 3 beacons left
16.2 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
19.8 ptsCleared
19.8 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

Kimi K3.1 Pro

The settled sphere, separate airborne black paint and crimson-before-cyan interaction are supported, with a modest crimson travel overshoot. A shared downward framing displacement remains after accounting for the square canvas. The principal limitation is the reflection system: sparse sphere copies and generic curved bands omit most of the ordered mirror-room structure. Materials receive a small upward revision because bounded bright images and dark bands visibly establish some polish, while soft shading and bulky paint remain separate weaknesses.

Mistral Large 4

The central sphere, airborne black and deformed crimson support substantial state and placement credit. Recent cyan contact and crimson transport remain uncertain. Sparse wall patches and glossy gradients provide little evidence of the required extensive mirror system, while the missing centerline lamp and bulky crimson remain visible weaknesses.

Score breakdown

CategoryKimi K3.1 ProMistral Large 4
State at 600 ms23.5/2517.0/25
Camera and placement10.5/1511.0/15
Reflections26.0/12012.0/120
Materials and scale7.0/105.5/10
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

Kimi K3.1 Pro

The transformed reflection, attentive pose and constellation anatomy clearly communicate introspection. Purposeful fine details enrich a coherent composition. Tubular limbs, crowded lower-body overlaps, shallow depth and limited cast lighting keep the overall execution within the competent range.

Mistral Large 4

An appealing, coherent illustration whose enormous rounded cat anchors the windblown composition. Warm shading and floating sketches communicate the brief well. Simplified paws, faint ear construction, inconsistent wind cues and limited material texture keep the execution below exceptional.

Score breakdown

CategoryKimi K3.1 ProMistral Large 4
Task & likeness8.0/108.0/10
Anatomy & construction5.5/107.0/10
Space & placement6.5/107.5/10
Light & reflections6.5/107.0/10
Purposeful detail7.5/107.0/10
Artistry & character7.0/107.0/10
Materials & effects7.0/107.0/10
Visual integrity7.0/108.0/10

Benchmark task

Kimi K3.1 Pro

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.

Mistral Large 4

A heavy ginger cat stays planted on a terrace as wind carries papers around it. The scene tests weight, expression and the contrast between stable and moving forms.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

Kimi K3.1 Pro

A coherent, recognizable interpretation with controlled color and readable landscape layers. Replication is limited by the frontal seated construction, elongated facial proportions and oversized, weakly articulated hands. Smooth shading supplies some volume but little of the reference's subtle expression, fabric structure or atmospheric transitions.

Mistral Large 4

A recognizable, cleanly rendered interpretation with a restrained palette and some facial modeling. Its enlarged frontal head, simplified expression, compressed low hands and schematic landscape substantially limit likeness and construction. The smooth rendering does not reproduce the painting's nuanced anatomy, clothing or atmospheric depth.

Score breakdown

CategoryKimi K3.1 ProMistral Large 4
Task & likeness5.0/104.0/10
Anatomy & construction5.0/103.5/10
Space & placement5.5/105.0/10
Light & reflections6.0/104.5/10
Purposeful detail5.5/104.0/10
Artistry & character6.0/104.0/10
Materials & effects5.0/104.5/10
Visual integrity6.5/105.5/10

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

Kimi K3.1 Pro

A coherent, playful beach illustration with readable animals, an organized composition and an aligned sunset reflection. Connected silhouettes, sand texture and atmospheric effects demonstrate controlled execution. Simplified joints, flattened foreground viewpoints and inconsistent shadows limit anatomical and spatial credibility.

Mistral Large 4

A clean, appealing beach illustration with clear subject coverage, a cohesive sunset palette and expressive animal details. Bodies and accessories resolve basic construction coherently, although joints remain schematic. Layered shapes establish modest depth; generic oval shadows and flat surfaces limit physical richness. Repeated forms and sparse articulation leave room for more accomplished drawing.

Score breakdown

CategoryKimi K3.1 ProMistral Large 4
Task & likeness8.5/107.5/10
Anatomy & construction5.5/106.0/10
Space & placement5.5/107.0/10
Light & reflections6.5/106.5/10
Purposeful detail6.5/106.0/10
Artistry & character5.5/106.0/10
Materials & effects6.5/106.5/10
Visual integrity7.5/108.0/10

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

Kimi K3.1 Pro

This benchmark has not been assessed yet.

Mistral Large 4

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

Kimi K3.1 Pro

The additional comparisons support retaining the assessment. Readable steering, shaped animal contours and purposeful details coexist with simplified joints, a frontal passenger whose seated weight is weakly conveyed, and limited physical lighting. The angled craft establishes more depth than the riding pose resolves.

Mistral Large 4

The central interaction is clear, with recognizable animals, expressive faces and a coherent sunset composition. Clean contours and readable accessories give the cartoon polish. Simplified joints, uncertain steering attachment, shallow hull volume and limited directional lighting constrain its physical resolution.

Score breakdown

CategoryKimi K3.1 ProMistral Large 4
Task & likeness7.0/108.5/10
Anatomy & construction5.5/106.5/10
Space & placement6.0/107.0/10
Light & reflections5.5/105.5/10
Purposeful detail7.0/107.5/10
Artistry & character6.0/106.5/10
Materials & effects6.0/106.5/10
Visual integrity7.0/108.0/10

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

Kimi K3.1 Pro

A characterful coastal illustration with controlled contours and varied feather, accessory and bicycle detail. Layered scenery and subtle shading enrich the presentation. Soft leg articulation, unresolved riding contacts, shallow depth and generalized lighting limit physical precision.

Mistral Large 4

A coherent, appealing pelican illustration with a continuous body silhouette, readable bicycle and grounded wheels. Simplified legs and ambiguous steering and pedal connections limit construction. Clean shapes and expressive accessories succeed, while shallow depth, modest lighting and sparse material differentiation leave substantial room for refinement.

Score breakdown

CategoryKimi K3.1 ProMistral Large 4
Task & likeness8.5/108.5/10
Anatomy & construction7.5/106.0/10
Space & placement6.5/107.0/10
Light & reflections6.5/106.5/10
Purposeful detail7.5/107.0/10
Artistry & character7.5/107.0/10
Materials & effects6.5/106.5/10
Visual integrity7.5/108.0/10

Benchmark task

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