STEALTHMARK · HEAD TO HEAD

All comparisons ↗

DeepSeek-V4-Pro-0813 vs GPT-6.1 Terra

GPT-6.1 Terra leads DeepSeek-V4-Pro-0813 by 18.6 points on StealthMark, 60.4 to 41.8. It leads on all 9 benchmarks. GPT-6.1 Terra scores higher on Beach, with its largest category advantage in anatomy & construction.

See the difference ↘
All results ↗
All results ↗

Overall StealthMark

41.8/100Overall rank 34/54
60.4/100Overall rank 9/54

General Intelligence

41.6/100
58.0/100

Visual Intelligence

42.3/100
64.9/100

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

  • DeepSeek-V4-Pro-0813
  • GPT-6.1 Terra
  • Other models
  • Median

DATASHEET

Specs and pricing

DeepSeek-V4-Pro-0813 is 31% cheaper per output token. GPT-6.1 Terra scores higher on StealthMark. Both take about 1M tokens of context.

  • DeepSeek-V4-Pro-0813
  • GPT-6.1 Terra
  • Other models
  • Median
PricePer 1M output tokens, input below
DeepSeek-V4-Pro-0813: $3.8231% cheaper$1.27 inputGPT-6.1 Terra: $5$1 input
Context windowTokens per request, max output below
DeepSeek-V4-Pro-0813: 1MTied384K max outputGPT-6.1 Terra: 1.05MTied128K max output
Output speedTokens per second, our measurement
DeepSeek-V4-Pro-0813: 137tokens/sGPT-6.1 Terra: Not measured
SizeTotal and active parameters
DeepSeek-V4-Pro-0813: 1.6T49B activeGPT-6.1 Terra: Not disclosed
Developer
DeepSeek-AIOpenAI
Released
13 Aug 202626 Oct 2026
Origin
ChinaUnited States
Input → output
Text → textText, image → text
Architecture
Mixture-of-Experts with DeepSeek V4 architecture and DSpark speculative-decoding moduleNot published

Full datasheets, every price and sourceDeepSeek-V4-Pro-0813 ↗GPT-6.1 Terra ↗

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.

DeepSeek-V4-Pro-0813 42.7/100Rank 23/50

Survived 1 of 3
Foresight: complete playing field
Level 39 ptsTurn 20 / 20

GPT-6.1 Terra 62.0/100Rank 9/50

Survived 2 of 3
Foresight: complete playing field
Level 315 ptsTurn 20 / 20

Points per level

LevelDeepSeek-V4-Pro-0813GPT-6.1 Terra
Level 1Second Thoughts
14 ptsOut of lives
21 ptsSurvived
Level 2Pressure Pot
6 ptsOut of lives
9 ptsOut of lives
Level 3Hide or Flight
9 ptsSurvived
15 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.

DeepSeek-V4-Pro-0813 71.7/100Rank 17/51

Cleared 5 of 5
Latch: complete playing field
Level 520.6 ptsTurn 27 / 40

GPT-6.1 Terra 77.7/100Rank 12/51

Cleared 5 of 5
Latch: complete playing field
Level 520.6 ptsTurn 27 / 40

Points per level

LevelDeepSeek-V4-Pro-0813GPT-6.1 Terra
Level 1Hold the door
5.2 ptsCleared
5.2 ptsCleared
Level 2Crossfeed
9.8 ptsCleared
9.8 ptsCleared
Level 3Relay vault
18.8 ptsCleared
19.2 ptsCleared
Level 4Passing bay
17.2 ptsClearedFinished early · 1 beacon left
17.8 ptsClearedFinished early · 3 beacons left
Level 5Second thoughts
20.6 ptsCleared
20.6 ptsCleared

Newton's Mirror

Same task instructions

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

The judgment

DeepSeek-V4-Pro-0813

The central sphere and gross paint state are coherent. Reduced circular side images and paired overhead quadrilaterals offer limited, spatially organized reflection cues, but the floor-sphere image, receding mirror-room structure, outer chains, nested imagery and curved emitter mappings are largely missing or invalid.

GPT-6.1 Terra

The sphere, airborne black and first reflected silhouettes preserve important geometry within the portrait frame. Paint deformation, contact order and forward transport are supported, with a small crimson endpoint overshoot. Major optical omissions dominate: short finite reflection sequences and smooth bands replace extensive, spatially ordered mirror imagery. Dark gloss and crisp upper emitter shapes provide partial material credit.

Score breakdown

CategoryDeepSeek-V4-Pro-0813GPT-6.1 Terra
State at 600 ms22.0/2523.0/25
Camera and placement15.0/1511.0/15
Reflections11.0/12033.0/120
Materials and scale8.0/107.5/10
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

DeepSeek-V4-Pro-0813

The whale’s warm eye, lavender assistant and tilted shell convey appealing character. However, the shrimp and reciprocal inspection are unresolved, the large bubble and upper tail are cropped, and the flipper’s grip is unclear. Broad competing color fields and conspicuous stepped edges weaken the flowing composition. Gradients suggest volume, but lighting and translucent materials remain uneven.

GPT-6.1 Terra

A balanced serpent emblem with six attached outward heads, delicate scales and softly rounded bodies. Its compact silhouette reads clearly, but central routing does not establish every alternating crossing or crisp inward corner. Repetitive texture, limited facial anatomy and weak contact shadows constrain its organic character.

Score breakdown

CategoryDeepSeek-V4-Pro-0813GPT-6.1 Terra
Task & likeness3.0/107.5/10
Anatomy & construction5.0/106.5/10
Space & placement4.0/106.5/10
Light & reflections5.5/106.0/10
Purposeful detail5.5/106.5/10
Artistry & character2.5/106.5/10
Materials & effects5.0/106.0/10
Visual integrity3.0/106.0/10

Benchmark task

DeepSeek-V4-Pro-0813

A whale and a tiny shrimp examine one another through bubble lenses, with an octopus nearby. The scene tests interacting characters, differences in scale and transparent materials.

GPT-6.1 Terra

A pale serpent woven into an interlocking knot tests connected anatomy, repeated structure and readable overlaps. Organic surface detail must work with the overall geometry.

Mona Lisa

Different task instructions

Precise visual recall and portrait reconstruction.

The judgment

DeepSeek-V4-Pro-0813

Dark hair, a restrained smile and a hazy landscape make the reference recognizable. Severe construction problems dominate: oversized looping sleeves surround a background-colored opening, and the crossed hands lack coherent wrist and forearm connections. Rigid symmetry and elongated facial proportions weaken expression. Soft skin gradients and clean contours provide limited finish.

GPT-6.1 Terra

A recognizable interpretation with developed facial shading, shaped sleeve folds and purposeful small features. These strengths support modest upward calibration, while the frontal torso, elongated proportions, schematic finger joints and unresolved seated support keep replication and construction uneven.

Score breakdown

CategoryDeepSeek-V4-Pro-0813GPT-6.1 Terra
Task & likeness2.0/105.5/10
Anatomy & construction0.5/106.5/10
Space & placement2.0/104.5/10
Light & reflections2.0/106.5/10
Purposeful detail2.0/106.0/10
Artistry & character3.0/106.0/10
Materials & effects1.5/106.0/10
Visual integrity1.0/106.5/10

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

DeepSeek-V4-Pro-0813

The glowing sunset, framing palms and layered shoreline create a coherent beach scene with animals, birds and playful accessories. The airborne blue animal has unclear anatomy, while flat foliage, weak ground contact and broad oval reflections limit depth and finish. The image is appealing but visibly simplified.

GPT-6.1 Terra

A coherent sunset illustration with clear prompt fulfillment, controlled framing and varied, purposeful small details. Simplified joints, frontal staging, flattened animal forms and weakly directional shadows limit its anatomical, spatial and physical sophistication.

Score breakdown

CategoryDeepSeek-V4-Pro-0813GPT-6.1 Terra
Task & likeness6.5/108.5/10
Anatomy & construction4.0/107.5/10
Space & placement5.5/106.5/10
Light & reflections6.0/105.5/10
Purposeful detail3.5/107.5/10
Artistry & character4.0/107.0/10
Materials & effects6.0/106.5/10
Visual integrity5.0/107.5/10

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

DeepSeek-V4-Pro-0813

This benchmark has not been assessed yet.

GPT-6.1 Terra

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

DeepSeek-V4-Pro-0813

The masked raccoon riding the steering dog is readily recognizable, with expressive faces and energetic diagonal movement. The oversized tail dominates the composition, limb connections are difficult to trace, and the jet ski has little structural depth. Blurred spray and a heavy oval shadow weaken water contact, while the glowing sun produces little corresponding illumination.

GPT-6.1 Terra

A coherent cartoon with expressive animals, readable steering and a clear wake. Fine facial and hull details reward inspection. The main limits are the boatlike craft, simplified joints, weakly braced frontal raccoon and minimal directional lighting or material depth.

Score breakdown

CategoryDeepSeek-V4-Pro-0813GPT-6.1 Terra
Task & likeness7.0/106.5/10
Anatomy & construction4.5/105.5/10
Space & placement6.0/106.0/10
Light & reflections4.5/105.0/10
Purposeful detail6.0/107.0/10
Artistry & character4.5/106.0/10
Materials & effects5.0/106.0/10
Visual integrity4.0/107.0/10

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

Same task instructions

Subject construction and spatial relationships.

The judgment

DeepSeek-V4-Pro-0813

A clearly recognizable pelican cycles through a balanced, expressive illustration. The sweeping bill, shaded plumage and carefully drawn wheels give it character. Mechanical construction is weaker: the chain loop sits below the crank, and foot-to-pedal and wing-to-handlebar contact are ambiguous. Smooth gradients provide volume, but the scene remains visibly stylized.

GPT-6.1 Terra

A coherent pelican cyclist with expressive proportions, purposeful feather detail and developed bicycle machinery. Continuous body contours, aligned wheels and readable pedal contacts support the scene. Simplified articulation, shallow modelling and an unresolved steering connection limit construction and placement.

Score breakdown

CategoryDeepSeek-V4-Pro-0813GPT-6.1 Terra
Task & likeness8.0/107.0/10
Anatomy & construction5.0/107.0/10
Space & placement6.5/106.0/10
Light & reflections7.0/105.5/10
Purposeful detail7.0/107.0/10
Artistry & character5.5/106.5/10
Materials & effects7.0/105.5/10
Visual integrity5.0/106.0/10

Benchmark task

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