GPT-6.1 Terra 62.0/100Rank 9/50

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Terra leads Qwen3.8-Flash by 13.8 points on StealthMark, 60.4 to 46.6. It leads on 5 of 9 benchmarks, including both games, and Qwen3.8-Flash on 4. GPT-6.1 Terra scores higher on Newton's Mirror, with its largest category advantage in reflections.
See the difference ↘On every task, result quality and reasoning tokens are each compared with all measured models and weighed equally. Each dot is one model.
BENCHMARK BY BENCHMARK
DATASHEET
GPT-6.1 Terra scores higher on StealthMark. Qwen3.8-Flash is 13× cheaper per output token. Both take about 1.05M tokens of context.
Full datasheets, every price and sourceGPT-6.1 Terra ↗Qwen3.8-Flash ↗
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.


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.


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


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.
Qwen3.8-Flash
The full-frame illustration supports a central steel sphere, an airborne black blob and the relative ordering of cyan and crimson. Its faint floor return and symmetric repetitions provide sparse mirror structure; outer chains, large reflected images, nested imagery and emitter mapping remain deficient. Vertical framing is substantially displaced, and paint contact histories remain unresolved.
| Category | GPT-6.1 Terra | Qwen3.8-Flash |
|---|---|---|
| State at 600 ms | 23.0/25 | 19.0/25 |
| Camera and placement | 11.0/15 | 3.5/15 |
| Reflections | 33.0/120 | 9.5/120 |
| Materials and scale | 7.5/10 | 4.0/10 |
| Floor-damage reward | 0.0/10 | 0.0/10 |
A spinning metal sphere and paint in a mirrored room test physical reasoning, perspective and consistency across repeated reflections.
Visual construction and creative interpretation.


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.
Qwen3.8-Flash
A coherent, appealing fantasy illustration with disciplined framing, luminous teal accents and consistent ornament. Most requested elements are clearly present. The bear-like facial proportions, lowered resting hand, obscured bent-leg construction and limited fabric modeling constrain likeness and anatomical clarity; glow effects are attractive but weakly integrated with surrounding surfaces.
| Category | GPT-6.1 Terra | Qwen3.8-Flash |
|---|---|---|
| Task & likeness | 7.5/10 | 8.0/10 |
| Anatomy & construction | 6.5/10 | 7.0/10 |
| Space & placement | 6.5/10 | 8.0/10 |
| Light & reflections | 6.0/10 | 7.5/10 |
| Purposeful detail | 6.5/10 | 8.0/10 |
| Artistry & character | 6.5/10 | 7.5/10 |
| Materials & effects | 6.0/10 | 7.5/10 |
| Visual integrity | 6.0/10 | 8.5/10 |
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.
Qwen3.8-Flash
A floating capybara in ornate robes tests character anatomy, layered fabric and the placement of surrounding luminous forms.
Precise visual recall and portrait reconstruction.


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.
Qwen3.8-Flash
The dark dress, crossed hands and hazy landscape evoke the Mona Lisa, but replication is limited by a generic frontal face, coarse smile and poorly articulated fingers. The gold frame has clearer definition than the portrait. Heavy mottling obscures features, while soft shading provides some volume without convincing anatomical detail.
| Category | GPT-6.1 Terra | Qwen3.8-Flash |
|---|---|---|
| Task & likeness | 5.5/10 | 5.0/10 |
| Anatomy & construction | 6.5/10 | 4.5/10 |
| Space & placement | 4.5/10 | 5.5/10 |
| Light & reflections | 6.5/10 | 5.5/10 |
| Purposeful detail | 6.0/10 | 5.5/10 |
| Artistry & character | 6.0/10 | 5.5/10 |
| Materials & effects | 6.0/10 | 5.5/10 |
| Visual integrity | 6.5/10 | 5.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


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.
Qwen3.8-Flash
Sweeping palms, coordinated sunset colors and a central reflection create an expressive beach composition with clear depth. Birds, animals and varied activities thoroughly realize the brief. Small figures and animal anatomy remain rudimentary, water movement is schematic, and contact shadows are weak. Scattered foreground details and the clipped orange disk limit the finish.
| Category | GPT-6.1 Terra | Qwen3.8-Flash |
|---|---|---|
| Task & likeness | 8.5/10 | 9.0/10 |
| Anatomy & construction | 7.5/10 | 7.0/10 |
| Space & placement | 6.5/10 | 8.0/10 |
| Light & reflections | 5.5/10 | 7.5/10 |
| Purposeful detail | 7.5/10 | 8.5/10 |
| Artistry & character | 7.0/10 | 8.0/10 |
| Materials & effects | 6.5/10 | 6.5/10 |
| Visual integrity | 7.5/10 | 7.0/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


GPT-6.1 Terra
This benchmark has not been assessed yet.
Qwen3.8-Flash
This benchmark has not been assessed yet.
A plank, computer mouse and blueberry in a steel room test physical stability, spatial relationships, materials and lighting.
Scene composition and interacting subjects.


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.
Qwen3.8-Flash
The raccoon clearly rides the dog's back, with expressive features and appealing blue-orange color contrast. The dog's paws do not clearly operate connected controls, and the shallow vehicle lacks convincing jet ski construction. Clean outlines support the cartoon style, but generic shading and blurred water streaks limit depth and motion.
| Category | GPT-6.1 Terra | Qwen3.8-Flash |
|---|---|---|
| Task & likeness | 6.5/10 | 7.0/10 |
| Anatomy & construction | 5.5/10 | 5.5/10 |
| Space & placement | 6.0/10 | 6.5/10 |
| Light & reflections | 5.0/10 | 5.5/10 |
| Purposeful detail | 7.0/10 | 7.0/10 |
| Artistry & character | 6.0/10 | 6.5/10 |
| Materials & effects | 6.0/10 | 5.5/10 |
| Visual integrity | 7.0/10 | 7.0/10 |
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.
Subject construction and spatial relationships.


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.
Qwen3.8-Flash
The pelican's expressive face, oversized bill and flowing scarf create an appealing focal point. The bicycle has recognizable frame, chain and wheel construction, but the far foot lacks a clear pedal connection and the wing's steering contact is ambiguous. Clean contours and gentle gradients support the illustration; simplified volume and weak directional shadows limit depth.
| Category | GPT-6.1 Terra | Qwen3.8-Flash |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 7.0/10 | 8.0/10 |
| Space & placement | 6.0/10 | 7.5/10 |
| Light & reflections | 5.5/10 | 6.5/10 |
| Purposeful detail | 7.0/10 | 8.0/10 |
| Artistry & character | 6.5/10 | 8.0/10 |
| Materials & effects | 5.5/10 | 7.0/10 |
| Visual integrity | 6.0/10 | 7.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.