GPT-6.1 Terra 62.0/100Rank 9/50

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Terra leads Qwen3.5-9B by 49.5 points on StealthMark, 60.4 to 10.9. It leads on all 9 benchmarks. 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. Qwen3.5-9B is 20× cheaper per output token. Both take about 1.05M tokens of context.
Full datasheets, every price and sourceGPT-6.1 Terra ↗Qwen3.5-9B ↗
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.
Qwen3.5-9B
Horizontal centering and a separate airborne black blob are visible. Cyan's recent contact and crimson's forward transport are insufficiently demonstrated, while sphere support remains obscured. The enlarged, lowered sphere substantially changes the composition. The wall and floor sphere images, recursive room structure and curved emitter mappings are almost entirely missing.
| Category | GPT-6.1 Terra | Qwen3.5-9B |
|---|---|---|
| State at 600 ms | 23.0/25 | 3.0/25 |
| Camera and placement | 11.0/15 | 4.5/15 |
| Reflections | 33.0/120 | 2.0/120 |
| Materials and scale | 7.5/10 | 3.0/10 |
| 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.
Qwen3.5-9B
Glowing teal spheres and a harmonious palette provide visible strengths, but the central character remains seriously unresolved. A large gap separates head and torso, limbs cannot be traced, and scattered garment shapes fail to establish the ornate costume. The foreground mound replaces the tall enclosing arch. Clean primitive edges do not repair these construction failures.
| Category | GPT-6.1 Terra | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 7.5/10 | 3.0/10 |
| Anatomy & construction | 6.5/10 | 2.0/10 |
| Space & placement | 6.5/10 | 3.0/10 |
| Light & reflections | 6.0/10 | 3.5/10 |
| Purposeful detail | 6.5/10 | 2.0/10 |
| Artistry & character | 6.5/10 | 2.0/10 |
| Materials & effects | 6.0/10 | 4.0/10 |
| Visual integrity | 6.0/10 | 3.0/10 |
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.
Qwen3.5-9B
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.
Qwen3.5-9B
A centered dark oval with sparse facial marks forms a simple graphic face, but scarcely replicates the Mona Lisa. The portrait's body, crossed hands, clothing and landscape are missing, while angular facial construction and flat tones lose its likeness, volume and subtle expression.
| Category | GPT-6.1 Terra | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 5.5/10 | 0.0/10 |
| Anatomy & construction | 6.5/10 | 0.5/10 |
| Space & placement | 4.5/10 | 0.0/10 |
| Light & reflections | 6.5/10 | 0.0/10 |
| Purposeful detail | 6.0/10 | 0.5/10 |
| Artistry & character | 6.0/10 | 1.0/10 |
| Materials & effects | 6.0/10 | 0.0/10 |
| Visual integrity | 6.5/10 | 0.5/10 |
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.
Qwen3.5-9B
The beach is recognizable, and sweeping shoreline curves provide basic rhythm. Wildlife and playful activity remain poorly resolved, with ambiguous body construction and object contact. The sun glows without corresponding reflections or surface lighting. Fragmented subjects and an unintegrated rectangular panel substantially weaken composition and finish.
| Category | GPT-6.1 Terra | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 8.5/10 | 1.5/10 |
| Anatomy & construction | 7.5/10 | 0.5/10 |
| Space & placement | 6.5/10 | 1.5/10 |
| Light & reflections | 5.5/10 | 1.0/10 |
| Purposeful detail | 7.5/10 | 2.5/10 |
| Artistry & character | 7.0/10 | 1.5/10 |
| Materials & effects | 6.5/10 | 0.5/10 |
| Visual integrity | 7.5/10 | 1.5/10 |
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.
Qwen3.5-9B
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.
Qwen3.5-9B
Bright colors, clean individual shapes and basic animal cues make the scene partly recognizable. Back seating, body continuity, steering and jet ski construction remain unresolved. Background gradients and wave rhythm provide some finish, but substantial anatomical, spatial and interaction weaknesses dominate.
| Category | GPT-6.1 Terra | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 6.5/10 | 2.5/10 |
| Anatomy & construction | 5.5/10 | 1.0/10 |
| Space & placement | 6.0/10 | 2.0/10 |
| Light & reflections | 5.0/10 | 1.0/10 |
| Purposeful detail | 7.0/10 | 1.5/10 |
| Artistry & character | 6.0/10 | 1.0/10 |
| Materials & effects | 6.0/10 | 1.0/10 |
| Visual integrity | 7.0/10 | 2.5/10 |
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.
Qwen3.5-9B
The oversized bill and orderly spoked wheels make the subject partly recognizable. Clean contours and strong color contrast provide graphic clarity, but unresolved appendages, steering, drivetrain and support dominate the construction. Sparse shading and detail further limit the illustration.
| Category | GPT-6.1 Terra | Qwen3.5-9B |
|---|---|---|
| Task & likeness | 7.0/10 | 4.0/10 |
| Anatomy & construction | 7.0/10 | 1.5/10 |
| Space & placement | 6.0/10 | 3.0/10 |
| Light & reflections | 5.5/10 | 1.5/10 |
| Purposeful detail | 7.0/10 | 2.5/10 |
| Artistry & character | 6.5/10 | 1.5/10 |
| Materials & effects | 5.5/10 | 1.5/10 |
| Visual integrity | 6.0/10 | 2.5/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.