Beam 1.0 501B A23B 49.4/100Rank 19/50

STEALTHMARK · HEAD TO HEAD
All comparisons ↗GPT-6.1 Terra leads Beam 1.0 501B A23B by 28.5 points on StealthMark, 60.4 to 31.9. 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
Beam 1.0 501B A23B is 5× cheaper per output token. GPT-6.1 Terra scores higher on StealthMark. Both take about 1M tokens of context.
Full datasheets, every price and sourceBeam 1.0 501B A23B ↗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.


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 ↗


Beam 1.0 501B A23B
Central object placement is fairly close, but the defining mirrored-room structure is missing. The paint colors suggest the required contact order without establishing their different interaction histories. The faint floor oval does not demonstrate valid reflection geometry, so it earns no reflection credit. Rounded volume and glossy paint provide limited material credit despite weak metallic finishes and oversized paint bodies.
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.
| Category | Beam 1.0 501B A23B | GPT-6.1 Terra |
|---|---|---|
| State at 600 ms | 20.5/25 | 23.0/25 |
| Camera and placement | 11.5/15 | 11.0/15 |
| Reflections | 2.0/120 | 33.0/120 |
| Materials and scale | 3.0/10 | 7.5/10 |
| 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.


Beam 1.0 501B A23B
An appealing expression and warm palette support a coherent simple cartoon. The central polishing joke is not legible: the cloth is unresolved and the nose sits away from the fan. Pointed radial plates, uncertain limb attachments and weak ground contact limit construction, while restrained surface detail limits material richness.
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.
| Category | Beam 1.0 501B A23B | GPT-6.1 Terra |
|---|---|---|
| Task & likeness | 4.0/10 | 7.5/10 |
| Anatomy & construction | 3.5/10 | 6.5/10 |
| Space & placement | 5.5/10 | 6.5/10 |
| Light & reflections | 5.5/10 | 6.0/10 |
| Purposeful detail | 4.5/10 | 6.5/10 |
| Artistry & character | 4.0/10 | 6.5/10 |
| Materials & effects | 4.5/10 | 6.0/10 |
| Visual integrity | 7.0/10 | 6.0/10 |
Beam 1.0 501B A23B
A golden pangolin polishes its oversized amber tail while its nose smudges the same scale. The scene tests expressive anatomy, physical contact and contrasting translucent, polished and soft 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.
Precise visual recall and portrait reconstruction.


Beam 1.0 501B A23B
The candidate shows a faint warm oval against an almost entirely black field. Minimal placement and smooth tonal variation are visible, but the portrait, anatomy, crossed hands and landscape remain unreadable. The saved comparisons provide no specific evidence supporting a change to the baseline categories.
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.
| Category | Beam 1.0 501B A23B | GPT-6.1 Terra |
|---|---|---|
| Task & likeness | 0.0/10 | 5.5/10 |
| Anatomy & construction | 0.0/10 | 6.5/10 |
| Space & placement | 0.0/10 | 4.5/10 |
| Light & reflections | 0.5/10 | 6.5/10 |
| Purposeful detail | 0.0/10 | 6.0/10 |
| Artistry & character | 0.0/10 | 6.0/10 |
| Materials & effects | 0.0/10 | 6.0/10 |
| Visual integrity | 0.0/10 | 6.5/10 |
An SVG interpretation of the Mona Lisa tests facial likeness, anatomy and the composition of a familiar portrait.
Creativity, perspective and visual beauty.


Beam 1.0 501B A23B
A coherent, cheerful beach illustration fulfills the main subjects with clean shapes and a strong sunset focal point. Its basic geometric construction, ambiguous animal anatomy, shallow depth and schematic lighting limit its accomplishment. Decorative details provide interest without developing intricate forms or convincing physical surfaces.
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.
| Category | Beam 1.0 501B A23B | GPT-6.1 Terra |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 7.5/10 |
| Space & placement | 6.0/10 | 6.5/10 |
| Light & reflections | 5.0/10 | 5.5/10 |
| Purposeful detail | 5.5/10 | 7.5/10 |
| Artistry & character | 4.0/10 | 7.0/10 |
| Materials & effects | 5.0/10 | 6.5/10 |
| Visual integrity | 5.0/10 | 7.5/10 |
A busy shoreline at sunset tests scene composition, animal forms and the relationship between light and water reflections.
Physical reasoning, light and visual reconstruction.


Beam 1.0 501B A23B
This benchmark has not been assessed yet.
GPT-6.1 Terra
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.


Beam 1.0 501B A23B
A cheerful, readable illustration with recognizable animals, expressive faces and useful accessories. Simple rounded construction limits complexity, while ambiguous steering attachments and weak hull-to-water contact reduce physical coherence. Lighting and surface effects establish the setting without convincing environmental interaction.
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.
| Category | Beam 1.0 501B A23B | GPT-6.1 Terra |
|---|---|---|
| Task & likeness | 5.0/10 | 6.5/10 |
| Anatomy & construction | 3.5/10 | 5.5/10 |
| Space & placement | 5.5/10 | 6.0/10 |
| Light & reflections | 4.0/10 | 5.0/10 |
| Purposeful detail | 6.5/10 | 7.0/10 |
| Artistry & character | 3.5/10 | 6.0/10 |
| Materials & effects | 5.0/10 | 6.0/10 |
| Visual integrity | 6.5/10 | 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.


Beam 1.0 501B A23B
A cheerful, clearly readable pelican-and-bicycle illustration with clean contours and balanced composition. Simple geometric construction limits artistic complexity, while ambiguous neck and steering overlaps, merged pedal contacts and an incomplete drivetrain weaken physical coherence.
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.
| Category | Beam 1.0 501B A23B | GPT-6.1 Terra |
|---|---|---|
| Task & likeness | 5.5/10 | 7.0/10 |
| Anatomy & construction | 4.5/10 | 7.0/10 |
| Space & placement | 5.0/10 | 6.0/10 |
| Light & reflections | 4.0/10 | 5.5/10 |
| Purposeful detail | 4.0/10 | 7.0/10 |
| Artistry & character | 4.0/10 | 6.5/10 |
| Materials & effects | 4.0/10 | 5.5/10 |
| Visual integrity | 5.5/10 | 6.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.