Beam 1.0 501B A23B 49.4/100Rank 18/47

STEALTHMARK · HEAD TO HEAD
All comparisons ↗Claude Haiku 5.5 leads Beam 1.0 501B A23B by 17.6 points on StealthMark, 49.5 to 31.9. It leads on 7 of 9 benchmarks, including Latch, and Beam 1.0 501B A23B on 2, including Foresight. Claude Haiku 5.5 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 runs 2.4× faster in our speed test. Claude Haiku 5.5 scores higher on StealthMark and is 2× cheaper per output token. Both take about 1M tokens of context.
Full datasheets, every price and sourceBeam 1.0 501B A23B ↗Claude Haiku 5.5 ↗
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.
Claude Haiku 5.5
The centered sphere, compact airborne black blob and differentiated cyan/crimson interaction support substantial state and placement credit. The few recognizable sphere and panel images establish limited optical relationships, but most of the required mirror system is missing. Rounded volume and localized paint warrant substantial material credit despite the soft, illustrative finish.
| Category | Beam 1.0 501B A23B | Claude Haiku 5.5 |
|---|---|---|
| State at 600 ms | 20.5/25 | 25.0/25 |
| Camera and placement | 11.5/15 | 8.0/15 |
| Reflections | 2.0/120 | 24.5/120 |
| 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.
Claude Haiku 5.5
A coherent coral squid emblem with a compact mantle, restrained face and clean centered presentation. Its radial silhouette and floating placement work, but sharp arm tips, crowded roots and sparse surface modeling limit softness, construction and finish.
| Category | Beam 1.0 501B A23B | Claude Haiku 5.5 |
|---|---|---|
| Task & likeness | 4.0/10 | 6.5/10 |
| Anatomy & construction | 3.5/10 | 4.0/10 |
| Space & placement | 5.5/10 | 6.5/10 |
| Light & reflections | 5.5/10 | 4.0/10 |
| Purposeful detail | 4.5/10 | 3.5/10 |
| Artistry & character | 4.0/10 | 3.5/10 |
| Materials & effects | 4.5/10 | 4.5/10 |
| Visual integrity | 7.0/10 | 7.0/10 |
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.
Claude Haiku 5.5
A coral squid with spreading arms tests connected anatomy, balanced composition and soft surface shading.
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.
Claude Haiku 5.5
A recognizable but basic Mona Lisa reinterpretation. Clean contours and smooth facial lighting provide coherence and volume. Replication remains limited by the frontal pose, elongated neck, schematic expression, unresolved crossed hands and sparse landscape. Lighting is more successful than anatomical construction and purposeful detail.
| Category | Beam 1.0 501B A23B | Claude Haiku 5.5 |
|---|---|---|
| Task & likeness | 0.0/10 | 3.0/10 |
| Anatomy & construction | 0.0/10 | 4.0/10 |
| Space & placement | 0.0/10 | 4.0/10 |
| Light & reflections | 0.5/10 | 5.5/10 |
| Purposeful detail | 0.0/10 | 2.5/10 |
| Artistry & character | 0.0/10 | 3.5/10 |
| Materials & effects | 0.0/10 | 2.5/10 |
| Visual integrity | 0.0/10 | 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.


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.
Claude Haiku 5.5
A cheerful, coherent beach illustration with attractive sunset colors, readable accessories and clean silhouettes. Its sun and sailboat reflections establish useful physical relationships. Simple animal construction, flattened foreground placement, sparse directional shadows and minimally differentiated surfaces limit its drawing refinement.
| Category | Beam 1.0 501B A23B | Claude Haiku 5.5 |
|---|---|---|
| Task & likeness | 7.0/10 | 8.5/10 |
| Anatomy & construction | 5.0/10 | 6.5/10 |
| Space & placement | 6.0/10 | 7.0/10 |
| Light & reflections | 5.0/10 | 7.0/10 |
| Purposeful detail | 5.5/10 | 7.0/10 |
| Artistry & character | 4.0/10 | 6.0/10 |
| Materials & effects | 5.0/10 | 6.0/10 |
| Visual integrity | 5.0/10 | 8.5/10 |
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.
Claude Haiku 5.5
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.
Claude Haiku 5.5
A tidy, appealing cartoon with recognizable animals and a pleasing sunset palette. Steering lacks visible controls, while schematic limbs and uncertain raccoon support weaken the requested interaction. Shallow vehicle construction, flat character lighting and modest displacement limit physical coherence. Clean shapes and readable identifying details remain strengths.
| Category | Beam 1.0 501B A23B | Claude Haiku 5.5 |
|---|---|---|
| Task & likeness | 5.0/10 | 4.0/10 |
| Anatomy & construction | 3.5/10 | 3.5/10 |
| Space & placement | 5.5/10 | 5.5/10 |
| Light & reflections | 4.0/10 | 4.0/10 |
| Purposeful detail | 6.5/10 | 5.5/10 |
| Artistry & character | 3.5/10 | 4.5/10 |
| Materials & effects | 5.0/10 | 5.5/10 |
| Visual integrity | 6.5/10 | 4.5/10 |
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.


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.
Claude Haiku 5.5
A cheerful, recognizable illustration with clean contours and a balanced warm palette. Aligned wheels and readable frame geometry establish the bicycle, but shoulder construction, feet and steering contact remain imprecise. Sparse drivetrain detail, flat materials and absent grounding shadows limit anatomical and spatial conviction.
| Category | Beam 1.0 501B A23B | Claude Haiku 5.5 |
|---|---|---|
| Task & likeness | 5.5/10 | 8.0/10 |
| Anatomy & construction | 4.5/10 | 5.5/10 |
| Space & placement | 5.0/10 | 6.5/10 |
| Light & reflections | 4.0/10 | 5.0/10 |
| Purposeful detail | 4.0/10 | 6.0/10 |
| Artistry & character | 4.0/10 | 5.0/10 |
| Materials & effects | 4.0/10 | 5.0/10 |
| Visual integrity | 5.5/10 | 8.0/10 |
A cycling pelican tests anatomy, riding posture and contact between the bird and the bicycle.