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Compare performance benchmarks, coding intelligence, reasoning evaluations, context limits, and API economics between Muse Spark Open (Meta) and Beam 1.0 501B A23B (Reflection AI).
| Metric / Capability | Muse Spark Open | Beam 1.0 501B A23B |
|---|---|---|
| Developer / Organization | Meta | Reflection AI |
| Release Date | 2026-10-15 | 2026-10-16 |
| Deployment / Weights | Open Weights | Open Weights |
| Context Window | 1.0M tokens (1,048,576 tokens) | 1.0M tokens (1,048,576 tokens) |
| Input Pricing (/1M Tokens) | Free (Open Weights) | Free (Open Weights) |
| Output Pricing (/1M Tokens) | Free (Open Weights) | Free (Open Weights) |
| Benchmark / Domain | Muse Spark Open | Beam 1.0 501B A23B | Advantage |
|---|---|---|---|
Artificial Analysis Coding Agent Index v2.0 Composite index of coding-agent systems (model + harness) across FrontierCode v1.1, SWE-Atlas-QnA, and Terminal-Bench v4. | 26.3% | — | — |
SWE-bench Pro Harder, contamination-resistant successor to SWE-bench spanning multiple languages. | — | 66.1% | — |
ARC-AGI-2 Novel visual grid puzzles requiring abstract rule induction. | 57.5% | — | — |
GPQA Diamond Graduate-level physics, chemistry, and biology questions written by domain experts. | — | 90.6% | — |
Humanity's Last Exam Expert-written questions across hundreds of disciplines designed to resist saturation. | — | 36.0% | — |
Design Arena ELO Human-preference ELO across UI, 3D, data-visualization, and game-dev generations. | 1338 | 1227 | Muse Spark Open (+9%) |
Muse Spark Open leads across 1 evaluated benchmarks compared to 0 for Beam 1.0 501B A23B, showing notable advantages in Design Arena ELO.
Both models feature equivalent context windows of 1.0M tokens (1,048,576 tokens).
Both models have comparable pricing structures or open weight deployment options.
Muse Spark Open is an open-weights model. Beam 1.0 501B A23B is an open-weights model.
Analyze 130+ models side-by-side using interactive radar charts, cost-efficiency quadrant plots, and live dataset filters on the full NeuBench index.
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