# Particle-1 vs Beam 1.0 501B-A23B

> Side-by-side benchmark comparison for Particle-1 and Beam 1.0 501B-A23B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/particle-1-vs-reflection-beam
- Last updated: October 29, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Beam 1.0 501B-A23B leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Beam 1.0 501B-A23B has the higher overall point estimate 43.08 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is DeepSWE in Coding, with scores of 72.6% and 43.3%.
- Beam 1.0 501B-A23B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Particle-1 | Beam 1.0 501B-A23B |
|----------|----------|----------|
| Creator | Particle AI | Reflection AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 43.08 |
| Benchmarks Covered | 5 | 19 |
| Pricing (input/output) | $0.25 / $1.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Particle-1 public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 44.8 (Supported · #65/135)

| Benchmark | Particle-1 | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 79.9% | 80.1% | Beam 1.0 501B-A23B |
| τ³-bench results | Coming soon | 36.1% | Coming soon |
| HLE w/ tools | Coming soon | 51.1% | Coming soon |
| MCP Atlas | Coming soon | 80.8% | Coming soon |
| BrowseComp | Coming soon | 76.8% | Coming soon |
| DeepSearchQA | Coming soon | 80.5% | Coming soon |

### Coding

- Winner: Not comparable
- Particle-1 public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 28.7 (Estimated · #106/156)

| Benchmark | Particle-1 | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 79.9% | 80.1% | Beam 1.0 501B-A23B |
| DeepSWE | 72.6% | 43.3% | Particle-1 |
| SWE-bench Pro | Coming soon | 66.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 31.8% | Coming soon |
| SWE Multilingual | Coming soon | 78.3% | Coming soon |
| SWE-bench Verified | Coming soon | 81.6% | Coming soon |
| SciCode | Coming soon | 49.2% | Coming soon |

### Reasoning

- Winner: Not comparable
- Particle-1 public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 78.7 (Unranked · 2 rankable rows)

| Benchmark | Particle-1 | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 16.3% | Coming soon |
| LongBench v2 | Coming soon | 67.5% | Coming soon |

### Knowledge

- Winner: Not comparable
- Particle-1 public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 48.1 (Supported · #86/179)

| Benchmark | Particle-1 | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 90.4% | 90.6% | Beam 1.0 501B-A23B |
| MMLU | 86.1% | Coming soon | Coming soon |
| HLE w/o tools | Coming soon | 36% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Particle-1 public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: Coming soon

| Benchmark | Particle-1 | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.6% | Coming soon |

### Mathematics

- Winner: Not comparable
- Particle-1 public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: Coming soon

| Benchmark | Particle-1 | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.7% | Coming soon |

## FAQ

### Which is better overall, Particle-1 or Beam 1.0 501B-A23B?

Beam 1.0 501B-A23B has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does Particle-1 cover on BenchLM?

Particle-1 currently has 5 sourced benchmark scores on BenchLM.

### How many benchmarks does Beam 1.0 501B-A23B cover on BenchLM?

Beam 1.0 501B-A23B currently has 19 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Particle-1 vs Beam 1.0 501B-A23B FP8](/compare/particle-1-vs-reflection-beam-fp8)
- [Beam 1.0 501B-A23B vs Beam 1.0 501B-A23B FP8](/compare/reflection-beam-vs-reflection-beam-fp8)
- [Particle-1 vs Beam 1.0 501B-A23B NVFP4](/compare/particle-1-vs-reflection-beam-nvfp4)
- [Beam 1.0 501B-A23B vs Beam 1.0 501B-A23B NVFP4](/compare/reflection-beam-vs-reflection-beam-nvfp4)

## Explore More

- [Particle-1 profile](/models/particle-1)
- [Beam 1.0 501B-A23B profile](/models/reflection-beam)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)