# Beam 1.0 501B-A23B FP8 vs Step 5 Preview

> Side-by-side benchmark comparison for Beam 1.0 501B-A23B FP8 and Step 5 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/reflection-beam-fp8-vs-step-5-preview
- Last updated: October 16, 2026

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

## Quick Verdict

Beam 1.0 501B-A23B FP8 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 FP8 has the higher overall point estimate 71 to 69.45. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in reasoning, where the averages are 85.8 for Beam 1.0 501B-A23B FP8 and 83.4 for Step 5 Preview.
- The biggest single benchmark swing is DeepSWE in Coding, with scores of 43.0% and 67.7%.
- Beam 1.0 501B-A23B FP8 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Beam 1.0 501B-A23B FP8 | Step 5 Preview |
|----------|----------|----------|
| Creator | Reflection AI | StepFun |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 69.45 |
| Benchmarks Covered | 19 | 24 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $1.00 / $2.70 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 5 Preview public-lane score: 65.3 (Estimated · #18/128)

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | 36.8% | Coming soon | Coming soon |
| HLE w/ tools | 51.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 78.9% | 85.0% | Step 5 Preview |
| MCP Atlas | 81.5% | 85.6% | Step 5 Preview |
| BrowseComp | 76.7% | 88.7% | Step 5 Preview |
| DeepSearchQA | 79.6% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 33.30% | Coming soon |
| CyberGym | Coming soon | 84.7% | Coming soon |
| AutomationBench | Coming soon | 44.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| JobBench | Coming soon | 59.0% | Coming soon |
| APEX-Agents | Coming soon | 37.8% | Coming soon |
| DRACO | Coming soon | 83.3% | Coming soon |
| Agents' Last Exam | Coming soon | 29.5% | Coming soon |
| Hermes Index | Coming soon | 32.8% | Coming soon |
| Hermes Bench | Coming soon | 69.2% | Coming soon |

### Coding

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 5 Preview public-lane score: 60.5 (Estimated · #20/150)

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 43.0% | 67.7% | Step 5 Preview |
| SWE-bench Pro | 65.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 78.9% | 85.0% | Step 5 Preview |
| SWE-Atlas Codebase QnA | 32.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.1% | Coming soon | Coming soon |
| SWE-bench Verified | 80.2% | Coming soon | Coming soon |
| SciCode | 48.3% | 58.9% | Step 5 Preview |
| ProgramBench | Coming soon | 80.5% | Coming soon |
| sweMarathon | Coming soon | 72.7% | Coming soon |
| MLS-Bench Lite | Coming soon | 40.5% | Coming soon |

### Reasoning

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: 85.8 (Unranked · 3 rankable rows)
- Step 5 Preview public-lane score: 83.4 (Unranked · 2 rankable rows)

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 17.4% | 20.9% | Step 5 Preview |
| LongBench v2 | 67.6% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 5 Preview public-lane score: 74.6 (#24/54)

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 60.3% | Coming soon |
| MMMU-Pro | Coming soon | 76% | Coming soon |

### Knowledge

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 5 Preview public-lane score: 68.7 (Supported · #22/184)

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 90.3% | 93.5% | Step 5 Preview |
| HLE w/o tools | 36% | Coming soon | Coming soon |
| HLE | Coming soon | 46.5% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: 89.8 (#28/148)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 80.7% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Beam 1.0 501B-A23B FP8 public-lane score: 87.9 (Unranked · 1 rankable row)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 98.0% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Beam 1.0 501B-A23B FP8 or Step 5 Preview?

Beam 1.0 501B-A23B FP8 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Beam 1.0 501B-A23B FP8 and Step 5 Preview?

The widest category gap is in reasoning, where the averages are 85.8 for Beam 1.0 501B-A23B FP8 and 83.4 for Step 5 Preview.

### How many benchmarks does Beam 1.0 501B-A23B FP8 cover on BenchLM?

Beam 1.0 501B-A23B FP8 currently has 19 sourced benchmark scores on BenchLM.

### How many benchmarks does Step 5 Preview cover on BenchLM?

Step 5 Preview currently has 24 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Beam 1.0 501B-A23B FP8 vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-reflection-beam-fp8)
- [Step 5 Preview vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-step-5-preview)
- [Beam 1.0 501B-A23B FP8 vs Beam 1.0 501B-A23B NVFP4](/compare/reflection-beam-fp8-vs-reflection-beam-nvfp4)
- [Step 5 Preview vs Beam 1.0 501B-A23B NVFP4](/compare/reflection-beam-nvfp4-vs-step-5-preview)

## Explore More

- [Beam 1.0 501B-A23B FP8 profile](/models/reflection-beam-fp8)
- [Step 5 Preview profile](/models/step-5-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)