# Beam 1.0 501B-A23B FP8 vs Step 3.5 Flash

> Side-by-side benchmark comparison for Beam 1.0 501B-A23B FP8 and Step 3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/reflection-beam-fp8-vs-step-3-5-flash
- Last updated: October 16, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Beam 1.0 501B-A23B FP8 and Step 3.5 Flash share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Beam 1.0 501B-A23B FP8 has the lower published output-token price.
- Beam 1.0 501B-A23B FP8 has the larger published context window at 1M.

## Model Snapshot

| Property | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash |
|----------|----------|----------|
| Creator | Reflection AI | StepFun |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | null | 42.11 |
| Benchmarks Covered | 19 | 3 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.10 / $0.30 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash | 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% | Coming soon | Coming soon |
| MCP Atlas | 81.5% | Coming soon | Coming soon |
| BrowseComp | 76.7% | Coming soon | Coming soon |
| DeepSearchQA | 79.6% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 43.0% | Coming soon | Coming soon |
| SWE-bench Pro | 65.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 78.9% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 32.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.1% | Coming soon | Coming soon |
| SWE-bench Verified | 80.2% | 74.4% | Beam 1.0 501B-A23B FP8 |
| SciCode | 48.3% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 86.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Beam 1.0 501B-A23B FP8 public-lane score: 85.8 (Unranked · 3 rankable rows)
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 17.4% | Coming soon | Coming soon |
| LongBench v2 | 67.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 90.3% | Coming soon | Coming soon |
| HLE w/o tools | 36% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Beam 1.0 501B-A23B FP8 public-lane score: 89.8 (#28/148)
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 80.7% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Beam 1.0 501B-A23B FP8 public-lane score: 87.9 (Unranked · 1 rankable row)
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Beam 1.0 501B-A23B FP8 | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 98.0% | Coming soon | Coming soon |
| AIME 2025 | Coming soon | 97.3% | Coming soon |

## FAQ

### Is there enough evidence to pick between Beam 1.0 501B-A23B FP8 and Step 3.5 Flash?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Beam 1.0 501B-A23B FP8 vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-reflection-beam-fp8)
- [Step 3.5 Flash vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-step-3-5-flash)
- [Beam 1.0 501B-A23B FP8 vs Beam 1.0 501B-A23B NVFP4](/compare/reflection-beam-fp8-vs-reflection-beam-nvfp4)
- [Step 3.5 Flash vs Beam 1.0 501B-A23B NVFP4](/compare/reflection-beam-nvfp4-vs-step-3-5-flash)

## Explore More

- [Beam 1.0 501B-A23B FP8 profile](/models/reflection-beam-fp8)
- [Step 3.5 Flash profile](/models/step-3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)