# Beam 1.0 501B-A23B NVFP4 vs Spark-X2.6-4B

> Side-by-side benchmark comparison for Beam 1.0 501B-A23B NVFP4 and Spark-X2.6-4B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/reflection-beam-nvfp4-vs-spark-x2-6-4b
- Last updated: October 20, 2026

- Shared sourced benchmarks: 13
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Beam 1.0 501B-A23B NVFP4 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 NVFP4 has the higher overall point estimate 70 to 40.14. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in reasoning, where the averages are 84.7 for Beam 1.0 501B-A23B NVFP4 and 48.8 for Spark-X2.6-4B.
- The biggest single benchmark swing is BrowseComp in Agentic, with scores of 75.6% and 53.1%.
- Spark-X2.6-4B 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 NVFP4 | Spark-X2.6-4B |
|----------|----------|----------|
| Creator | Reflection AI | SparkLLM |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | null | 40.14 |
| Benchmarks Covered | 19 | 20 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Beam 1.0 501B-A23B NVFP4 public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 33 (Estimated · #89/131)

| Benchmark | Beam 1.0 501B-A23B NVFP4 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | 35.4% | 34.7% | Beam 1.0 501B-A23B NVFP4 |
| HLE w/ tools | 51.1% | 36.9% | Beam 1.0 501B-A23B NVFP4 |
| Terminal-Bench 2.1 | 78.4% | Coming soon | Coming soon |
| MCP Atlas | 80.5% | 62.4% | Beam 1.0 501B-A23B NVFP4 |
| BrowseComp | 75.6% | 53.1% | Beam 1.0 501B-A23B NVFP4 |
| DeepSearchQA | 81.1% | Coming soon | Coming soon |
| BFCL v4 | Coming soon | 71.8% | Coming soon |
| τ²-bench results | Coming soon | 86.9% | Coming soon |
| Claw-Eval | Coming soon | 69.9% | Coming soon |

### Coding

- Winner: Not comparable
- Beam 1.0 501B-A23B NVFP4 public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 30.6 (Estimated · #95/152)

| Benchmark | Beam 1.0 501B-A23B NVFP4 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 42.7% | Coming soon | Coming soon |
| SWE-bench Pro | 65.6% | 54.3% | Beam 1.0 501B-A23B NVFP4 |
| Terminal-Bench 2.1 | 78.4% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 31.4% | Coming soon | Coming soon |
| SWE Multilingual | 77.5% | 64.7% | Beam 1.0 501B-A23B NVFP4 |
| SWE-bench Verified | 80.7% | 62.8% | Beam 1.0 501B-A23B NVFP4 |
| SciCode | 46.9% | 36.8% | Beam 1.0 501B-A23B NVFP4 |

### Reasoning

- Winner: Not comparable
- Beam 1.0 501B-A23B NVFP4 public-lane score: 84.7 (Unranked · 3 rankable rows)
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | Beam 1.0 501B-A23B NVFP4 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| CritPt | 15.4% | Coming soon | Coming soon |
| LongBench v2 | 67.2% | 53.3% | Beam 1.0 501B-A23B NVFP4 |

### Knowledge

- Winner: Not comparable
- Beam 1.0 501B-A23B NVFP4 public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 43 (Estimated · #109/187)

| Benchmark | Beam 1.0 501B-A23B NVFP4 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 89.3% | 77.1% | Beam 1.0 501B-A23B NVFP4 |
| HLE w/o tools | 34.8% | 17.9% | Beam 1.0 501B-A23B NVFP4 |
| GPQA | Coming soon | 69.9% | Coming soon |

### Instruction Following

- Winner: Beam 1.0 501B-A23B NVFP4
- Beam 1.0 501B-A23B NVFP4 public-lane score: 86.2 (#44/149)
- Spark-X2.6-4B public-lane score: 78.2 (#62/149)

| Benchmark | Beam 1.0 501B-A23B NVFP4 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 79.2% | 75.8% | Beam 1.0 501B-A23B NVFP4 |
| IFEval | Coming soon | 93.6% | Coming soon |

### Mathematics

- Winner: Not comparable
- Beam 1.0 501B-A23B NVFP4 public-lane score: 87.9 (Unranked · 1 rankable row)
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)

| Benchmark | Beam 1.0 501B-A23B NVFP4 | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 97.5% | 91.2% | Beam 1.0 501B-A23B NVFP4 |
| HMMT Feb 2026 | Coming soon | 81.3% | Coming soon |
| IMOAnswerBench | Coming soon | 75.2% | Coming soon |

## FAQ

### Which is better overall, Beam 1.0 501B-A23B NVFP4 or Spark-X2.6-4B?

Beam 1.0 501B-A23B NVFP4 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 NVFP4 and Spark-X2.6-4B?

The widest category gap is in reasoning, where the averages are 84.7 for Beam 1.0 501B-A23B NVFP4 and 48.8 for Spark-X2.6-4B.

### How many benchmarks does Beam 1.0 501B-A23B NVFP4 cover on BenchLM?

Beam 1.0 501B-A23B NVFP4 currently has 19 sourced benchmark scores on BenchLM.

### How many benchmarks does Spark-X2.6-4B cover on BenchLM?

Spark-X2.6-4B currently has 20 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Beam 1.0 501B-A23B NVFP4 vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-reflection-beam-nvfp4)
- [Spark-X2.6-4B vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-spark-x2-6-4b)
- [Beam 1.0 501B-A23B NVFP4 vs Beam 1.0 501B-A23B FP8](/compare/reflection-beam-fp8-vs-reflection-beam-nvfp4)
- [Spark-X2.6-4B vs Beam 1.0 501B-A23B FP8](/compare/reflection-beam-fp8-vs-spark-x2-6-4b)

## Explore More

- [Beam 1.0 501B-A23B NVFP4 profile](/models/reflection-beam-nvfp4)
- [Spark-X2.6-4B profile](/models/spark-x2-6-4b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)