# Hy4 preview vs Spark-X2.6-4B

> Side-by-side benchmark comparison for Hy4 preview and Spark-X2.6-4B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/hy4-preview-vs-spark-x2-6-4b
- Last updated: October 20, 2026

- Shared sourced benchmarks: 7
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Hy4 preview leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Hy4 preview has the higher overall point estimate 61.41 to 40.14. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 56.7 for Hy4 preview and 30.6 for Spark-X2.6-4B.
- The biggest single benchmark swing is HLE w/o tools in Knowledge, with scores of 43.4% and 17.9%.

## Model Snapshot

| Property | Hy4 preview | Spark-X2.6-4B |
|----------|----------|----------|
| Creator | Tencent | SparkLLM |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 61.41 | 40.14 |
| Benchmarks Covered | 33 | 20 |
| Pricing (input/output) | $0.00 / $0.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Hy4 preview public-lane score: 56 (Estimated · #40/131)
- Spark-X2.6-4B public-lane score: 33 (Estimated · #89/131)

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.4% | Coming soon | Coming soon |
| CyberGym | 78.4% | Coming soon | Coming soon |
| WideResearch | 83.9% | Coming soon | Coming soon |
| DRACO | 77.2% | Coming soon | Coming soon |
| MCP Atlas | 83.7% | 62.4% | Hy4 preview |
| Toolathlon-Verified | 74.1% | Coming soon | Coming soon |
| APEX-Agents | 37.1% | Coming soon | Coming soon |
| skillsBench | 62.9% | Coming soon | Coming soon |
| JobBench | 61.7% | Coming soon | Coming soon |
| Agents' Last Exam | 22.8% | Coming soon | Coming soon |
| AutomationBench | 32.1% | Coming soon | Coming soon |
| BankerToolBench | 78.6% | Coming soon | Coming soon |
| HLE w/ tools | 55.4% | 36.9% | Hy4 preview |
| Terminal-Bench 2.1 (Vals) | 55.1% | Coming soon | Coming soon |
| CWE-bench v1 | 53.0% | Coming soon | Coming soon |
| Hermes Index | 26.1% | Coming soon | Coming soon |
| Hermes Bench | 58.6% | Coming soon | Coming soon |
| BFCL v4 | Coming soon | 71.8% | Coming soon |
| τ²-bench results | Coming soon | 86.9% | Coming soon |
| BrowseComp | Coming soon | 53.1% | Coming soon |
| τ³-bench results | Coming soon | 34.7% | Coming soon |
| Claw-Eval | Coming soon | 69.9% | Coming soon |

### Coding

- Winner: Directional only
- Hy4 preview public-lane score: 56.7 (Supported · #28/152)
- Spark-X2.6-4B public-lane score: 30.6 (Estimated · #95/152)

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 85.4% | Coming soon | Coming soon |
| SWE-bench Pro | 65.7% | 54.3% | Hy4 preview |
| SWE Multilingual | 82.9% | 64.7% | Hy4 preview |
| DeepSWE | 64.3% | Coming soon | Coming soon |
| NL2Repo | 58.9% | Coming soon | Coming soon |
| ProgramBench | 17.5% | Coming soon | Coming soon |
| PostTrain Bench | 35.6% | Coming soon | Coming soon |
| sweMarathon | 31.9% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 62.8% | Coming soon |
| SciCode | Coming soon | 36.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- Hy4 preview public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| STEMBench | 2.59 | Coming soon | Coming soon |
| CritPt | 16.9% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 53.3% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Hy4 preview public-lane score: 88.3 (Unranked · 1 rankable row)
- Spark-X2.6-4B public-lane score: Coming soon

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Hy4 preview public-lane score: 64.3 (Estimated · #41/187)
- Spark-X2.6-4B public-lane score: 43 (Estimated · #109/187)

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.3% | 69.9% | Hy4 preview |
| GPQA-D | 92.3% | 77.1% | Hy4 preview |
| HLE | 55.4% | Coming soon | Coming soon |
| HLE w/o tools | 43.4% | 17.9% | Hy4 preview |

### Instruction Following

- Winner: Not comparable
- Hy4 preview public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 78.2 (#62/149)

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 93.6% | Coming soon |
| IFBench | Coming soon | 75.8% | Coming soon |

### Mathematics

- Winner: Not comparable
- Hy4 preview public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)

| Benchmark | Hy4 preview | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Apex | 74.2% | Coming soon | Coming soon |
| AIME26 | Coming soon | 91.2% | Coming soon |
| HMMT Feb 2026 | Coming soon | 81.3% | Coming soon |
| IMOAnswerBench | Coming soon | 75.2% | Coming soon |

## FAQ

### Which is better overall, Hy4 preview or Spark-X2.6-4B?

Hy4 preview has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Hy4 preview and Spark-X2.6-4B?

The widest category gap is in coding, where the averages are 56.7 for Hy4 preview and 30.6 for Spark-X2.6-4B.

### How many benchmarks does Hy4 preview cover on BenchLM?

Hy4 preview currently has 33 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

- [Hy4 preview vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-hy4-preview)
- [Spark-X2.6-4B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-spark-x2-6-4b)
- [Hy4 preview vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-hy4-preview)
- [Spark-X2.6-4B vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-spark-x2-6-4b)

## Explore More

- [Hy4 preview profile](/models/hy4-preview)
- [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)