# Grok 4.5 vs Hy4 preview

> Side-by-side benchmark comparison for Grok 4.5 and Hy4 preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-5-vs-hy4-preview
- Last updated: October 13, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Grok 4.5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Grok 4.5 has the higher overall point estimate 62.91 to 60.86. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in multimodal & grounded, where the averages are 82.9 for Grok 4.5 and 88.3 for Hy4 preview.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 67.8% and 55.1%.
- Hy4 preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Hy4 preview also has the larger context window at 1M.

## Model Snapshot

| Property | Grok 4.5 | Hy4 preview |
|----------|----------|----------|
| Creator | xAI | Tencent |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 500K | 1M |
| Overall Score | 62.91 | 60.86 |
| Benchmarks Covered | 19 | 30 |
| Pricing (input/output) | $2.00 / $6.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Grok 4.5 public-lane score: 57.5 (Supported · #31/123)
- Hy4 preview public-lane score: 54.5 (Estimated · #37/123)

| Benchmark | Grok 4.5 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 15.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 83.3% | 85.4% | Hy4 preview |
| deepSwe | 53% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.8% | 55.1% | Grok 4.5 |
| CyberGym | Coming soon | 78.4% | Coming soon |
| WideResearch | Coming soon | 83.9% | Coming soon |
| DRACO | Coming soon | 77.2% | Coming soon |
| MCP Atlas | Coming soon | 83.7% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| APEX-Agents | Coming soon | 37.1% | Coming soon |
| skillsBench | Coming soon | 62.9% | Coming soon |
| JobBench | Coming soon | 61.7% | Coming soon |
| Agents' Last Exam | Coming soon | 22.8% | Coming soon |
| AutomationBench | Coming soon | 32.1% | Coming soon |
| BankerToolBench | Coming soon | 78.6% | Coming soon |
| HLE w/ tools | Coming soon | 55.4% | Coming soon |
| CWE-bench v1 | Coming soon | 53.0% | Coming soon |

### Coding

- Winner: Hy4 preview
- Grok 4.5 public-lane score: 56.2 (Supported · #28/148)
- Hy4 preview public-lane score: 57.1 (Supported · #26/148)

| Benchmark | Grok 4.5 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 64.7% | 65.7% | Hy4 preview |
| SWE Multilingual | 78% | 82.9% | Hy4 preview |
| Terminal-Bench 2.1 | 83.3% | 85.4% | Hy4 preview |
| CursorBench 3.2 | 66.7% | Coming soon | Coming soon |
| VulcanBench v3 | 89.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 86.6% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 23.4% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 64.3% | Coming soon |
| NL2Repo | Coming soon | 58.9% | Coming soon |
| ProgramBench | Coming soon | 17.5% | Coming soon |
| PostTrain Bench | Coming soon | 35.6% | Coming soon |
| sweMarathon | Coming soon | 31.9% | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4.5 public-lane score: 54.1 (#29/29)
- Hy4 preview public-lane score: Coming soon

| Benchmark | Grok 4.5 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 52.6% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.3% | Coming soon | Coming soon |
| ARC-AGI-1 | 85.67% | Coming soon | Coming soon |
| CritPt | Coming soon | 16.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4.5 public-lane score: 82.9 (Unranked · 1 rankable row)
- Hy4 preview public-lane score: 88.3 (Unranked · 1 rankable row)

| Benchmark | Grok 4.5 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 66.2% | Coming soon |

### Knowledge

- Winner: Directional only
- Grok 4.5 public-lane score: 66.9 (Supported · #27/180)
- Hy4 preview public-lane score: 63.6 (Estimated · #39/180)

| Benchmark | Grok 4.5 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 92.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.2% | Coming soon | Coming soon |
| GPQA | Coming soon | 92.3% | Coming soon |
| GPQA-D | Coming soon | 92.3% | Coming soon |
| HLE | Coming soon | 55.4% | Coming soon |
| HLE w/o tools | Coming soon | 43.4% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4.5 public-lane score: 62.9 (Unranked · 2 rankable rows)
- Hy4 preview public-lane score: Coming soon

| Benchmark | Grok 4.5 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 57.193% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 24.390% | Coming soon | Coming soon |
| Apex | Coming soon | 74.2% | Coming soon |

## FAQ

### Which is better overall, Grok 4.5 or Hy4 preview?

Grok 4.5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Grok 4.5 and Hy4 preview?

The widest category gap is in multimodal & grounded, where the averages are 82.9 for Grok 4.5 and 88.3 for Hy4 preview.

### How many benchmarks does Grok 4.5 cover on BenchLM?

Grok 4.5 currently has 19 sourced benchmark scores on BenchLM.

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

Hy4 preview currently has 30 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Grok 4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-5)
- [Hy4 preview vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-hy4-preview)
- [Grok 4.5 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-grok-4-5)
- [Hy4 preview vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-hy4-preview)

## Explore More

- [Grok 4.5 profile](/models/grok-4-5)
- [Hy4 preview profile](/models/hy4-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)