# Grok 4.20 vs Hy4 preview

> Side-by-side benchmark comparison for Grok 4.20 and Hy4 preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-hy4-preview
- Last updated: October 13, 2026

- Shared sourced benchmarks: 4
- 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 60.86 to 57.22. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 21.9 for Grok 4.20 and 57.1 for Hy4 preview.
- The biggest single benchmark swing is SWE-bench Pro in Coding, with scores of 51.8% and 65.7%.
- Hy4 preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.20 also has the larger context window at 2M.

## Model Snapshot

| Property | Grok 4.20 | Hy4 preview |
|----------|----------|----------|
| Creator | xAI | Tencent |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 1M |
| Overall Score | 57.22 | 60.86 |
| Benchmarks Covered | 23 | 30 |
| Pricing (input/output) | $1.25 / $2.50 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Grok 4.20 public-lane score: 24.4 (Supported · #99/123)
- Hy4 preview public-lane score: 54.5 (Estimated · #37/123)

| Benchmark | Grok 4.20 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 47.1% | Coming soon | Coming soon |
| DeepSearchQA | 62.8% | Coming soon | Coming soon |
| Gert Labs | 38.36% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 44.2% | 55.1% | Hy4 preview |
| Terminal-Bench 2.1 | Coming soon | 85.4% | Coming soon |
| 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 4.20 public-lane score: 21.9 (Supported · #116/148)
- Hy4 preview public-lane score: 57.1 (Supported · #26/148)

| Benchmark | Grok 4.20 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 74.2% | Coming soon | Coming soon |
| SWE-bench Verified | 76.7% | Coming soon | Coming soon |
| SWE-bench Pro | 51.8% | 65.7% | Hy4 preview |
| Vibe Code Bench | 4.06% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.3% | Coming soon | Coming soon |
| SWE-bench (Vals) | 72.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 85.4% | Coming soon |
| SWE Multilingual | Coming soon | 82.9% | 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 4.20 public-lane score: 44.9 (Unranked · 2 rankable rows)
- Hy4 preview public-lane score: Coming soon

| Benchmark | Grok 4.20 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 53.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |
| CritPt | Coming soon | 16.9% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4.20 public-lane score: 53.4 (#47/54)
- Hy4 preview public-lane score: 88.3 (Unranked · 1 rankable row)

| Benchmark | Grok 4.20 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 75.2% | Coming soon | Coming soon |
| CharXiv | 60.9% | Coming soon | Coming soon |
| ERQA | 54.1% | Coming soon | Coming soon |
| SimpleVQA | 57.4% | Coming soon | Coming soon |
| MedXpertQA (MM) | 65.8% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 66.2% | Coming soon |

### Knowledge

- Winner: Directional only
- Grok 4.20 public-lane score: 52.5 (Supported · #68/180)
- Hy4 preview public-lane score: 63.6 (Estimated · #39/180)

| Benchmark | Grok 4.20 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 88.5% | 92.3% | Hy4 preview |
| HLE w/o tools | 31.6% | 43.4% | Hy4 preview |
| HealthBench Hard | 20.3% | Coming soon | Coming soon |
| MedXpertQA (Text) | 50.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.6% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.3% | Coming soon | Coming soon |
| GPQA | Coming soon | 92.3% | Coming soon |
| HLE | Coming soon | 55.4% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4.20 public-lane score: Coming soon
- Hy4 preview public-lane score: Coming soon

| Benchmark | Grok 4.20 | Hy4 preview | Winner |
|-----------|-----------|-----------|--------|
| Apex | Coming soon | 74.2% | Coming soon |

## FAQ

### Which is better overall, Grok 4.20 or Hy4 preview?

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

### Where is the biggest gap between Grok 4.20 and Hy4 preview?

The widest category gap is in coding, where the averages are 21.9 for Grok 4.20 and 57.1 for Hy4 preview.

### How many benchmarks does Grok 4.20 cover on BenchLM?

Grok 4.20 currently has 23 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 4.20 vs Grok 4.20 Multi-agent](/compare/grok-4-20-beta-vs-grok-4-20-multi-agent-beta)
- [Hy4 preview vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-hy4-preview)
- [Grok 4.20 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-20-beta)
- [Hy4 preview vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-hy4-preview)

## Explore More

- [Grok 4.20 profile](/models/grok-4-20-beta)
- [Hy4 preview profile](/models/hy4-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)