# GPT-5.4 vs Grok 4.20

> Side-by-side benchmark comparison for GPT-5.4 and Grok 4.20 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-vs-grok-4-20-beta
- Last updated: September 10, 2026

- Shared sourced benchmarks: 17
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GPT-5.4 if you want the stronger benchmark profile. Grok 4.20 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.4 leads overall 70.85 to 67.13.
- The clearest category separation is in multimodal & grounded, where the averages are 69.3 for GPT-5.4 and 34.6 for Grok 4.20.
- The biggest single benchmark swing is Vibe Code Bench in Coding, with scores of 67.42% and 4.06%.
- Grok 4.20 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 | GPT-5.4 | Grok 4.20 |
|----------|----------|----------|
| Creator | OpenAI | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 2M |
| Overall Score | 70.85 | 67.13 |
| Benchmarks Covered | 38 | 23 |
| Pricing (input/output) | $2.50 / $15.00 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.4
- GPT-5.4 public-lane score: 52.5 (Supported · #40/152)
- Grok 4.20 public-lane score: 26.7 (Supported · #145/152)

| Benchmark | GPT-5.4 | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 75.1% | 47.1% | GPT-5.4 |
| CyberGym | 79.0% | Coming soon | Coming soon |
| BrowseComp | 82.7% | Coming soon | Coming soon |
| OSWorld-Verified | 75% | Coming soon | Coming soon |
| MCP Atlas | 70.6% | Coming soon | Coming soon |
| Toolathlon | 54.6% | Coming soon | Coming soon |
| τ²-bench results | 98.9% | Coming soon | Coming soon |
| Claw-Eval | 60.3% | Coming soon | Coming soon |
| DeepSearchQA | 73.6% | 62.8% | GPT-5.4 |
| Gert Labs | 64.89% | 38.36% | GPT-5.4 |
| ResearchClawBench | 15.3% | Coming soon | Coming soon |
| JobBench | 38.9% | Coming soon | Coming soon |
| ExploitGym | 6.0% | Coming soon | Coming soon |
| ApprenticeBench | 11% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 44.2% | Coming soon |

### Coding

- Winner: GPT-5.4
- GPT-5.4 public-lane score: 53.9 (Supported · #42/151)
- Grok 4.20 public-lane score: 28.2 (Supported · #141/151)

| Benchmark | GPT-5.4 | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 87.5% | 74.2% | GPT-5.4 |
| SWE-bench Pro | 57.7% | 51.8% | GPT-5.4 |
| React Native Evals | 85.3% | Coming soon | Coming soon |
| Vibe Code Bench | 67.42% | 4.06% | GPT-5.4 |
| SWE-bench Verified | Coming soon | 76.7% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 84.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 72.2% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.4 public-lane score: 69.3 (#20/48)
- Grok 4.20 public-lane score: 34.6 (#43/48)

| Benchmark | GPT-5.4 | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 81.2% | 75.2% | GPT-5.4 |
| OfficeQA Pro | 53.2% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 82.1% | Coming soon | Coming soon |
| CharXiv | 82.8% | 60.9% | GPT-5.4 |
| ERQA | 65.4% | 54.1% | GPT-5.4 |
| SimpleVQA | 61.1% | 57.4% | GPT-5.4 |
| ScreenSpot Pro | 85.4% | Coming soon | Coming soon |
| ZeroBench | 41.0% | Coming soon | Coming soon |
| MedXpertQA (MM) | 77.1% | 65.8% | GPT-5.4 |

### Reasoning

- Winner: Coming soon
- GPT-5.4 public-lane score: 57.2 (#17/20)
- Grok 4.20 public-lane score: 34.2 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.4 | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 74.0% | 53.3% | GPT-5.4 |
| ARC-AGI-3 | 0.2% | 0.1% | GPT-5.4 |

### Knowledge

- Winner: GPT-5.4
- GPT-5.4 public-lane score: 69.2 (Supported · #15/183)
- Grok 4.20 public-lane score: 49.4 (Supported · #85/183)

| Benchmark | GPT-5.4 | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.8% | Coming soon | Coming soon |
| HLE | 52.1% | Coming soon | Coming soon |
| HLE w/o tools | 39.8% | 31.6% | GPT-5.4 |
| GPQA-D | 92.8% | 88.5% | GPT-5.4 |
| HealthBench Hard | 40.1% | 20.3% | GPT-5.4 |
| MedXpertQA (Text) | 59.6% | 50.2% | GPT-5.4 |
| HealthBench Professional | 48.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 88.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.3% | Coming soon |

### Instruction Following

- Winner: Coming soon
- GPT-5.4 public-lane score: 90.6 (#19/123)
- Grok 4.20 public-lane score: Coming soon

### Mathematics

- Winner: Coming soon
- GPT-5.4 public-lane score: 64.5 (Unranked · 2 rankable rows)
- Grok 4.20 public-lane score: Coming soon

| Benchmark | GPT-5.4 | Grok 4.20 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 47.600% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 27.100% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.4 or Grok 4.20?

GPT-5.4 is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 and Grok 4.20?

The widest category gap is in multimodal & grounded, where the averages are 69.3 for GPT-5.4 and 34.6 for Grok 4.20.

### How many benchmarks does GPT-5.4 cover on BenchLM?

GPT-5.4 currently has 38 sourced benchmark scores on BenchLM.

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

Grok 4.20 currently has 23 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.4 vs GPT-5.4 mini](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Grok 4.20 vs GPT-5.4 mini](/compare/gpt-5-4-mini-vs-grok-4-20-beta)
- [GPT-5.4 vs GPT-5.4 Pro](/compare/gpt-5-4-vs-gpt-5-4-pro)
- [Grok 4.20 vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-grok-4-20-beta)

## Explore More

- [GPT-5.4 profile](/models/gpt-5-4)
- [Grok 4.20 profile](/models/grok-4-20-beta)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)