# GPT-5.4 nano vs Grok 4.5

> Side-by-side benchmark comparison for GPT-5.4 nano and Grok 4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-nano-vs-grok-4-5
- Last updated: October 7, 2026

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

## Quick Verdict

Pick Grok 4.5 if you want the stronger benchmark profile. GPT-5.4 nano only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Grok 4.5 leads overall 63.97 to 47.51.
- The clearest category separation is in multimodal & grounded, where the averages are 24.9 for GPT-5.4 nano and 79.5 for Grok 4.5.
- The biggest single benchmark swing is ARC-AGI-2 in Reasoning, with scores of 5.7% and 52.6%.
- GPT-5.4 nano is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.5 also has the larger context window at 500K.

## Model Snapshot

| Property | GPT-5.4 nano | Grok 4.5 |
|----------|----------|----------|
| Creator | OpenAI | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 500K |
| Overall Score | 47.51 | 63.97 |
| Benchmarks Covered | 20 | 17 |
| Pricing (input/output) | $0.20 / $1.25 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Grok 4.5
- GPT-5.4 nano public-lane score: 32.2 (Supported · #80/122)
- Grok 4.5 public-lane score: 57.6 (Supported · #29/122)

| Benchmark | GPT-5.4 nano | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 46.3% | Coming soon | Coming soon |
| OSWorld-Verified | 39% | Coming soon | Coming soon |
| MCP Atlas | 56.1% | Coming soon | Coming soon |
| Toolathlon | 35.5% | Coming soon | Coming soon |
| τ²-bench results | 92.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 41.6% | 67.8% | Grok 4.5 |
| Terminal-Bench 3.0 | Coming soon | 15.7% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.3% | Coming soon |
| deepSwe | Coming soon | 53% | Coming soon |

### Coding

- Winner: Grok 4.5
- GPT-5.4 nano public-lane score: 31.1 (Supported · #92/146)
- Grok 4.5 public-lane score: 57.7 (Supported · #27/146)

| Benchmark | GPT-5.4 nano | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 26.10% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.0% | 87.4% | Grok 4.5 |
| SWE-bench (Vals) | 69.8% | 86.6% | Grok 4.5 |
| SWE-bench Pro | Coming soon | 64.7% | Coming soon |
| SWE Multilingual | Coming soon | 78% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.3% | Coming soon |
| CursorBench 3.2 | Coming soon | 66.7% | Coming soon |
| VulcanBench v3 | Coming soon | 89.9% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 23.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 37 (Unranked · 4 rankable rows)
- Grok 4.5 public-lane score: 50.4 (#28/28)

| Benchmark | GPT-5.4 nano | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 51.50% | 85.67% | Grok 4.5 |
| ARC-AGI-2 | 5.7% | 52.6% | Grok 4.5 |
| ARC-AGI-3 | Coming soon | 0.3% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 24.9 (#46/49)
- Grok 4.5 public-lane score: 79.5 (Unranked · 1 rankable row)

| Benchmark | GPT-5.4 nano | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 66.1% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 69.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Grok 4.5
- GPT-5.4 nano public-lane score: 38 (Supported · #108/174)
- Grok 4.5 public-lane score: 67 (Supported · #19/174)

| Benchmark | GPT-5.4 nano | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 82.8% | Coming soon | Coming soon |
| HLE | 37.7% | Coming soon | Coming soon |
| HLE w/o tools | 24.3% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 77.5% | 92.9% | Grok 4.5 |
| MMLU-Pro (Vals) | 77.2% | 89.2% | Grok 4.5 |

### Instruction Following

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 91.9 (#9/125)
- Grok 4.5 public-lane score: Coming soon

### Mathematics

- Winner: Not comparable
- GPT-5.4 nano public-lane score: 43.8 (Unranked · 2 rankable rows)
- Grok 4.5 public-lane score: Coming soon

| Benchmark | GPT-5.4 nano | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 25.860% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 6.250% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.4 nano or Grok 4.5?

Grok 4.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 nano and Grok 4.5?

The widest category gap is in multimodal & grounded, where the averages are 24.9 for GPT-5.4 nano and 79.5 for Grok 4.5.

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

GPT-5.4 nano currently has 20 sourced benchmark scores on BenchLM.

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

Grok 4.5 currently has 17 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.4 nano vs GPT-5.4 Pro](/compare/gpt-5-4-nano-vs-gpt-5-4-pro)
- [Grok 4.5 vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-grok-4-5)
- [GPT-5.4 nano vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-nano)
- [Grok 4.5 vs GPT-5.4](/compare/gpt-5-4-vs-grok-4-5)

## Explore More

- [GPT-5.4 nano profile](/models/gpt-5-4-nano)
- [Grok 4.5 profile](/models/grok-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)