# GPT-5.4 mini vs Grok 4.3

> Side-by-side benchmark comparison for GPT-5.4 mini and Grok 4.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-4-mini-vs-grok-4-3
- Last updated: September 10, 2026

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

## Quick Verdict

Pick GPT-5.4 mini if you want the stronger benchmark profile. Grok 4.3 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.4 mini leads overall 61.11 to 59.73.
- The clearest category separation is in agentic, where the averages are 39.1 for GPT-5.4 mini and 26.9 for Grok 4.3.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 54.7% and 41.9%.
- Grok 4.3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.3 also has the larger context window at 1M.

## Model Snapshot

| Property | GPT-5.4 mini | Grok 4.3 |
|----------|----------|----------|
| Creator | OpenAI | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Overall Score | 61.11 | 59.73 |
| Benchmarks Covered | 19 | 7 |
| Pricing (input/output) | $0.75 / $4.50 | $1.25 / $2.50 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 39.1 (Estimated · #119/152)
- Grok 4.3 public-lane score: 26.9 (Supported · #144/152)

| Benchmark | GPT-5.4 mini | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 60% | Coming soon | Coming soon |
| OSWorld-Verified | 72.1% | Coming soon | Coming soon |
| MCP Atlas | 57.7% | Coming soon | Coming soon |
| Toolathlon | 42.9% | Coming soon | Coming soon |
| τ²-bench results | 93.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 54.7% | 41.9% | GPT-5.4 mini |
| Gert Labs | Coming soon | 43.86% | Coming soon |
| ResearchClawBench | Coming soon | 12.4% | Coming soon |

### Coding

- Winner: GPT-5.4 mini
- GPT-5.4 mini public-lane score: 42.7 (Supported · #104/151)
- Grok 4.3 public-lane score: 33.6 (Supported · #131/151)

| Benchmark | GPT-5.4 mini | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 47.97% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 27.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.5% | 84.5% | Grok 4.3 |
| SWE-bench (Vals) | 73.0% | 71.4% | GPT-5.4 mini |

### Multimodal & Grounded

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 57.2 (#31/48)
- Grok 4.3 public-lane score: 65.6 (#25/48)

| Benchmark | GPT-5.4 mini | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 76.6% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 78% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 73.9 (Unranked · 2 rankable rows)
- Grok 4.3 public-lane score: 65.2 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Grok 4.3
- GPT-5.4 mini public-lane score: 55.6 (Supported · #52/183)
- Grok 4.3 public-lane score: 57 (Supported · #44/183)

| Benchmark | GPT-5.4 mini | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 88% | Coming soon | Coming soon |
| HLE | 41.5% | Coming soon | Coming soon |
| HLE w/o tools | 28.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 83.1% | 91.4% | Grok 4.3 |
| MMLU-Pro (Vals) | 84.6% | 85.8% | Grok 4.3 |

### Instruction Following

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 89.8 (#23/123)
- Grok 4.3 public-lane score: 94.4 (#2/123)

### Mathematics

- Winner: Coming soon
- GPT-5.4 mini public-lane score: 44.5 (Unranked · 2 rankable rows)
- Grok 4.3 public-lane score: Coming soon

| Benchmark | GPT-5.4 mini | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 28.280% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.080% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.4 mini or Grok 4.3?

GPT-5.4 mini is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.4 mini and Grok 4.3?

The widest category gap is in agentic, where the averages are 39.1 for GPT-5.4 mini and 26.9 for Grok 4.3.

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

GPT-5.4 mini currently has 19 sourced benchmark scores on BenchLM.

### How many benchmarks does Grok 4.3 cover on BenchLM?

Grok 4.3 currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.4 mini vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Grok 4.3 vs GPT-5.4](/compare/gpt-5-4-vs-grok-4-3)
- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)
- [Grok 4.3 vs GPT-5.4 Pro](/compare/gpt-5-4-pro-vs-grok-4-3)

## Explore More

- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Grok 4.3 profile](/models/grok-4-3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)