# GPT-4.5 vs GPT-5.4 mini

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

- Canonical page: https://benchlm.ai/compare/gpt-4-5-vs-gpt-5-4-mini
- Last updated: October 14, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-4.5 and GPT-5.4 mini share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-5.4 mini has the lower published output-token price.
- GPT-5.4 mini has the larger published context window at 400K.

## Model Snapshot

| Property | GPT-4.5 | GPT-5.4 mini |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 400K |
| Independent public score (not head-to-head) | null | 53.21 |
| Benchmarks Covered | 6 | 22 |
| Pricing (input/output) | $75.00 / $150.00 | $0.75 / $4.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 34.7 (Supported · #76/124)

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 60% | Coming soon |
| OSWorld-Verified | Coming soon | 72.1% | Coming soon |
| MCP Atlas | Coming soon | 57.7% | Coming soon |
| Toolathlon | Coming soon | 42.9% | Coming soon |
| τ²-bench results | Coming soon | 93.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 54.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 35.8 (Supported · #75/149)

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 88.6% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 60.0% | Coming soon |
| Vibe Code Bench | Coming soon | 47.97% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 27.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 81.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 73.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 43.7 (Unranked · 4 rankable rows)

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| DROP | 83.4% | Coming soon | Coming soon |
| ARC-AGI-1 | Coming soon | 63.70% | Coming soon |
| ARC-AGI-2 | Coming soon | 18.9% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 73.8 (#28/54)

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 76.6% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 78% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 51.3 (Supported · #73/181)

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 90.8% | Coming soon | Coming soon |
| GPQA | 69.5% | 88% | GPT-5.4 mini |
| SimpleQA | 62.5% | Coming soon | Coming soon |
| HLE | Coming soon | 41.5% | Coming soon |
| HLE w/o tools | Coming soon | 28.2% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 83.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 84.6% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: Coming soon

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| MGSM | 86.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 89.9 (#27/128)

### Mathematics

- Winner: Insufficient shared evidence
- GPT-4.5 public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 55.9 (Unranked · 2 rankable rows)

| Benchmark | GPT-4.5 | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 51.228% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 9.756% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-4.5 and GPT-5.4 mini?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

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

## Explore More

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