# GPT-4.5 vs o4-mini

> Side-by-side benchmark comparison for GPT-4.5 and o4-mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-4-5-vs-o4-mini
- Last updated: October 14, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick GPT-4.5 if you want the stronger benchmark profile. o4-mini only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-4.5 leads overall 69 to 58.
- The biggest single benchmark swing is SimpleQA in Knowledge, with scores of 62.5% and 20.2%.
- o4-mini is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- o4-mini also has the larger context window at 200K.

## Model Snapshot

| Property | GPT-4.5 | o4-mini |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 200K |
| Overall Score | null | null |
| Benchmarks Covered | 6 | 7 |
| Pricing (input/output) | $75.00 / $150.00 | $1.10 / $4.40 |

## Category Breakdown

### Coding

- Winner: Not comparable
- GPT-4.5 public-lane score: Coming soon
- o4-mini public-lane score: Coming soon

| Benchmark | GPT-4.5 | o4-mini | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 88.6% | 97.3% | o4-mini |

### Reasoning

- Winner: Not comparable
- GPT-4.5 public-lane score: Coming soon
- o4-mini public-lane score: Coming soon

| Benchmark | GPT-4.5 | o4-mini | Winner |
|-----------|-----------|-----------|--------|
| DROP | 83.4% | 77.7% | GPT-4.5 |

### Knowledge

- Winner: Not comparable
- GPT-4.5 public-lane score: Coming soon
- o4-mini public-lane score: Coming soon

| Benchmark | GPT-4.5 | o4-mini | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 90.8% | 90% | GPT-4.5 |
| GPQA | 69.5% | 77.6% | o4-mini |
| SimpleQA | 62.5% | 20.2% | GPT-4.5 |

### Multilingual

- Winner: Not comparable
- GPT-4.5 public-lane score: Coming soon
- o4-mini public-lane score: Coming soon

| Benchmark | GPT-4.5 | o4-mini | Winner |
|-----------|-----------|-----------|--------|
| MGSM | 86.9% | 93.7% | o4-mini |

### Mathematics

- Winner: Not comparable
- GPT-4.5 public-lane score: Coming soon
- o4-mini public-lane score: Coming soon

| Benchmark | GPT-4.5 | o4-mini | Winner |
|-----------|-----------|-----------|--------|
| MATH-500 | Coming soon | 97.5% | Coming soon |

## FAQ

### Which is better overall, GPT-4.5 or o4-mini?

GPT-4.5 is ahead overall on BenchLM right now.

### How many benchmarks does GPT-4.5 cover on BenchLM?

GPT-4.5 currently has 6 sourced benchmark scores on BenchLM.

### How many benchmarks does o4-mini cover on BenchLM?

o4-mini currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-4.5 vs o4-mini (high)](/compare/gpt-4-5-vs-o4-mini-high)
- [o4-mini vs o4-mini (high)](/compare/o4-mini-vs-o4-mini-high)
- [GPT-4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gpt-4-5)
- [o4-mini vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-o4-mini)

## Explore More

- [GPT-4.5 profile](/models/gpt-4-5)
- [o4-mini profile](/models/o4-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)