# GPT-4.1 nano vs GPT-4.5

> Side-by-side benchmark comparison for GPT-4.1 nano and GPT-4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-4-1-nano-vs-gpt-4-5
- Last updated: October 14, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-4.1 nano and GPT-4.5 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-4.1 nano has the lower published output-token price.
- GPT-4.1 nano has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-4.1 nano | GPT-4.5 |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 1M | 128K |
| Independent public score (not head-to-head) | 24.41 | null |
| Benchmarks Covered | 3 | 6 |
| Pricing (input/output) | $0.10 / $0.40 | $75.00 / $150.00 |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- GPT-4.1 nano public-lane score: 10.7 (Estimated · #142/149)
- GPT-4.5 public-lane score: Coming soon

| Benchmark | GPT-4.1 nano | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | Coming soon | 88.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-4.1 nano public-lane score: 39.8 (Unranked · 2 rankable rows)
- GPT-4.5 public-lane score: Coming soon

| Benchmark | GPT-4.1 nano | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| DROP | Coming soon | 83.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-4.1 nano public-lane score: 29.8 (Unranked · 1 rankable row)
- GPT-4.5 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-4.1 nano public-lane score: 25.7 (Supported · #168/181)
- GPT-4.5 public-lane score: Coming soon

| Benchmark | GPT-4.1 nano | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 80.1% | 90.8% | GPT-4.5 |
| GPQA | 50.3% | 69.5% | GPT-4.5 |
| SimpleQA | Coming soon | 62.5% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- GPT-4.1 nano public-lane score: Coming soon
- GPT-4.5 public-lane score: Coming soon

| Benchmark | GPT-4.1 nano | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| MGSM | Coming soon | 86.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-4.1 nano public-lane score: 36 (#111/128)
- GPT-4.5 public-lane score: Coming soon

| Benchmark | GPT-4.1 nano | GPT-4.5 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 83.2% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-4.1 nano and GPT-4.5?

Not yet. The models share only 2 sourced benchmark rows, 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-4.1 nano vs GPT-4.1](/compare/gpt-4-1-vs-gpt-4-1-nano)
- [GPT-4.5 vs GPT-4.1](/compare/gpt-4-1-vs-gpt-4-5)
- [GPT-4.1 nano vs GPT-4.1 mini](/compare/gpt-4-1-mini-vs-gpt-4-1-nano)
- [GPT-4.5 vs GPT-4.1 mini](/compare/gpt-4-1-mini-vs-gpt-4-5)

## Explore More

- [GPT-4.1 nano profile](/models/gpt-4-1-nano)
- [GPT-4.5 profile](/models/gpt-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)