# GPT-5.4 Pro vs Step 5 Preview

> GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 43.8 on the Noometry Index. Step 5 Preview costs 47× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-4-pro-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5.4 Pro scores higher in 1 category and Step 5 Preview in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.4 Pro leads 71.0 to 38.0.
- The biggest single-benchmark swing is CritPt: 30% for GPT-5.4 Pro and 20.9% for Step 5 Preview.
- Step 5 Preview is cheaper at $1 / $2.70 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 1.02M.

## Snapshot

| | GPT-5.4 Pro | Step 5 Preview |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 58.8 | 43.8 |
| Rank | 16 | 78 |
| Context | 1.05M | 1.02M |
| Input $/M | $30 | $1 |
| Output $/M | $180 | $2.70 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.4 Pro: 42.6 (#89)
- Step 5 Preview: 50.6 (#40)

| Benchmark | GPT-5.4 Pro | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| WeirdML | 57.4% | — |

## Reasoning

- GPT-5.4 Pro: 71.0 (#10)
- Step 5 Preview: 38.0 (#58)

| Benchmark | GPT-5.4 Pro | Step 5 Preview |
|---|---|---|
| CritPt | 30% | 20.9% |
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| ARC-AGI-1 | 94.5% | — |
| Chess Puzzles | 58.6% | — |
| EnigmaEval | 23.8% | — |
| Epoch Capabilities Index | 159.12 | — |

## Math

- GPT-5.4 Pro: 72.0 (#17)
- Step 5 Preview: —

| Benchmark | GPT-5.4 Pro | Step 5 Preview |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |

## Knowledge

- GPT-5.4 Pro: 68.3 (#6)
- Step 5 Preview: —

| Benchmark | GPT-5.4 Pro | Step 5 Preview |
|---|---|---|
| GPQA Diamond | 94.6% | — |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |

## FAQ

### Is GPT-5.4 Pro better than Step 5 Preview?

GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 43.8 on the Noometry Index. Step 5 Preview costs 47× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.4 Pro or Step 5 Preview?

Step 5 Preview is cheaper. It lists at $1 per million input tokens and $2.70 per million output tokens; GPT-5.4 Pro lists at $30 and $180.

### Is GPT-5.4 Pro or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 42.6 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.4 Pro does, with 1.05M tokens against 1.02M.

### How many benchmarks do GPT-5.4 Pro and Step 5 Preview share?

1 benchmark has published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Step 5 Preview has 3.