# GPT-5 Pro vs Step 5 Preview

> GPT-5 Pro is the stronger model overall, scoring 46.2 to 43.8 on the Noometry Index. Step 5 Preview costs 29× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-pro-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where Step 5 Preview leads 50.6 to 43.4.
- Step 5 Preview is cheaper at $1 / $2.70 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- Step 5 Preview accepts more context: 1.02M tokens versus 400K.

## Snapshot

| | GPT-5 Pro | Step 5 Preview |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 46.2 | 43.8 |
| Rank | 58 | 78 |
| Context | 400K | 1.02M |
| Input $/M | $15 | $1 |
| Output $/M | $120 | $2.70 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5 Pro: 43.4 (#77)
- Step 5 Preview: 50.6 (#40)

| Benchmark | GPT-5 Pro | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| WeirdML | 60.4% | — |
| AlgoTune | 1.31 | — |

## Reasoning

- GPT-5 Pro: 39.2 (#52)
- Step 5 Preview: 38.0 (#58)

| Benchmark | GPT-5 Pro | Step 5 Preview |
|---|---|---|
| ARC-AGI-2 | 18.3% | — |
| SimpleBench | 61.6% | — |
| Kagi LLM Benchmark | 76.8% | — |
| ARC-AGI-1 | 70.2% | — |
| CritPt | — | 20.9% |
| EnigmaEval | 18.8% | — |
| Epoch Capabilities Index | 150.26 | — |

## Math

- GPT-5 Pro: 48.0 (#53)
- Step 5 Preview: —

| Benchmark | GPT-5 Pro | Step 5 Preview |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| FrontierMath Tier 4 (v1) | 14.6% | — |

## Knowledge

- GPT-5 Pro: 56.2 (#39)
- Step 5 Preview: —

| Benchmark | GPT-5 Pro | Step 5 Preview |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |

## FAQ

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

GPT-5 Pro is the stronger model overall, scoring 46.2 to 43.8 on the Noometry Index. Step 5 Preview costs 29× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5 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 Pro lists at $15 and $120.

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

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 43.4 in the Noometry coding category.

### Which has the bigger context window?

Step 5 Preview does, with 1.02M tokens against 400K.

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

0 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Step 5 Preview has 3.