# GPT-5.4 Pro vs Step 3.7 Flash

> GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 36.5 on the Noometry Index. Step 3.7 Flash costs 162× 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-3-7-flash
- 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 3 categories and Step 3.7 Flash in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.4 Pro leads 71.0 to 20.9.
- The biggest single-benchmark swing is CritPt: 30% for GPT-5.4 Pro and 2.3% for Step 3.7 Flash.
- Step 3.7 Flash is cheaper at $0.18 / $1.11 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 256K.
- Step 3.7 Flash has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.4 Pro | Step 3.7 Flash |
|---|---|---|
| Provider | OpenAI | StepFun |
| Noometry Index | 58.8 | 36.5 |
| Rank | 16 | 207 |
| Context | 1.05M | 256K |
| Input $/M | $30 | $0.18 |
| Output $/M | $180 | $1.11 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.4 Pro: 42.6 (#89)
- Step 3.7 Flash: 39.4 (#147)

| Benchmark | GPT-5.4 Pro | Step 3.7 Flash |
|---|---|---|
| SciCode | — | 40% |
| WeirdML | 57.4% | — |
| ALE-Bench | — | 694.12 |

## Reasoning

- GPT-5.4 Pro: 71.0 (#10)
- Step 3.7 Flash: 20.9 (#211)

| Benchmark | GPT-5.4 Pro | Step 3.7 Flash |
|---|---|---|
| CritPt | 30% | 2.3% |
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| NYT Connections (extended) | — | 39.7% |
| 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 3.7 Flash: 40.9 (#74)

| Benchmark | GPT-5.4 Pro | Step 3.7 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| MathArena Final-Answer Competitions | — | 68.5% |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |

## Knowledge

- GPT-5.4 Pro: 68.3 (#6)
- Step 3.7 Flash: —

| Benchmark | GPT-5.4 Pro | Step 3.7 Flash |
|---|---|---|
| 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 3.7 Flash?

GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 36.5 on the Noometry Index. Step 3.7 Flash costs 162× 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 3.7 Flash?

Step 3.7 Flash is cheaper. It lists at $0.18 per million input tokens and $1.11 per million output tokens; GPT-5.4 Pro lists at $30 and $180.

### Is GPT-5.4 Pro or Step 3.7 Flash better for coding?

GPT-5.4 Pro scores higher on coding benchmarks: 42.6 versus 39.4 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.4 Pro does, with 1.05M tokens against 256K.

### How many benchmarks do GPT-5.4 Pro and Step 3.7 Flash share?

1 benchmark has published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and Step 3.7 Flash has 5.